# Low-Pass vs High-Pass Filter: Differences and Examples Compare low-pass and high-pass filters, cutoff formulas, practical circuits, and PCB trade-offs for ADCs, audio, PWM, and power rails. Written by [Jharwin Barrozo](https://www.flux.ai/jharwinbarrozo) Published Oct 2026 - 11 min read ![Low-Pass vs High-Pass Filter: Differences and Examples](https://www.flux.ai/p/assets/blogs/low-pass-vs-high-pass-filter/main.webp) ## Quick answer A low-pass filter passes DC and slow signal changes while attenuating higher-frequency content. A high-pass filter attenuates DC and slow signal changes while passing higher-frequency content. Choose low-pass for analog filtering, such as baseband ADC conditioning, PWM-to-analog smoothing, and supply-noise reduction. Choose high-pass for audio AC coupling, sensor baseline removal, and a speaker crossover's treble branch. ## Low-pass vs high-pass filter: comparison Picture frequency increasing to the right. A low-pass trace starts flat on the left and bends downward toward the right, while a high-pass trace rises from the left and becomes flat on the right. Both filters attenuate frequencies gradually around cutoff. *Table 1. Low-pass and high-pass filter comparison* | Specification | Low-pass | High-pass | Why it matters | | --- | --- | --- | --- | | **Useful spectrum** | Below the transition | Above the transition | Match the response to the measurement. | | **DC response** | Preserved | Rejected | AC coupling discards absolute sensor baseline. | | **Minimal passive RC** | Series R, shunt C | Series C, shunt R | Similar BOM, with different bias and return paths. | | **Phase at first-order cutoff** | −45° | +45° | Timing and crossover summation change. | | **Step response** | Rounded transition | Pulse that decays | Logic edges and sustained levels are altered. | | **Rail filtering** | Can suppress switching content | Cannot pass a DC supply through AC coupling | Signal filtering is not automatically power filtering. | | **PCB routing and return paths** | Short shunt-capacitor return | Defined receiving-side bias return | Parasitics and reference impedance matter. | ## Choose low-pass filter if… - **A baseband analog-to-digital converter (ADC)** measures a slowly changing quantity. Specify required rejection of interference and acquisition settling together. Anti-aliasing reduces frequencies that would fold into the sampled band. - **A microcontroller (MCU) produces a pulse-width modulation (PWM) output.** Preserve the duty-cycle average voltage while attenuating PWM-frequency harmonics, then balance ripple against response time under load. - **An analog power rail** carries switching noise. Check current, voltage drop, damping, and regulator stability before applying a signal-filter circuit. - **A speaker crossover** needs a low-frequency electrical branch. Speaker impedance and acoustic response still determine the final result. - **A button input** needs bounce suppression before threshold detection. Include hysteresis or firmware qualification to avoid repeated transitions. ## Choose high-pass filter if… - **An audio input** must reject upstream DC. Provide a receiver bias resistor and assess connection and startup transients. - **A vibration sensor** measures vibration rather than absolute displacement. Decide which low-frequency motion can be discarded. - **An amplifier** needs a different DC operating point from its source. A coupling capacitor blocks the source offset, while a resistor sets the new bias. - **A speaker crossover** needs a high-frequency electrical branch. The speaker's acoustic response determines final crossover behavior. - **When baseline drift dominates a measurement**, verify that useful waveform content does not occupy the same low-frequency region. ## Cutoff formulas, slope, phase, and step response Assume a low-impedance voltage source, negligible output loading, linear components, and a common AC reference. Analog Devices' [*Analog Filter Design Demystified*](https://www.analog.com/en/resources/technical-articles/analog-filter-design-demystified.html), dated February 13, 2003, gives the first-order RC transfer functions: Here *s* is the Laplace variable. At cutoff, output amplitude is of its passband value, giving: The −3 dB point means output voltage is 70.7% of passband amplitude and power is halved at equal impedance. A connected load changes the circuit impedance and may move the cutoff. For x equal to frequency divided by cutoff, the calculated phase responses are: At the cutoff frequency, the phase equations evaluate to −45° and +45°. The same equations give 20 dB of additional attenuation per tenfold change far beyond cutoff. Low-pass attenuation increases above cutoff, and high-pass attenuation increases below cutoff. Near cutoff the slope is gradual. Analog Devices' [*A Filter Primer*](https://www.analog.com/en/resources/technical-articles/a-filter-primer.html), dated September 18, 2002, relates the RC pole to exponential settling. Inverting the transfer functions for a normalized unit step, with zero initial energy, gives: After an input step, low-pass output rises gradually, while high-pass output briefly rises and decays. Check receiver thresholds, pulse duration, hysteresis, and input slew because filtering can change logic timing. ## Main circuit examples: RC low-pass and high-pass Changing where R and C connect produces different responses from the same parts. Use the same exact library parts in both examples: - Vishay CRCW060310K0FKEA chip resistor: nominal 10 kΩ, ±1%. - Murata GRM2195C1H103FA01D ceramic capacitor: nominal 10,000 pF, equivalent to 10 nF. Its dielectric is C0G and tolerance is ±1%. Calculation using those nominal values gives: The result assumes negligible source and load impedances. Use