When a time varying signal has to be digitized using an ADC, which of – McqOptions

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1.	When a time varying signal has to be digitized using an ADC, which of the following it is necessary to use before digitization?
A.	Time division multiplexer
B.	frequency division multiplexer
C.	sample and hold circuit
D.	Instrument amplifier
Answer» D. Instrument amplifier

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