A coupling capacitor couples an ac signal into an amplifier without disturbing its operating point.

Question

Quizplus · Accepted Answer

A coupling capacitor blocks the DC component of the input signal, allowing only the AC component to pass through to the amplifier. This prevents any shift in the amplifier's operating point, which is determined by the DC voltage at its input. Therefore, a coupling capacitor can couple an AC signal into an amplifier without disturbing its operating point.

A Coupling Capacitor Couples an Ac Signal into an Amplifier