a very simple op amp circuit with some detail omitted If you open this circuit in the Falstad simulator, you’ll see two sliders to the right where you can tweak the input voltage. If you make ...

What I’d stumbled upon was a chopper amplifier, a slightly ungainly and long superseded solution to the problem of DC amplification from the days before ubiquitous integrated circuit op-amps.

This is not always the case with all types of amplifiers. It may be desirable to have the transistor conducting for only a portion of the input signal The portion of the input for which there is an ...