small signals and a high-impedance receiver or buffer. Include actual source and load impedance in the calculation if loading is significant. ### Low-pass: preserve the baseline For low-pass, connect source → R → OUT with C from OUT to return. Measure OUT relative to return. At DC the capacitor is effectively open. At higher frequencies its lower impedance diverts more current into return. The RC example illustrates signal conditioning before a buffer or ADC. ADC sampling draws charging current, so verify acquisition settling and any required capacitor at the input. For detailed sizing, see [Flux's RC low-pass filter guide](https://www.flux.ai/p/blog/rc-low-pass-filter). ### High-pass: remove the baseline For high-pass, connect source → C → OUT with R from OUT to the receiver's reference. Measure OUT relative to that reference. On a single-supply board, the reference may be a quiet DC bias voltage instead of ground. The same 1.59 kHz cutoff attenuates frequencies below that point. High-pass filtering suits changing sensor signals or AC coupling when DC level is unnecessary. Check capacitor voltage stress from source/receiver bias differences, input bias current, startup charging, and protection. Keep the receiver's input impedance high relative to R to preserve the nominal calculation. ## Beyond RC: RL, LC, and Sallen–Key RL and LC networks use inductors. Sallen–Key circuits add an [op-amp](https://www.flux.ai/p/blog/inverting-op-amp) for second-order active filtering. ### RL: choose the output deliberately For a series resistor-inductor (RL) chain, measure voltage across R for low-pass behavior or across L for high-pass behavior. A voltage-divider derivation using inductive impedance (sL) gives: For a small-signal numerical example, use Vishay's 100 Ω resistor CRCW0603100RFKEA with the Bourns SDR0604-100ML 10 µH inductor. Vishay's ordering guide identifies R as the resistance decimal marker and F as ±1%. Decoding 100R therefore gives nominal 100 Ω. With nominal L = 10 µH, calculation gives fc = 1.59155 MHz. Use a low-impedance source and high-impedance measurement. Measure the voltage across R for low-pass and L for high-pass. Bourns specifies minimum self-resonant frequency of 23 MHz in revision 04/26, so the calculated cutoff falls below self-resonance. Winding resistance, parasitics, and termination still require a measured sweep. ### LC: natural frequency is not automatically −3 dB cutoff **To damp LC resonance, reuse the 100 Ω resistor:** low-pass connections are source → R → L → OUT with C from OUT to return. The high-pass dual uses source → R → C → OUT with L from OUT to return. Assume a low-impedance source and high-impedance receiver. Include actual terminal impedances when loading is significant. TI's *LC Filter Design*, SLAA701B, revised June 2026, gives the LC natural-frequency relationship. Voltage-divider analysis of these series-damped, high-impedance reference circuits gives: Here R is the series resistor that controls damping. With Bourns SDR0604-100ML, nominal 10 µH, ±20%, from the manufacturer's SDR0604 datasheet revision 04/26, the Murata capacitor, and R = 100 Ω, calculation gives nominal f0 = 503.29 kHz and Q = 0.316. The nominal values estimate resonance and damping. The loaded circuit determines the actual −3 dB cutoff. **Loading, losses, and Q determine resonance peaking and cutoff.** TI's *RLC Filter Design for ADC Interface Applications* explicitly distinguishes characteristic frequency from −3 dB bandwidth. For power rails, see [Flux's pi-filter guide](https://www.flux.ai/p/blog/pi-filter) for damping and regulator stability. ### Active Sallen–Key: isolate loading and control response **An op-amp buffers the two-stage RC network.** TI's *Analysis of the Sallen-Key Architecture*, SLOA024B, revised September 2002, gives equal-component relationships: With a unity-gain follower, K = 1 and the calculated Q is 0.5, below a Butterworth filter's 0.707. Reuse the RC example's 10 kΩ resistors and 10 nF capacitors as matched nominal pairs. For low-pass, connect two series resistors between IN and noninverting input B, with midpoint A. One capacitor connects B to return, and another connects A to amplifier OUT. Connect the inverting input to OUT. The high-pass dual uses two series capacitors, R from B to return, and R from A to OUT. For the active stage, use TI OPA197IDBVR within its datasheet supply and signal ranges, with recommended bypassing and a light load. For ground-referenced bipolar signals, dual supplies simplify biasing. Single-supply operation needs a DC bias reference. Both Sallen–Key sections have nominal f0 = 1.59 kHz. Solving TI's second-order response at Q = 0.5 gives calculated −3 dB frequencies of 1.02431 kHz for low-pass and 2.47291 kHz for high-pass. At Q = 0.5, the −3 dB cutoff differs from . Component mismatch and finite amplifier gain alter the response. ## Band-pass vs low-pass and band-stop filters Low-pass passes DC, whereas band-pass selects a bounded frequency range. Cascading the earlier high-pass and low-pass stages with a buffer between them yields: The calculated nominal peak is at 1.59155 kHz with amplitude 0.5 relative to input, equivalent to −6 dB at the peak. Without the buffer, stage loading changes the response. For a numerical band-stop example, connect a 100 Ω resistor from a low-impedance source to OUT, with the Bourns inductor and Murata capacitor in series from OUT to return. For a high-impedance receiver, ideal series resonance is 503.29 kHz and calculated Q = sqrt(L/C)/R = 0.316: Q = 0.316 predicts broad rejection. Actual winding loss limits depth, tolerances move the rejection frequency, and parasitics and loading affect bandwidth. Measure the response. The inductor's self-resonance constrains the upper passband. Measure rejection depth and bandwidth. ## Design considerations: schematic, BOM, and PCB Real impedances and component behavior affect the final filter response. **Impedances first.