3 ms·
The design of an amplifier stage often looks like this: https://toshiba.semicon-storage.com/us/semiconductor/knowledge/faq/linear_opamp/why-is-feedback-used-in
by mlyle 3y ago
The design of an amplifier stage often looks like this:
https://toshiba.semicon-storage.com/us/semiconductor/knowledge/faq/linear_opamp/why-is-feedback-used-in-op-amps.html https://toshiba.semicon-storage.com/us/semiconductor/knowled...
Where the triangle isn't perfectly linear. If any RF gets into the output, it can be converted to audio frequencies by the nonlinearity and amplified. The open loop gain of the amplifier component can increase the magnitude of signals like this by tens of decibels.
- searealist 3y agoAnd yet in real consumer hardware this is never an issue. Do you just like wasting people’s time?
- LoganDark 3y agoIf noise gets into the pre-amplified signal then it won't matter which wire you use to connect the speakers. This is why ground loops are bad.
- mlyle 3y ago> If noise gets into the pre-amplified signal Nah-- it's about high frequency noise getting in via the speaker lead, and coupling to the negative feedback of the amplifier stage, and getting rectified and amplified. Yes, most interference is via line level inputs, but it can easily be via the "output" as well.