Question

Chopper input dc amplifiersare preferred for low level inputs to instrumentation systems because of their high sensitivity, negligible drift and excellent common mode rejection capability.

(a) True

(b) False

This question was addressed to me in a national level competition.

This key question is from Preamplifiers in division Recording System of Biomedical Instrumentation

Answer 1

Correct option is (a) True

For explanation: True. Chopper input dc amplifiersare preferred for low level inputs to instrumentation systems because of their high sensitivity, negligible drift and excellent common mode rejection capability. Their high frequency response is limited to about one half of the input chopper frequency.