** Model source resistance and receiving impedance. Source resistance adds to the passive low-pass series R, and the receiver loads C. For AC coupling, the receiver's bias resistor affects cutoff. **Dielectric and tolerance.** Murata's C02E catalog distinguishes temperature-compensating capacitors from high-dielectric-constant types and describes DC-bias capacitance change. Capacitance changes move cutoff. Prefer C0G for stable signal-filter timing. For X7R capacitors, obtain the exact part's bias curve instead of equating nominal capacitance or temperature classification with capacitance under operating bias. Recalculate frequency and Q across component tolerances, voltage, and temperature. Nominal tolerance does not account for dielectric effects. **Preferred values.** Vishay document 28372, revision 22-Aug-12, lists E24 and E96 according to IEC 60063. Choose available preferred values, then recompute response. Check each part's tolerance and availability. **Op-amp bandwidth.** OPA197 has typical 10 MHz unity-gain bandwidth under its stated supply test conditions. Gain-bandwidth product (GBW) affects the active filter's response. Evaluate loop gain, Q sensitivity, noise, slew rate, headroom, and capacitive loading rather than using a universal bandwidth multiplier. **Placement and returns.** Put input interference filtering near the connector, but place ADC filters where acquisition settling requires. Keep shunt paths short and referenced to the receiver's low-impedance return. Avoid coupling switching traces into the filtered node, shared noisy return paths, and inductor fields near sensitive analog nodes. Preserve short op-amp feedback geometry. See Flux's [signal integrity guide](https://www.flux.ai/p/blog/what-is-signal-integrity-pcb) for routing guidance. ## FAQ ### What is the difference between a high pass vs low pass filter? High-pass attenuates lower-frequency content, including DC, **whereas** low-pass attenuates higher-frequency content while preserving DC in the basic circuit. Choose according to which information the receiver must retain. ### Is a low pass filter vs high pass filter better for an ADC? For a baseband measurement including DC, low-pass is normally the starting point. Its attenuation, bandwidth, and acquisition settling must satisfy the sampled-data requirements. ### Does a high-pass filter remove DC from a sensor? The basic AC-coupled circuit rejects a steady input baseline after its transient settles. That helps changing-signal measurements but loses absolute-level information. ### Can low-pass filtering convert PWM to analog? **Low-pass filtering** preserves the duty-cycle-dependent average while reducing switching ripple. Load, permitted ripple, and settling time determine whether buffering or additional filtering is necessary. ### What is band pass vs low pass filter selection based on? Choose low-pass when DC through an upper bandwidth limit is useful. Choose band-pass when both lower- and higher-frequency content are unwanted. ### Will an RC filter debounce a button? **An RC filter** can suppress rapid variations but does not guarantee one valid digital transition. Include hysteresis or time qualification and verify bounce, leakage, tolerances, and timing. ## Sources - Analog Devices, *Analog Filter Design Demystified*, February 13, 2003: [https://www.analog.com/en/resources/technical-articles/analog-filter-design-demystified.html](https://www.analog.com/en/resources/technical-articles/analog-filter-design-demystified.html) - Analog Devices, *A Filter Primer*, September 18, 2002: [https://www.analog.com/en/resources/technical-articles/a-filter-primer.html](https://www.analog.com/en/resources/technical-articles/a-filter-primer.html) - TI, *Analysis of the Sallen-Key Architecture*, SLOA024B, July 1999, revised September 2002: [https://www.ti.com/lit/an/sloa024b/sloa024b.pdf](https://www.ti.com/lit/an/sloa024b/sloa024b.pdf) - TI, *RLC Filter Design for ADC Interface Applications*, SBAA108A, December 2003, revised January 2005: [https://www.ti.com/lit/an/sbaa108a/sbaa108a.pdf](https://www.ti.com/lit/an/sbaa108a/sbaa108a.pdf) - TI, *LC Filter Design*, SLAA701B, October 2016, revised June 2026: [https://www.ti.com/lit/pdf/slaa701](https://www.ti.com/lit/pdf/slaa701) - Vishay, *D/CRCW e3*, document 20035, revision 14-Apr-2026: [https://www.vishay.com/docs/20035/dcrcwe3.pdf](https://www.vishay.com/docs/20035/dcrcwe3.pdf) - Vishay, *D/CRCW e3*, document 20035, revision 14-Apr-2026, for CRCW0603100RFKEA: [https://www.vishay.com/docs/20035/dcrcwe3.pdf](https://www.vishay.com/docs/20035/dcrcwe3.pdf) - Murata, *Chip Multilayer Ceramic Capacitors for General*, C02E.pdf, Nov.27,2017: - Bourns, *SDR0604 Series*, revision 04/26: [https://www.bourns.com/docs/product-datasheets/sdr0604.pdf](https://www.bourns.com/docs/product-datasheets/sdr0604.pdf) - TI, *OPA197 / OPA2197 / OPA4197*, SBOS737C, January 2016, revised March 2018: [https://www.ti.com/lit/gpn/opa197](https://www.ti.com/lit/gpn/opa197) - Vishay, *Standard Series Values in a Decade for Resistances and Capacitances*, document 28372, revision 22-Aug-12: [https://www.vishay.com/docs/28372/e-series.pdf](https://www.vishay.com/docs/28372/e-series.pdf) ## About the author [Jharwin Barrozo](https://www.flux.ai/jharwinbarrozo) Electronics Engineer at Flux Jharwin is an electronics engineer mainly focused on satellites. 