transistor biasing circuit explanation

 Transistor biasing

what is transistor?

     A transistor consists of two pn junction formed by sandwiching either p-type or n-type semiconductor pair of opposite types.

     There are two types of transistors names 

1. n-p-n transistor
2. p-n-p transistor

transistor biasing:

    The basic function of transistor is to do amplification.so first we give a weak signal to the base of transistor and amplified output is obtained in the collector circuit.

    The proper flow of zero signal collector current and the maintenance of proper collector-emitter voltage during the passage of signal is known as Transistor biasing.

faithful amplification :

    The process of raising the strength of a weak signal without any changes in its general shape .This process is known as faithful amplification.

    This process is revealed that it will function properly if its input circuit base emitter junction is forward biased and output circuit of collector base junction remains reversed biased.

    The following basic condition must be satisfied

1. proper zero signal collector current.
2. Minimum proper base-emitter voltage (Vbe)at any instant.
3. Minimum proper collector-emitter voltage (Vce) at any instant.   

     The basic purpose of transistor biasing is keep the base-emitter junction properly forward biased and collector base junction is properly reverse biased during the application of signal.this is can be achieved with a bias battery or associationg a circuit with a transistor.