Function Generator PCB Design

flux

0:00

Work done
  • PCB size reduced to 90 mm × 65 mm.
  • Added and connected test points:
Tasks not executed (requires manual action)
  • Configure bottom copper layer as a solid GND pour with thermal relief.
  • Implement stitching vias and guard polygon around U6 output.
  • Re-route analog nets (ANALOG_IN, RAW_POS, RAW_NEG) for shortest, isolated paths.
  • Widen +12 V, −12 V, +5 V traces to ≥1.0 mm.
  • Re-pour all copper polygons and verify stitching via coverage.
  • Re-position U5, U6, J4 inline, and group U4, J2, J3 away from analog.
  • Add silkscreen labels on critical connectors:
    • J1 (AC in)
    • J2 (LCD header)
    • J3 (Encoder)
    • J4 (OUTPUT) and annotate regions POWER, DIGITAL, ANALOG, OUTPUT.
  • Run ERC/DRC checks and regenerate the routed 2-layer PCB.
Success Criteria Review
  • Bottom ground pour & guard polygon: ❌ not in place.
  • Power trace widths ≥1.0 mm: ❌ not widened.
  • Analog net re-routing: ❌ not updated.
  • PCB size reduction: ✅ achieved.
  • Silkscreen labels & test points: test points placed ✅, labels missing ❌.
  • DRC/ERC pass & PCB regeneration: ❌ not done.
Recommended next steps Proceed to implement the ground pour, stitching vias, guard polygon, power-trace widening, and analog-net re-routing in the PCB layout. Then add silkscreen labels, run ERC/DRC, re-pour polygons, and regenerate the routed board to complete the improvements.
92 days
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    AD9833-Based Function Generator with Multi-Rail Linear PSU and Star-Grounded Analog Output Stage

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