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A Practical Guide 22 Min Read](https://www.flux.ai/p/blog/what-is-signal-integrity-pcb)[ ![High-Speed PCB Design: Layout Rules, Signal Integrity, and Routing Best Practices](https://www.flux.ai/p/assets/blogs/high-speed-pcb-design/main.webp) ### High-Speed PCB Design: Layout Rules, Signal Integrity, and Routing Best Practices 11 Min Read](https://www.flux.ai/p/blog/high-speed-pcb-design-layout-rules)[ ![A detailed illustration of EMI and EMC concepts in PCB design showing shielding, grounding, and interference reduction techniques](https://www.flux.ai/p/assets/blogs/emi-emc-pcb-design-guide/main.webp) ### EMI/EMC in PCB Design: How to Reduce Interference 11 Min Read](https://www.flux.ai/p/blog/emi-emc-pcb-design-guide)[ ![Illustration for PCB EMI Problems: Causes and Solutions](https://www.flux.ai/p/assets/blogs/pcb-emi-issues/main.webp) ### PCB EMI Problems: Causes and Solutions 9 Min Read](https://www.flux.ai/p/blog/pcb-emi-issues)[ ![Differential Pair Routing Guidelines and Controlled Impedance Best Practices](https://www.flux.ai/p/assets/blogs/differential-pair-routing/main.webp) ### Differential Pair Routing Guidelines and Controlled Impedance Best Practices 10 Min Read](https://www.flux.ai/p/blog/differential-pair-routing)[ ![An illustration of PCB impedance control concepts showing trace geometry, dielectric layers, and signal integrity](https://www.flux.ai/p/assets/blogs/pcb-impedance-control-guide/main.webp) ### PCB Impedance Control: A Practical Guide for Engineers 7 Min Read](https://www.flux.ai/p/blog/pcb-impedance-control-guide)[ ![Introducing Curved Traces in Flux](https://www.flux.ai/p/assets/blogs/curved-traces/main.webp) ### Introducing Curved Traces in Flux 3 Min Read](https://www.flux.ai/p/blog/introducing-curved-traces-in-flux)[ ![Illustration for Analog vs Digital PCB Design: Key Differences Explained](https://www.flux.ai/p/assets/blogs/analog-vs-digital-pcb-design/main.webp) ### Analog vs Digital PCB Design: Key Differences Explained 6 Min Read](https://www.flux.ai/p/blog/analog-vs-digital-pcb-design)[ ![CLC pi filter schematic with two shunt capacitors flanking a series inductor between VIN and VOUT](https://www.flux.ai/p/assets/blogs/pi-filter/main.webp) ### Pi Filters Explained: Design, Components & Applications 8 Min Read](https://www.flux.ai/p/blog/pi-filter)[ ![RS485 electrical pin out and it's actual physical connector in 3D](https://www.flux.ai/p/assets/blogs/rs485/main.webp) ### RS485 Explained: Wiring, Specifications, and Applications 6 Min Read](https://www.flux.ai/p/blog/rs485-a-technical-overview)[ ![What is RS232?](https://www.flux.ai/p/assets/blogs/rs232/main.webp) ### What is RS232? 5 Min Read](https://www.flux.ai/p/blog/what-is-rs232)[ ![SPI vs. I2C: Which Communication Protocol Should You Use?](https://www.flux.ai/p/assets/blogs/spi-vs-i2c/main.webp) ### SPI vs. I2C: Which Communication Protocol Should You Use? 7 Min Read](https://www.flux.ai/p/blog/spi-vs-i2c)[ ![RJ45 Connectors: Pinouts, Categories, Uses, and Testing](https://www.flux.ai/p/assets/blogs/hatter/rj45/main.webp) ### RJ45 Connectors: Pinouts, Categories, Uses, and Testing 6 Min Read](https://www.flux.ai/p/blog/rj45-connectors-your-quick-guide-to-specs-and-uses)[ ![CO2 Sensor Technology: How These Devices Detect Carbon Dioxide](https://www.flux.ai/p/assets/blogs/hatter/co2-sensor/main.webp) ### CO2 Sensor Technology: How These Devices Detect Carbon Dioxide 5 Min Read](https://www.flux.ai/p/blog/co2-sensor-technology-how-these-devices-detect-carbon-dioxide)[ ![Hall Effect Joysticks: How They Work, Benefits, and Uses](https://www.flux.ai/p/assets/blogs/hatter/hall-effect/main.webp) ### Hall Effect Joysticks: How They Work, Benefits, and Uses 6 Min Read](https://www.flux.ai/p/blog/how-hall-effect-joysticks-deliver-unmatched-accuracy)[ ![A close up of a crystal oscillator on an electronic printed circuit board.](https://www.flux.ai/p/assets/blogs/oscillators/main.webp) ### What Is an Oscillator? Beginner's Guide to Oscillating Circuits 3 Min Read](https://www.flux.ai/p/blog/what-is-an-oscillator-a-beginners-guide-to-oscillating-circuits)[ ![A guide to flexible PCB design covering materials, layout rules, and applications for modern electronics](https://www.flux.ai/p/assets/blogs/flex-pcb-design-guide/main.webp) ### Flexible PCB Design Guide: Materials, Layout, and Applications 7 Min Read](https://www.flux.ai/p/blog/flex-pcb-design-guide)[ ![Illustration for Rigid-Flex PCB Design: Benefits, Challenges, and Layout Tips](https://www.flux.ai/p/assets/blogs/rigid-flex-pcb-design/main.webp) ### Rigid-Flex PCB Design: Benefits, Challenges, and Layout Tips 7 Min Read](https://www.flux.ai/p/blog/rigid-flex-pcb-design)[ ![Illustration of printed PCB trace antennas with RF routing, ground-plane keepouts, and radiating elements.](https://www.flux.ai/p/assets/blogs/how-to-design-pcb-trace-antenna/main.webp) ### The RF Engineer's Guide to Designing Printed Trace Antennas 6 Min Read](https://www.flux.ai/p/blog/how-to-design-pcb-trace-antenna)[ ![Illustration of SMA connectors and RF PCB mounting styles used for high-frequency signal connections.](https://www.flux.ai/p/assets/blogs/sma-connectors/main.webp) ### SMA Connectors Explained: Types, Applications, and PCB Design Considerations 7 Min Read](https://www.flux.ai/p/blog/sma-connectors)[ ![RC low-pass filter concept art showing a noisy input waveform smoothed into a clean sine wave over a PCB](https://www.flux.ai/p/assets/blogs/rc-low-pass-filter/main.webp) ### RC Low-Pass Filter: Formula, Cutoff Frequency & Design 10 Min Read](https://www.flux.ai/p/blog/rc-low-pass-filter)[ ![A smartphone beside an NFC reader board and a contactless tag.](https://www.flux.ai/p/assets/blogs/nfc-vs-rfid/main.webp) ### NFC vs RFID: Board Design, Tags, and Reader Choices 13 Min Read](https://www.flux.ai/p/blog/nfc-vs-rfid)[ ![A Bluetooth module on a PCB, with the antenna placed at the board edge.](https://www.flux.ai/p/assets/blogs/how-to-choose-a-bluetooth-module/main.webp) ### How