Define OP-Amp Integrators and Differentiators

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- A circuit that performs the mathematical integration of input signal is called an integrator. The output of an integrator is proportional to the area of the input waveform over a period of time. A circuit that performs the mathematical differentiation of input signal is called a differentiator. The output of a differentiator is proportional to the rate of change of its input signal. Note that the two operations are opposite.

- Fig.9.9 shows OP-amp integrator and differentiator. As you can see, the two circuits are nearly identical in terms of their construction. Each contains a single OP-amp and an RC circuit.
- However, the difference in resistor/capacitor placement in the two circuits causes them to have input/output relationships that are exact opposites. For example, if the input to the integrator is a square wave, the output will be a triangular wave as shown in Fig. 9.79 (i). However, the differentiator will convert a triangular wave into square wave as shown in Fig. 9.79 (ii).

Wilfykil answered the question on August 16, 2019 at 11:46

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