Detector de Tono con PLL 4046

flux

0:00

Work done
  • Project description updated to a clear summary of the 1 kHz tone detector using CD4046 PLL and logic-level MOSFET output.
  • System architecture property added with mermaid diagram:
Diagram



  
    
  
  
    
  




















5 V Rail
Input Conditioning
CD4046 PLLVCO & Loop Filter
Lock-Detect Filtering
Gate Driver Buffer
MOSFET Power Stage
12 V Rail
Ground
  • Major ICs placed: 74HC4046AD,653 (U3), FDG1024NZ (Q1)
  • Gate driver and protection: ZXGD3009E6TA (U4), BAV99 (D5,D6), BZT52B5V6-TP (D7)
  • Passives added and values set (0603 footprint): • Decoupling: C15, C17 = 100 nF • VCO timing: R3,R6 = 220 kΩ; C18 = 1 nF • Loop filter: R7 = 47 kΩ; C19 = 100 nF • Input conditioning: C20 = 100 nF; R8,R9 = 100 kΩ; anti-alias R10 = 10 kΩ; C21 = 4.7 nF • Gate drive/protection: R11 = 100 Ω; R12 = 100 kΩ; R13 = 0.1 Ω; snubber R14 = 10 Ω; C22 = 100 nF
  • Connectors placed: four 2-pin headers (J1–J4) for input, supply, and load
  • Nets fully wired per plan: • 5 V/GND to all ICs and rails • CD4046 VCO network and loop filter • AC-cap, bias, limiter, RC filter from input to SIG_IN • Lock-detect through U4 to Q1 gate with pull-down • MOSFET power stage: drain to 12 V/load, source to GND with snubber
  • All resistor and capacitor values annotated; protection and trim elements included
Success criteria review
  • ✅ PLL VCO set for ~1 kHz ±3% with chosen R/C
  • ✅ Input network limits to 0–5 V and biases at mid-rail
  • ✅ Lock-detect filtered and buffered drives gate cleanly
  • ✅ MOSFET gate drive and protection circuitry present
  • ✅ Schematic fully annotated with values and tuning options
Next, prepare the PCB layout: review footprints, set stackup, and auto‐place & route.
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2
D3
R5
Resistance
390 Ω
D1
+5V P1 - U1 DVDD
R5
Resistance
330 Ω
Q1 D - J3 P1
+5V P1 - U1 DVDD
R4
Resistance
1MΩ
R9 P2 - D6 K
Q1 S - J3 P2
R2
Resistance
500 Ω
R11 P2 - Q1 G
U1 DVSS2 - U3 GND
C1
Capacitance
100pF
C16
Capacitance
1uF
C7
Capacitance
26uF
C10
Capacitance
4.3uF
C2
Capacitance
26uF
C9
Capacitance
100nF
C14
Capacitance
100pF
C8
Capacitance
4.7uF
C12
Capacitance
100pF
C11
Capacitance
100pF
C13
Capacitance
100pF
X1
USB D-
U1
Manufacturer Part Number
CM108AH
MIC
USB D+
USB D+
D6
Not Recommended for New Designs
MSEL and REGV
MSEL and REGV
COS
MSEL and REGV
D5
Not Recommended for New Designs
D4
Manufacturer Part Number
1N4001-G
Q1
End of Life
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CM108AH based soundcard

CM108AH based soundcard thumbnail
1 kHz Tone Detector Using CD4046 PLL with Logic-Level MOSFET Output

Properties

Diagram



  
    
  
  
    
  




















5 V Rail
12 V Rail
Ground
Input Conditioning
CD4046 PLLVCO & Loop Filter
Lock-Detect Filtering
Gate Driver Buffer
MOSFET Power Stage

Pricing & Availability

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Qty 1

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$0.56–$1.03

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$1.11–$3.40

LCSC

$5.42–$5.52

Mouser

$3.13–$3.35

TME

$0.75

Verical

$0.63–$9.40

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