to Choose a Bluetooth Module for Your PCB Design 11 Min Read](https://www.flux.ai/p/blog/how-to-choose-a-bluetooth-module)[ ![Different packages of voltage regulators and its common reference design](https://www.flux.ai/p/assets/blogs/decoding-voltage-regulators/main.webp) ### Decoding Voltage Regulators: How They Work in Everyday Electronics 5 Min Read](https://www.flux.ai/p/blog/decoding-voltage-regulators-how-they-work-in-everyday-electronics)[ ![Voltage Regulators: How They Work, Types, and Applications](https://www.flux.ai/p/assets/blogs/hatter/voltage-regulator/main.webp) ### Voltage Regulators: How They Work, Types, and Applications 4 Min Read](https://www.flux.ai/p/blog/voltage-regulator-principles-types-and-key-applications)[ ![PCB Design for Buck Switching Converter Best Practices](https://www.flux.ai/p/assets/blogs/buck-converter/main.webp) ### Buck Converter Design: Components, PCB Layout, and Formulas 7 Min Read](https://www.flux.ai/p/blog/design-buck-converters-like-a-pro)[ ![Side by side high level schematic diagram of a buck and boost converter with their roles in power systems](https://www.flux.ai/p/assets/blogs/buck-boost-converters/main.webp) ### Buck and Boost Converters: How They Work and Where They’re Used 3 Min Read](https://www.flux.ai/p/blog/explore-the-advantages-of-buck-and-boost-converter-in-modern-electronics)[ ![Typical schematic diagram of LM2596 buck converter or step-down converter with its various external components like capacitors, zener diode, and inductor](https://www.flux.ai/p/assets/blogs/lm2596/main.webp) ### LM2596 in Action: Case Study of Its Application in Power Supply Units 5 Min Read](https://www.flux.ai/p/blog/lm2596-in-action-case-study-of-its-application-in-power-supply-units)[ ![A complex printed circuit board highlighting the proper usage of ground fills/poor, stitching vias and power planes, without any components.](https://www.flux.ai/p/assets/blogs/gnd-fills-power-planes/main.webp) ### Guide to GND Fills and Power Planes 6 Min Read](https://www.flux.ai/p/blog/guide-to-gnd-fills-and-power-planes)[ ![Illustration for Power Distribution Network (PDN) Design in PCBs](https://www.flux.ai/p/assets/blogs/pdn-design-pcb/main.webp) ### Power Distribution Network (PDN) Design in PCBs 10 Min Read](https://www.flux.ai/p/blog/pdn-design-pcb)[ ![A detailed illustration of PCB grounding techniques showing ground planes, return paths, and noise reduction strategies](https://www.flux.ai/p/assets/blogs/pcb-grounding-techniques/main.webp) ### PCB Grounding Techniques for Noise Reduction and Stability 11 Min Read](https://www.flux.ai/p/blog/pcb-grounding-techniques)[ ![A detailed illustration of high-current PCB design showing trace sizing, thermal management, and power layout strategies](https://www.flux.ai/p/assets/blogs/high-current-pcb-design/main.webp) ### Designing High-Current PCBs: Layout and Safety Considerations 8 Min Read](https://www.flux.ai/p/blog/high-current-pcb-design)[ ![An illustration showing PCB trace resistance calculation concepts with copper traces and measurement tools](https://www.flux.ai/p/assets/blogs/how-to-calculate-pcb-trace-resistance/main.webp) ### How to Calculate PCB Trace Resistance 6 Min Read](https://www.flux.ai/p/blog/how-to-calculate-pcb-trace-resistance)[ ![A focused electrician wearing safety gear is carefully inspecting or repairing an electrical box with wires attached to it. He wears a yellow hard hat, safety glasses, ear protection, and gloves, highlighting the importance of personal protective equipment when working with electrical systems. The meticulous examination of the electrical connections signifies the critical nature of ensuring proper voltage levels and avoiding voltage drop, which can lead to reduced efficiency and potential damage to electrical components.](https://www.flux.ai/p/assets/blogs/voltage-drop/main.webp) ### Voltage Drop Calculations: Formulas, Factors, and Guidelines 5 Min Read](https://www.flux.ai/p/blog/importance-of-voltage-drop-calculations)[ ![An array of AC to DC converter circuit boards featuring components like transformers, bridge rectifiers, and capacitors to facilitate the conversion of alternating current to direct current.](https://www.flux.ai/p/assets/blogs/ac-to-dc-converters/main.webp) ### AC to DC Converter: The Backbone of Power Electronics 4 Min Read](https://www.flux.ai/p/blog/ac-to-dc-converter-the-backbone-of-power-electronics)[ ![AC-to-DC Converters: How They Work, Types, and Design Tips](https://www.flux.ai/p/assets/blogs/hatter/ac-dc-converter/main.webp) ### AC-to-DC Converters: How They Work, Types, and Design Tips 5 Min Read](https://www.flux.ai/p/blog/what-is-an-ac-to-dc-converter-technical-basics-explained)[ ![Illustration for Thermal Management in PCB Design: Methods and Best Practices](https://www.flux.ai/p/assets/blogs/pcb-thermal-management/main.webp) ### Thermal Management in PCB Design: Methods and Best Practices 10 Min Read](https://www.flux.ai/p/blog/pcb-thermal-management)[ ![PCB Thermal Management: Analysis and Design Best Practices](https://www.flux.ai/p/assets/blogs/pcb-thermal-analysis/main.webp) ### PCB Thermal Management: Analysis and Design Best Practices 6 Min Read](https://www.flux.ai/p/blog/achieving-efficient-heat-flow-pcb-thermal-management-best-practices)[ ![Illustration of a PPS chip symbolically powering three fast charging technologies—PPS, Power Delivery (PD), and Quick Charge (QC)—on a dark background.](https://www.flux.ai/p/assets/blogs/programmable-power-supply/main.webp) ### Understanding PPS Fast Charging: What It Is and How It Works 3 Min Read](https://www.flux.ai/p/blog/understanding-pps-fast-charging-what-it-is-and-how-it-works)[ ![Illustration for Decoupling Capacitors in PCB