An op amp circuit that can produce a variable voltage gain from −1 to 1 is called
A) a gain changer.
B) a reverse voltage changer.
C) a sign changer.
D) variable voltage changer.

Question

Quizplus · Accepted Answer

The circuit described is an inverting amplifier with a variable resistor in the feedback loop. By adjusting the resistance, the gain can be varied from +1 to -1, effectively changing the sign of the input signal. Therefore, the circuit is commonly referred to as a sign changer.

An Op Amp Circuit That Can Produce a Variable Voltage