Question

The effect of the inverting configuration is

(a) The output signal and the input signal are out of phase by 180^o

(b) The output signal and the input signal are in phase

(c) The output phase is leading the input phase by 90^o

(d) The output phase is lagging behind the input phase by 90^o

This question was addressed to me in final exam.

This interesting question is from The Inverting Configuration in section Operational Amplifiers of Electronic Devices & Circuits

Answer 1

The correct choice is (a) The output signal and the input signal are out of phase by 180^o

To elaborate: Inverting introduces a phase shift of 180^o or it ‘inverts’ a peak.