Transistor - Fixed Bias with Emitter Resistor

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01:59:54

To control beta with a fixed-bias transistor, we add a resistor to the emitter.  This provides negative feedback to counter a surge in collector current should a change in Beta happen.

However, for this circuit to be completely independent of beta, either the base resistor needs to be very small or the emitter resistor very large. A larger emitter resistor needs a larger power supply as a result, and a low base resistor needs a independent low voltage power supply.

published 11 years ago

sivajiganesh

7 years ago

Nice ...

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