Design: Placement and Selection](https://www.flux.ai/p/assets/blogs/decoupling-capacitors-pcb/main.webp) ### Decoupling Capacitors in PCB Design: Placement and Selection 9 Min Read](https://www.flux.ai/p/blog/decoupling-capacitors-pcb)[ ![The image presents a graphical representation of Multilayer Ceramic Capacitors (MLCCs). On the left side of the image, there is a three-dimensional illustration of a capacitor, with a beige body and alternating white and golden layers, representing the ceramic and metal layers of the capacitor. An arrow points from this illustration to the right side of the image, where there is a cutaway view of a similar capacitor, showing multiple golden conducting layers separated by white ceramic layers, which illustrate the internal structure of the capacitor. The background is dark green, and above the illustrations, in large white and green text, the acronym "MLCCs" is spelled out, followed by the full term "MULTILAYER CERAMIC CAPACITORS" in smaller capital letters.](https://www.flux.ai/p/assets/blogs/multilayer-ceramic-capacitors/main.webp) ### What Is a Multilayer Ceramic Capacitor (MLCC)? 5 Min Read](https://www.flux.ai/p/blog/what-is-a-multilayer-ceramic-capacitor-key-features-and-applications)[ ![Cutaway diagram of a tantalum capacitor showing anode, dielectric, cathode layers, epoxy case, and leads](https://www.flux.ai/p/assets/blogs/tantalum-capacitor/main.webp) ### Tantalum Capacitors Guide: Polarity, Derating & Risks 7 Min Read](https://www.flux.ai/p/blog/tantalum-capacitor)[ ![A big text Amps vs Volts with their corresponding symbols (I and V) as background](https://www.flux.ai/p/assets/blogs/amps-vs-volts/main.webp) ### Amps vs. Volts: Key Differences and How They Work Together 4 Min Read](https://www.flux.ai/p/blog/amps-vs-volts-understanding-the-key-differences)[ ![Shunt resistor, Hall-effect, and current transformer current sensors compared.](https://www.flux.ai/p/assets/blogs/current-sensor-types/main.webp) ### Current Sensor Types: Shunt, Hall Effect, and Current Transformer Comparison 12 Min Read](https://www.flux.ai/p/blog/current-sensor-types)[ ![Cylindrical and pouch battery cells beside a battery-management circuit board.](https://www.flux.ai/p/assets/blogs/li-ion-vs-lipo-vs-lifepo4-vs-nimh/main.webp) ### Li-ion vs LiPo vs LiFePO4 vs NiMH for Hardware Design 16 Min Read](https://www.flux.ai/p/blog/li-ion-vs-lipo-vs-lifepo4-vs-nimh)[ ![Never Worry About Stackups Again: Introducing the Stackup Editor](https://www.flux.ai/p/assets/blogs/stackup_editor/main.webp) ### Never Worry About Stackups Again: Introducing the Stackup Editor 3 Min Read](https://www.flux.ai/p/blog/never-worry-about-stackups-again-introducing-the-stackup-editor)[ ![Flux Stackup Editor showing a Standard 4-Layer PCB stackup with Top Copper, Mid-Layer 1, Mid-Layer 2, and Bottom Copper signal layers separated by Prepreg and Core dielectric materials, with layer thicknesses and dielectric constants configured for impedance-controlled PCB design.](https://www.flux.ai/p/assets/blogs/multilayer-pcb-design/main.webp) ### Multilayer PCB Design: Stackup and Routing Best Practices 8 Min Read](https://www.flux.ai/p/blog/multilayer-pcb-design-best-practices)[ ![An illustrated guide to PCB materials comparing FR4 and advanced substrates for high-performance circuit board design](https://www.flux.ai/p/assets/blogs/pcb-materials-guide/main.webp) ### How to Choose PCB Materials: FR4 vs Advanced Substrates 7 Min Read](https://www.flux.ai/p/blog/pcb-materials-guide)[ ![A detailed illustration showing the cross-section of a multilayer PCB with different via types including through-hole, blind, buried, and microvias](https://www.flux.ai/p/assets/blogs/pcb-via-types-guide/main.webp) ### Blind Vias, Buried Vias, and Microvias: A Complete Guide to PCB Via Types 12 Min Read](https://www.flux.ai/p/blog/pcb-via-types-guide)[ ![A 2d view and layout of a pcb board design showing different type of vias](https://www.flux.ai/p/assets/blogs/different-type-vias/main.webp) ### Exploring Different Types of Vias in PCB 2 Min Read](https://www.flux.ai/p/blog/exploring-different-types-of-pcb-vias)[ ![A complex PCB board with high-density interconnect (HDI) technology, featuring advanced routing on each of its copper layers.](https://www.flux.ai/p/assets/blogs/smart-micro-vias-blind-buried-vias/main.webp) ### High-Density PCBs just got easier with Smart Vias 4 Min Read](https://www.flux.ai/p/blog/high-density-pcbs-just-got-easier-with-smart-vias)[ ![A detailed illustration of a multilayer PCB cross-section showing via stitching connecting ground planes across layers](https://www.flux.ai/p/assets/blogs/via-stitching-pcb-guide/main.webp) ### How to Use Via Stitching in PCB Design 11 Min Read](https://www.flux.ai/p/blog/via-stitching-pcb-guide)[ ![An illustration of PCB design constraints showing electrical, mechanical, and manufacturing rules](https://www.flux.ai/p/assets/blogs/pcb-design-constraints/main.webp) ### PCB Design Constraints: What Engineers Need to Know 7 Min Read](https://www.flux.ai/p/blog/pcb-design-constraints)[ ![PCB constraint management showing how engineers control layout rules for routing, spacing, and impedance](https://www.flux.ai/p/assets/blogs/pcb-constraint-management/main.webp) ### PCB Constraint Management: How Engineers Control Layout Rules 6 Min Read](https://www.flux.ai/p/blog/pcb-constraint-management)[ ![Design Rule Checking (DRC) in PCB Design: Real-Time vs Batch, Rules, and Common Failures](https://www.flux.ai/p/assets/blogs/pcb-drc/main.webp) ### Design Rule Checking (DRC) in PCB Design: Real-Time vs Batch, Rules, and Common Failures 8 Min Read](https://www.flux.ai/p/blog/pcb-design-rule-checking-drc)[ ![ERC vs DRC in PCB design showing the difference between electrical rule