reduce gain for transistor

Thread Starter

karas

Joined Sep 8, 2011
207
to reduce gain for transistor we put resistor between base and emitter can someone help me what the effect of R that it lower the gain
thanks
 

vrainom

Joined Sep 8, 2011
126
I'll give you a hint: bipolar transistors' output current (collector-emitter junction) is proportional to the current flowing through the input (base-emitter junction). So if you place a resistor parallel to the input...
 

Adjuster

Joined Dec 26, 2010
2,147
Such a resistor reduces the current gain, but does not stabilise it. For this we normally apply negative feedback.

@ vrainom: Is that nickname in line with the recent Google+ ruling?
 
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