Hi

I have attached a picture of a part of a circuit, with which I dont understand how C210 suppresses radio frequency, because it is connecting between positive and negative terminal of channel 1.



Thanks in advance

First of all, thank you for your reply.

This is a protection circuit between the electrode which is attached to human being and amplifier circuit. The original statement claims that the capacitor suppresses radio frequency, which I think your assumption is right (because I was thinking it is acting like a bypass capacitor).

However, I don understand your statement,
" the connection between the positive and negative nodes allows for a virtual ground"

Can you please explain it further?

Thank you very much for your reply again, is very well explanation.

If you don't mind, would you please also have a look of my second question?

http://www.designers-guide.org/Forum/YaBB.pl?num=1293540714/0