How do I choose a good op amp?
Op amp requirements The ideal op amp, should it ever exist, would have infinite gain, infinite input impedance, zero output impedance, it should have an infinite frequency response, not introduce any noise, and it should be distortion free. Obviously no op amp can meet all these requirements.
Does it matter which op amp I use?
Theoretically, if the inverting and non-inverting inputs of an op-amp are connected together, the output should be zero regardless of the voltage applied to the inputs. Again, perfection cannot be achieved. The input characteristics of the op-amp are important because they must match the signal you want to amplify.
What is the most common op amp?
IC741
IC 741. The most commonly used op-amp is IC741. The 741 op-amp is a voltage amplifier, it inverts the input voltage at the output, can be found almost everywhere in electronic circuits.
Do op amps make a difference?
This helps their real world performance in audio applications because they can reject noise on the power supply, and inputs, much better than most any discrete circuit. High Open Loop Gain – Op amps typically have higher open loop gain. This allows more feedback which in turn lowers distortion.
Why is it important to choose very high gain for an amplifier?
Gain is a measure of how much the amplifier increases the signal level, and is measured in dB as the ratio of the signal power at the amplifier output to the signal power at the amplifier input. In the case of a low-noise amplifier, the high gain will contribute to lowering your overall system noise figure.
Are discrete op-amps better?
Discrete op amps do not have these limitations, and are a vastly superior op amp for amplifying audio signals than their IC counterparts are. They can run much higher power, have much deeper class A bias, and deliver a much more realistic and detailed sound. In short, discrete designs are the best op amp for audio.