AdvancedA-002-008-010
What is a non-inverting op-amp circuit?
A
Answer
Circuit design and power supplies
Type
A
An operational amplifier circuit connected such that the input and output signals are in phase
B
An operational amplifier circuit connected such that the input and output signals are 90 degrees out of phase
C
An operational amplifier circuit connected such that the input and output signals are 180 degrees out of phase
D
An operational amplifier circuit connected such that the input impedance is held low, and the output impedance is high
Answer Notes
A non-inverting op-amp circuit is created by feeding the input signal into the non-inverting terminal (marked with a plus sign). Because the signal enters this terminal, the output perfectly tracks the polarity of the input signal without flipping it.
This means the input and output signals are exactly in phase (a 0-degree phase difference). When the input voltage rises, the output voltage also rises. Options suggesting 90 or 180-degree phase shifts incorrectly describe circuits like integrators or inverting amplifiers.
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