/diy/ - Do It Yourself

>>858855

It's not my circuit that's drawing 18mA, that's the rated quiescent current of the amplifier.

I'm looking into non-contact ECG electrode design; low input capacitance/high input impedance is preferable because it minimizes low-frequency voltage noise from current noise integration (which is non-negligible since you're measuring a microvolt signal off of a high-impedance node) and also reduces noise from impedance variation due to electrode movement.

I'd prefer it to be low-power because the amplifier has to be built into the electrode, and 60 milliwatts * 10 electrodes of heat dissipation strapped to your chest seems less than ideal.