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reduce gain for transistor

K

Thread Starter

karas

Joined Sep 8, 2011
211
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

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

Adjuster

Joined Dec 26, 2010
2,148
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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