Circuit Block Diagram
Ground
❤️
Patient(Signal)
SPD
Clamp
⚡ Diverting
BioAmp
Gain: 1000x
Simulation Controls
SPD Protection
Enable surge clamping
How it works: The SPD monitors the incoming voltage. Normal biological signals (mV range) pass right through. If a massive surge occurs (e.g., thousands of Volts), the SPD becomes highly conductive, "clamping" the voltage to a safe level and diverting the dangerous excess current to ground, saving the amplifier.
Digital Oscilloscope
CH1: Raw Input (Patient) | Scale: ±1000 mV
CH2: Protected Input (To Amp) | Scale: ±10 mV