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Why voltage divider biasing circuit is the widely used biasing?
Wiki User
∙ 11y ago
In a voltage -divider circuit method for biasing a transistor , we have two resistors R1 and R2 a DC supply voltage VCC and other components like collector resistor , emitter resistor are also present.
here biasing is done by the help of voltage drop across the resistors
to understand the reason behind the extensive usage of voltage - divider method we need to know about the term stability.
Stability factor of a transistor is defined as the ratio of amount of change in collector current to the amount of change in the same collector current with the base open(leakage current due to minority charge carriers)
lesser the stability factor ------ that type of biasing is more desired
the stability factor for voltage divider method is nearly equal to one.
Wiki User
∙ 11y ago
Wiki User
∙ 10y agoVoltage Divider biasing is widely used in amplifier because of its stability factor .it has a good stability then other three type of biasing .
stability factor in VDB (Voltage divider biasing) is
(β+1)(1+RB/RE)
S=------------------------
(β+1)+RB/RE
if RB/RE <<1 then the equation indicates that S=1
it means VDB has a good stability .
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