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What happens to output signal if the transistor is biased in Cut Off?
If the operation point is considered near cut off point, then the amplification will be as under. But for the transistor to function properly as an amplifier, its input circuit (i.e., the base-emitter junction) remains forward biased and its output circuit (i.e., collector-base junction) remains reverse biased.
What are the requirements of a good biasing circuit?
Emitter base junction must be forward biased and collector base junction must be reverse biased. That means the transistor should be operated in the middle of the active region or Q point should be fixed at the centre of the active region.
What happens if a transistor is not biased properly?
If the transistor is not biased appropriately, it may lead to the poor amplification of the signals resulting in the gain being very low.
What happens when there is no bias in a transistor?
This situation can be well mapped to a transistor without proper transistor biasing. Transistor biasing (DC biasing) is the process of providing appropriate DC voltage or current to a transistor for its proper functioning in an electronic circuit. The transistor acts exactly like a dead phone when there is no DC bias.
What is the optimal transistor bias voltage for BJT?
Without transistor biasing, BJT amplifiers fail to deliver the required output across load terminals. The optimum value of transistor bias voltage is equal to two times the required AC output voltage peak. If you vary the transistor bias voltage, the Q-point will also shift its position.
What should the voltage of a transistor be?
The optimum value of transistor bias voltage is equal to two times the required AC output voltage peak. If you vary the transistor bias voltage, the Q-point will also shift its position.
Why is there no loading of the source by biasing circuit?
There is no loading of the source by the biasing circuit since no resistor is connected across the base-emitter junction. It has a poor stabilization, since there is no means to stop the self-increasing collector current due to temperature increase and individual variations.