What is a voltage divider biasing?
Biasing-Application of suitable DC voltages to operate our
amplifiers in desired region of operation(say active or saturation
or cut-off region) complying our needs.However in order to maintain
a constant Q point irrespective of various external factors,hence
it again comes to the need for biasing that compensates the change
in external factors suitably thereby maintaining a constant
Q-point. Voltage divider bias or self bias is a process of suitably
biasing amplifier by connecting two resistors in series in the
answer. By proper selection of resistors R1 and R2, the operating
point of the transistor can be made independent of β.