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Operational Amplifiers

Q1: A circuit that uses an amplifier with passive filter elements is called a(n):

A relaxation oscillator

B signal generator

C differential amplifier

D active filter

ANS:D - active filter

Active filter uses passive filter such as RC filter (can be LP or HP) in their network combined with an amplifier.

Relaxation Oscillators, Signal Generators and Differential Amplifiers also uses passive elements such as Resistors and Capacitors in their networks but not in a form of a RC filter (Passive Filter).



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