Q8Analog Circuits
Question
2 marks
Differentiate between integrator and differentiator.
Answer
Integrators output the integral of the input and act as low-pass filters; differentiators output the derivative and act as high-pass filters.
- Integrator: An op-amp circuit with a capacitor in the feedback loop. Its output voltage is proportional to the time-integral of the input voltage. It acts as a Low-Pass Filter and can convert a square wave into a triangular wave.
- Differentiator: An op-amp circuit with a capacitor at the input. Its output voltage is proportional to the time-derivative (rate of change) of the input voltage. It acts as a High-Pass Filter and can convert a triangular wave into a square wave.