checks and design rule checks](https://www.flux.ai/p/assets/blogs/erc-vs-drc/main.webp) ### Electrical Rule Check (ERC) vs DRC in PCB Design 7 Min Read](https://www.flux.ai/p/blog/erc-vs-drc)[ ![A guide to PCB design reviews covering schematic, layout, and DFM checks for catching errors early](https://www.flux.ai/p/assets/blogs/pcb-design-review-process/main.webp) ### PCB Design Reviews: Best Practices for Catching Errors Early 6 Min Read](https://www.flux.ai/p/blog/pcb-design-review-process)[ ![Common PCB Design Mistakes and How to Avoid Them](https://www.flux.ai/p/assets/blogs/pcb-design-mistakes/main.webp) ### Common PCB Design Mistakes and How to Avoid Them 31 Min Read](https://www.flux.ai/p/blog/pcb-design-mistakes)[ ![Image showing a stack of printed circuit boards (PCBs) with a large white 'X' over them, highlighting '5 Common Mistakes in PCB Design.' The background features intricate PCB traces in red and blue on a dark surface, with a purple gradient highlighting the title. The image emphasizes errors commonly made in PCB design, such as layout, signal integrity, and component placement.](https://www.flux.ai/p/assets/blogs/5-common-mistakes-in-pcb-design/main.webp) ### 5 Common PCB Design Mistakes and How to Avoid Them 7 Min Read](https://www.flux.ai/p/blog/5-pcb-design-mistakes-that-could-ruin-your-board)[ ![A guide to PCB silkscreen design covering labeling, readability, and common manufacturing mistakes](https://www.flux.ai/p/assets/blogs/pcb-silkscreen-design/main.webp) ### PCB Silkscreen Design: Guidelines and Common Mistakes 7 Min Read](https://www.flux.ai/p/blog/pcb-silkscreen-design)[ ![Advanced complex PCB boards using Flux's Smart Polygons](https://www.flux.ai/p/assets/blogs/smart-polygons/main.webp) ### Smart Polygons: Advanced PCB Design Just Got Easier 4 Min Read](https://www.flux.ai/p/blog/smart-polygons-advanced-pcb-design-just-got-easier)[ ![A complex printed circuit board with lots of electronic components. A 3D render of the PCB on Flux.](https://www.flux.ai/p/assets/blogs/new-3d-render/main.webp) ### Automatically Create Photorealistic PCB Renders 3 Min Read](https://www.flux.ai/p/blog/automatically-create-photorealistic-pcb-renders)[ ![A tool on Flux to measure the distance between two pads in PCB editor with a text mm to mil conversion.](https://www.flux.ai/p/assets/blogs/mm-to-mil/main.webp) ### How to Convert from MM to Mils: a Guide for Beginners 4 Min Read](https://www.flux.ai/p/blog/how-to-convert-from-mm-to-mils-a-guide-for-beginners)[ ![Illustration of a printed circuit board showing solder mask over copper traces and exposed pads.](https://www.flux.ai/p/assets/blogs/what-is-solder-mask/main.webp) ### What Is Solder Mask? Materials, Colors, and PCB Design Rules 6 Min Read](https://www.flux.ai/p/blog/what-is-solder-mask)[ ![Designing Custom PCB Outlines: Fixing DXF and SVG Import Failures](https://www.flux.ai/p/assets/blogs/import-dxf-board-outline-error/main.webp) ### Designing Custom PCB Outlines: Fixing DXF and SVG Import Failures 6 Min Read](https://www.flux.ai/p/blog/import-dxf-board-outline-error)[ ![PCB Enclosure Design: How to Design an Enclosure](https://www.flux.ai/p/assets/blogs/pcb-enclosure-design/main.webp) ### PCB Enclosure Design: How to Design an Enclosure 13 Min Read](https://www.flux.ai/p/blog/pcb-enclosure-design)[ ![A PCB layout with IPC design standards that apply to trace width, land patterns, and assembly.](https://www.flux.ai/p/assets/blogs/pcb-ipc-standards/main.webp) ### PCB IPC Standards Explained: IPC-2221, IPC-2152, IPC-7351, and More 9 Min Read](https://www.flux.ai/p/blog/pcb-ipc-standards)[ ![A guide to PCB component selection covering electrical specs, footprints, thermal performance, and sourcing best practices](https://www.flux.ai/p/assets/blogs/component-selection-pcb-design/main.webp) ### Component Selection in PCB Design: How Engineers Choose the Right Parts 7 Min Read](https://www.flux.ai/p/blog/component-selection-pcb-design)[ ![Flux Copilot’s new AI-powered part search makes finding and placing components faster and easier using natural language.](https://www.flux.ai/p/assets/blogs/smarter-part-search/main.webp) ### Smarter Part Search Just Got a Major Upgrade 6 Min Read](https://www.flux.ai/p/blog/smarter-part-search-just-got-a-major-upgrade)[ ![A detailed illustration showing PCB footprint design with pad layout, silkscreen markings, and courtyard boundaries](https://www.flux.ai/p/assets/blogs/pcb-footprint-design-guide/main.webp) ### How to Design a PCB Footprint (Step-by-Step Guide) 8 Min Read](https://www.flux.ai/p/blog/pcb-footprint-design-guide)[ ![A close-up xray of printed circuit board with its multi-layer traces featuring short circuit and over current protection.](https://www.flux.ai/p/assets/blogs/protection-circuit-101/main.webp) ### Protection Circuit 101: Securing Your Electronics from Overcurrent and Short Circuits 5 Min Read](https://www.flux.ai/p/blog/protection-circuit-101-securing-your-electronics-from-overcurrent-and-short-circuits)[ ![Diagram of a simple circuit with an inductor and a flyback diode. The resistor represents the resistance of the inductor's windings.](https://www.flux.ai/p/assets/blogs/flyback-diodes/main.webp) ### Understanding the Flyback Diode: Your Essential Guide to Functionality and Why You Need One 3 Min Read](https://www.flux.ai/p/blog/understanding-the-flyback-diode-your-essential-guide-to-functionality-and-why-you-need-one)[ ![3D render of a zener diode with its electronic symbol and pinout which consists of anode and cathode](https://www.flux.ai/p/assets/blogs/what-is-zener-diode/main.webp) ### What Is a Zener Diode? How It Works and Where It’s Used 5 Min Read](https://www.flux.ai/p/blog/what-is-a-zener-diode-an-essential-breakdown)[ ![A cross-section through