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Chapter: Electronic Circuits - Biasing of Discrete BJT and MOSFET

Requirements of a 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.

Requirements of a 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.

·        Circuit design should provide a degree of temperature stability.

·        Q point should be made independent of the transistor parameters such as β.

 

To maintain the Q point stable by keeping IC and VCE constant so that the transistor will always work in active region, the following techniques are normally used,

 

1.     Stabilization technique

2.     Compensation technique

 

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Electronic Circuits - Biasing of Discrete BJT and MOSFET : Requirements of a biasing circuit |


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