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Hardware Design for Biosignal system

This is the 4-layer PCB well designed to avoid powerline noise and EM interference for a biosignal acquisition system.

The System's Specification:

  • Power with 3.7V 1100mAh Lithium Ion Battery (link here)
  • Voltage regulation (3.3V, +2.5V, -2.5V)
  • NRF52832 Microcontroller (Nordic - Cortex M4)
  • ADS1299 Analog Front End
  • Board dimension 74mm x 54mm
  • Development software: Altium Ver 16.1

The System PCB Layer Images

Top layer

Power layer

Ground layer

Bottom layer

3D view