Advanced Qualification · A-002 Advanced components and circuits · A-002-007-004
In the common base amplifier, when the input and output signals are compared:
- A the output signal lags the input signal by 90 degrees
- B the output signals leads the input signal by 90 degrees
- C the signals are 180 degrees out of phase
- D the signals are in phase
Correct answer: D — the signals are in phase. From the official ISED question bank, verified word for word.
Why
In a common base amplifier, the signal enters at the emitter and leaves at the collector, meaning when the input voltage rises, the output voltage also rises immediately without flipping. The full explanation — and one for every question — is in Pro.
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Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.