# Important Questions of Differentiator – Integrator Circuit

In this post, some of the important questions of differentiator and integrator is given. It includes differentiate circuit, conditions for differentiate circuit, integrating circuit, conditions for integrating circuit and output of differentiate and integrating circuit.

## Differentiate Circuit

What do you mean by differentiate circuit?

Differentiate circuit

• It is circuit in which the output is directly proportional to differentiation of the input waveform.

What should be condition to be satisfied for differentiate circuit?

Necessary condition for differentiate circuit

• The capacitive reactance should be 10 or more times than the resistance at the operating frequency.
• The time period of the input waveform should be more than the time constant of the RC circuit.

### What is output of the differentiate circuit for the following input?

DC, Sinusoidal waveform, square waveform, Triangular waveform.

Input – Output

• DC – Zero
• Sinusoidal waveform – Cosine waveform
• Square waveform – Sharp narrow pulses
• Triangular waveform – Rectangular waveform

## Integrate Circuit

What do you mean by the integrating circuit?

Integrating circuit

• It is circuit in which the output is directly proportional to integral of the input waveform.

### What should be condition to be satisfied for integrating circuit?

Necessary condition for integrating circuit

• The value of the resistance should be 10 or more times than the capacitive reactance at the operating frequency.
• The time period of the input waveform should be very small than the time constant of the RC circuit.

### What is output of the integrating circuit for the following input?

Sinusoidal waveform, rectangular waveform, square waveform

Input – Output

• Sinusoidal – Cosine
• Rectangular – Triangular
• Square – Triangular

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