AdvancedA-002-008-009
What is an inverting op-amp circuit?
B
Answer
Circuit design and power supplies
Type
A
An operational amplifier circuit connected such that the input and output signals are 90 degrees out of phase
B
An operational amplifier circuit connected such that the input and output signals are 180 degrees out of phase
C
An operational amplifier circuit connected such that the input impedance is held to zero, while the output impedance is high
D
An operational amplifier circuit connected such that the input and output signals are in phase
Answer Notes
An inverting op-amp circuit is configured by applying the input signal to the op-amp's inverting terminal (marked with a minus sign). This configuration results in an output signal that is a magnified, inverted replica of the input.
In AC circuits, this inversion translates directly to a 180-degree phase shift. When the input signal swings positive, the output swings negative by a proportional amount. Distractors suggesting a 90-degree shift or an in-phase relationship describe other circuit types.
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What is a non-inverting op-amp circuit?