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Question
A transistor is used in common emitter mode as an amplifier. Then:
A transistor is used in common emitter mode as an amplifier. Then:
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Solution
Transistor:
- When a transistor is used as an amplifier in common emitter mode, the base-emitter junction serves as the input junction and the collector-emitter junction serves as the output junction.
- Applying forward voltage to the input junction causes it to be forward biased, and applying reverse voltage causes it to be reverse biassed.
Therefore, the emitter-base junction is forward completely biased when utilizing a transistor as just a common emitter amplifier, and the signals to be amplified are linked mostly in the emitter-base circuit.
Transistor:
- When a transistor is used as an amplifier in common emitter mode, the base-emitter junction serves as the input junction and the collector-emitter junction serves as the output junction.
- Applying forward voltage to the input junction causes it to be forward biased, and applying reverse voltage causes it to be reverse biassed.
Therefore, the emitter-base junction is forward completely biased when utilizing a transistor as just a common emitter amplifier, and the signals to be amplified are linked mostly in the emitter-base circuit.
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