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Sample and hold circuit is a _______ circuit.

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Sample and hold circuit is a _______ circuit.

(a) Analog device

(b) Digital device

(c) Both analog and digital

(d) Neither analog nor digital

This question was addressed to me in a job interview.

The question is from Analog to Digital Converter in portion Sensors of IOT

1 Answer

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Right answer is (a) Analog device

Easy explanation: An input circuit called a sample and hold performs task, most cases by using a capacitor to store the analog voltage at the input, and using an electronic switch or gate to disconnect the capacitor from the input.

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