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Results tagged with operational-amplifier
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user 36307
Questions relating to the construction and applications of operational amplifiers, which are DC-coupled, high-gain electronic voltage amplifiers with a differential input and, usually, a single-ended output.
3
votes
Can the input of the op amp be 1kV? and can Oscilloscope read such high voltage?
The usual way to get an oscilloscope to deal with 1000V is to use a 100:1 probe. The probe needs a voltage rating above the voltage being measured. A 2kV 100:1 probe is commonplace. It divides the 100 …
- 1,799
2
votes
Accepted
Output resistance of non-inverting amplifier
Your analysis will work when the output is forced to 1V instead of 0V. I was able to get the correct answer (output impedance is indeed lowered by loop gain!) by analyzing a 1V voltage source on the o …
- 1,799
5
votes
Why do (microphone) preamp designs tend to limit opamp gain to max 60 dB?
In addition to the other excellent answers about gain-bandwidth product, there is another problem. With too much gain, the input op amp can saturate due to the input offset voltage. Many mixer boards …
- 1,799
0
votes
Accepted
In solving an op amp problem with two voltage sources, why can't we combine it?
There is a way to combine the solutions for the the two voltage sources using the Superposition Principle, which works for ideal opamp problems because they are Linear Systems.
Here is the general p …
- 1,799