Op-amp differentiator

An op-amp differentiator or a differentiator amplifier is a circuit configuration which is inverse of the integrator circuit. It produces an output signal where the instantaneous amplitude is proportional to the rate of change of the applied input voltage.

1. What is the purpose of differentiator?
2. What is differentiator and how it works?
3. What is the difference between an op-amp integrator and differentiator?

What is the purpose of differentiator?

In ideal cases, a differentiator reverses the effects of an integrator on a waveform, and conversely. Hence, they are most commonly used in wave-shaping circuits to detect high-frequency components in an input signal. Differentiators are an important part of electronic analogue computers and analogue PID controllers.

What is differentiator and how it works?

The differentiator circuit outputs the derivative of the input signal over a frequency range based on the circuit time constant and the bandwidth of the amplifier. The input signal is applied to the inverting input so the output is inverted relative to the polarity of the input signal.

What is the difference between an op-amp integrator and differentiator?

A differentiator circuit produces a constant output voltage for a steadily changing input voltage. An integrator circuit produces a steadily changing output voltage for a constant input voltage.