In other words, the fulfilment of these conditions will ensure that transistor operates between the active region of the output characteristics i.e. On the other hand, condition (3) ensure that base-collector junction shall remain properly reverse biased at all times. The condition (1) and (2) ensure that base-emitter junction shall remain properly forward biased during all parts of the signal. Minimum proper collector emitter voltage at any instant. Minimum proper base emitter voltage at any instant.To achieve faithful amplification the following basic condition most be satisfy : The theory of a transistor suggests that it will function properly if its input circuit (that is base-emitter junction) is forward biased and the output circuit (that is collector-base junction) is reverse biased at all times. The basic purpose of biasing is to keep the base emitter junction forward biased and collector base junction is reverse biased, during the application of signal.ĭuring amplification the magnitude of signal should increase and there should be no change in signal shape, this increase in magnitude of the signal without any change in shape is known as faithful amplification. Due to VCB, the junction at the base-emitter gets forward-biased.Transistor biasing is required for proper operation of transistors in any circuit. The value of the zero signal of the current at the base can be determined by the voltage applied at the junction in between the terminals collector and base (VCB) instead of VCC. This method has a resistor at the base such that one end of it is connected to the terminal base whereas the other end will be connected to the collector. Transistor Biasing with Collector-Feedback Resistor
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