When troubleshooting a multiple stage CS amplifier, signal tracing reveals a significant amount of signal voltage at the source of the first stage. The most likely problem is
A)an open coupling capacitor from signal source.
B)too much dc supply voltage.
C)a shorted load in third stage.
D)an open source bypass capacitor.

Question

Quizplus · Accepted Answer

An open source bypass capacitor in a common-source (CS) amplifier stage would lead to a significant amount of signal voltage appearing at the source. This is because the bypass capacitor is normally used to provide a low impedance path for the AC signal, effectively grounding the source for AC signals and maximizing gain. If it's open, the AC signal is not bypassed to ground, leading to increased signal voltage at the source.

When Troubleshooting a Multiple Stage CS Amplifier, Signal Tracing Reveals