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Is differentiator a high pass filter?

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Is differentiator a high pass filter?

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High-pass RC circuit as Differentiator:
The High-pass RC circuit is also known as a differentiator. The name high pass is so called because the circuit blocks the low frequencies and allows high frequencies to pass through it. ... Thus if a d.c. or constant input is applied to such a circuit, the output will be zero.

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