3 ms·
You are correct, but an RC circuit is part of the amplifier circuit and you can do a lot to improve the signal to noise ratio (SNR) depending on frequencies/sig
by dingdongditchme 4mo ago
You are correct, but an RC circuit is part of the amplifier circuit and you can do a lot to improve the signal to noise ratio (SNR) depending on frequencies/signals are trying to amplify versus the ones you want to filter out.
- denotational 4mo agoI see, so you want to band-limit the noise, and are willing to accept potentially raising the noise floor in the band-limited range, the idea being that if the original noise is sufficiently broad-band, this will still increase SNR?
- olsondv 4mo agoNoise doesn’t have to be broadband. 60Hz is a common noise in US from the AC line frequency. Then there are harmonics of that due to rectifiers.
- denotational 4mo agoFair enough: I was reading the original comment as referring to (thermal) noise intrinsic to the amplifier design itself (as opposed to noise due to imperfections in DC supply or due to coupling with some external transmitter), but this makes more sense, and we should consider the whole system anyway.