an nMOSFET when the gate voltage VGS is below the threshold for making a conductive channel; there is little or no conduction between the terminals drain and source; the switch is off. When the gate is more positive, it attracts electrons, inducing an n-type conductive channel in the substrate below the oxide (yellow), which allows electrons to flow between the n-doped terminals; the switch is on.](https://www.flux.ai/p/assets/blogs/mosfet-basics/main.webp) ### Understanding the Fundamentals: MOSFET Basics for Beginners 6 Min Read](https://www.flux.ai/p/blog/understanding-the-fundamentals-mosfet-basics-for-beginners)[ ![Two MOSFET packages on circuit boards, with a green indicator LED.](https://www.flux.ai/p/assets/blogs/nmos-vs-pmos/main.webp) ### NMOS vs PMOS: Differences & When to Use Each 15 Min Read](https://www.flux.ai/p/blog/nmos-vs-pmos)[ ![Two transistor packages mounted on separate circuit boards.](https://www.flux.ai/p/assets/blogs/npn-vs-pnp-transistors/main.webp) ### NPN vs PNP Transistors: Differences & When to Use Each 13 Min Read](https://www.flux.ai/p/blog/npn-vs-pnp-transistors)[ ![Typical schematic diagram of LM741, a classic operational amplifier](https://www.flux.ai/p/assets/blogs/lm741/main.webp) ### LM741 Pinout: A Deep Dive into a Classic Op Amp 4 Min Read](https://www.flux.ai/p/blog/lm741-pinout-a-deep-dive-into-a-classic-op-amp)[ ![An assortment of variable resistors displayed on a dark background with the text 'Variable Resistors' at the top and a circuit symbol for a variable resistor in the center](https://www.flux.ai/p/assets/blogs/6-types-of-variable-resistors/main.webp) ### 6 Types of Variable Resistors: a Detailed Look at Their Uses 5 Min Read](https://www.flux.ai/p/blog/6-types-of-variable-resistors-a-detailed-look-at-their-uses)[ ### Parallel and Series Resistor Calculator 3 Min Read](https://www.flux.ai/p/blog/parallel-and-series-resistor-calculator)[ ![A resistor showing its different color bands](https://www.flux.ai/p/assets/site-cms/643f890cd71a69ee18b71efa_resistor-color-code-calculator.png) ### Resistor Color Code Calculator 4 Min Read](https://www.flux.ai/p/blog/resistor-color-code-calculator)[ ![A comparison illustration of SMT and through-hole PCB assembly technologies](https://www.flux.ai/p/assets/blogs/smt-vs-through-hole/main.webp) ### SMT vs Through-Hole Technology: Which Should You Use? 8 Min Read](https://www.flux.ai/p/blog/smt-vs-through-hole)[ ![A person soldering a circuit board made with Flux](https://www.flux.ai/p/assets/blogs/flux-soldering/main.webp) ### How to Use Flux When Soldering Electronics 12 Min Read](https://www.flux.ai/p/blog/solder-flux-guide-for-soldering)[ ![Different types of toggle switches scattered and a big text - Toggle switch](https://www.flux.ai/p/assets/blogs/toggle-switch/main.webp) ### The Ultimate Guide to Toggle Switches: Types, Uses, and How They Work 3 Min Read](https://www.flux.ai/p/blog/the-ultimate-guide-to-toggle-switches-types-uses-and-how-they-work)[ ![A push button switch soldered on a rigid-flex printed circuit board](https://www.flux.ai/p/assets/blogs/push-button/main.webp) ### What Is the Science Behind Push Button Switches and How They Work 6 Min Read](https://www.flux.ai/p/blog/what-is-the-science-behind-push-button-switches-and-how-they-work)[ ![Tactile Switches: Wiring, Debouncing, and PCB Design](https://www.flux.ai/p/assets/blogs/tactile-switches-guide/main.webp) ### Tactile Switches: Wiring, Debouncing, and PCB Design 8 Min Read](https://www.flux.ai/p/blog/tactile-switches-guide)[ ![Close up of different types of electrical connectors, wire connectors, and solder connectors piled up.](https://www.flux.ai/p/assets/blogs/electrical-connectors/main.webp) ### Electrical Wire Connector Types and Uses 4 Min Read](https://www.flux.ai/p/blog/the-ultimate-guide-to-electrical-connectors-and-wiring-connection)[ ![A selection of low-profile board-to-board connectors on a white background.](https://www.flux.ai/p/assets/blogs/board-to-board-connectors/main.webp) ### Board-to-Board Connectors: Types, Pitch and Stack Height 13 Min Read](https://www.flux.ai/p/blog/board-to-board-connectors)[ ![Temperature probes and a thermistor beside a measurement circuit.](https://www.flux.ai/p/assets/blogs/rtd-vs-thermocouple-vs-thermistor/main.webp) ### RTD vs Thermocouple vs Thermistor: Sensor Selection 14 Min Read](https://www.flux.ai/p/blog/rtd-vs-thermocouple-vs-thermistor)[ ![An illustration of PCB debugging tools and techniques including multimeter, oscilloscope, and thermal imaging](https://www.flux.ai/p/assets/blogs/pcb-debugging-common-issues/main.webp) ### Why Your PCB Is Failing: Debugging Common Issues 7 Min Read](https://www.flux.ai/p/blog/pcb-debugging-common-issues)[ ![555 Timer Guide: Pinout, Operating Modes, and Circuit Examples](https://www.flux.ai/p/assets/blogs/555-timer/main.webp) ### 555 Timer Guide: Pinout, Operating Modes, and Circuit Examples 10 Min Read](https://www.flux.ai/p/blog/555-timer)[ ![Inverting Op-Amp Circuits: Formula, Gain, and Design Examples](https://www.flux.ai/p/assets/blogs/inverting-op-amp/main.webp) ### Inverting Op-Amp Circuits: Formula, Gain, and Design Examples 10 Min Read](https://www.flux.ai/p/blog/inverting-op-amp)[ ![How to Wire a Potentiometer: Pinout, Diagrams, and PCB Examples](https://www.flux.ai/p/assets/blogs/how-to-wire-a-potentiometer/main.webp) ### How to Wire a Potentiometer: Pinout, Diagrams, and PCB Examples 8 Min Read](https://www.flux.ai/p/blog/how-to-wire-a-potentiometer) See All (122) ## Let’s start building. Let’s build your idea together. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. [Try it Free](https://www.flux.ai/signup) ![Close-up of a Flux-designed printed circuit board](https://www.flux.ai/p/assets/homepage-v2/mission-visual.webp)