Re: Voltage -Divider Biased transistor circuit


<RR302@xxxxxxxxxxx> wrote in message
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On Mar 19, 1:47 am, "Homer J Simpson" <nob...@xxxxxxxxxxx> wrote:
<R...@xxxxxxxxxxx> wrote in message

news:1174270244.194949.55500@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

i am trying to find resistors values R1 and R2 in a voltage divider
biased transistor circuit.
the following info is given: Vcc=+24 volts, Rc=680
ohms(collector),Re=47ohms(emitter).

How many mA current?

It is desired to have the Q-point set to approx. 20 mA of collector
current

That will give you the voltage across the emitter resistor. Add about 0.1
volts to that and that's where the base voltage should be. That's your
starting point.




.

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