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An amplifier can be used to adapt the range of a signal to a requirement, to make it more robust for transmission, or to satisfy interface requirements (like input/output impedance).

0 votes
1 answer
73 views

Why Am I Not Getting my Expected Output in this basic Op-Amp Circuit?

I thought that A = 1 + Rf/Ri for an op-amp non-inverting amplifier? With a 1mV input, I'm getting output voltages in the uVs... …
Eli Y's user avatar
  • 91
0 votes
1 answer
154 views

Suggestions for Improving this Pre-amp Circuit

I made this preamp circuit for a dynamic mic and am mostly happy with it, but I'd love to get suggestions on how to make it a little better. I'd like it to have as little coloration as possible, and i …
Eli Y's user avatar
  • 91
1 vote
2 answers
143 views

Why am I getting this distortion in this circuit?

Can someone explain to me why I am getting this distortion for the following circuit? Input is a pure square wave. It happens at any input frequency or voltage. I was thinking the output would be a p …
Eli Y's user avatar
  • 91
1 vote
3 answers
399 views

Extremely Noisy Preamp Circuit on Breadboard (EDIT: Oscillation?)

I built a simple circuit (included below) on a breadboard and have been having some trouble with noise. Generally speaking, I get what seems like random noise averaging at about 1.5Vpp. Otherwise, I'm …
Eli Y's user avatar
  • 91