diode design

general qn how will the circuit act to this will d1 be open ckted can anyone help i am using oa79 diode breakdown is .3

ECG leads generally see voltages in the range of -5mV to 5mV and a frequency range of .05Hz - 150Hz. We are peripherally stimulating the patients with up to 200v at a frequency of 1kHz elsewhere on the body for about 100mSec and it disrupts our front-end ECG chip. I need to protect the ECG leads...

Hi, is there anyone who can help me/guide me to solve the problem? Even if you could recommend me any teacher, senior, book, or paper, it would be of great help to me. I have come up with a dummy solution, but I am pretty sure it's not that accurate (I can show you my answer). I really...