When a differential amplifier is not perfectly symmetrical
A) there will be a small ac output voltage.
B) there will be no common-mode amplification.
C) there will be no ac output voltage.
D) there will be 0 V at the output.

Question

Quizplus · Accepted Answer

When a differential amplifier is not perfectly symmetrical, there will be a difference in the amplification of the two input signals. This leads to a small AC output voltage, also known as the "differential-mode" output. This output voltage is proportional to the difference between the two input signals and is the desired output of a differential amplifier. The presence of a common-mode input signal will also lead to a common-mode output voltage, which is unwanted and should be minimized.

When a Differential Amplifier Is Not Perfectly Symmetrical