# transistor gain

Discussion in 'General Electronics Chat' started by vijaytej, Jan 22, 2015.

1. ### vijaytej Thread Starter New Member

Jan 11, 2015
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0
how can we find the voltage gain of a certain transistor if we are using it as a amplifier.What I mean is to design an amplifier circuit in an accordance with the gain.can you please help........

2. ### ErnieM AAC Fanatic!

Apr 24, 2011
7,386
1,605
A transistor does not have a voltage gain, it has a current gain, and that gain is highly variable depending on the current thru it, the temperature, how this exact transistor was made, the phase of the moon, ect.

To deal with all that circuits are designed to work with a wide variation in gain, usually above some minimum.

So the first question is: in what circuit does this transistor reside?

3. ### crutschow Expert

Mar 14, 2008
12,976
3,220
In short, the gain of a transistor amplifier depends upon the circuit design.

4. ### #12 Expert

Nov 30, 2010
16,248
6,744
Nobody designs a transistor amplifier to run at the gain of the transistor because it will have lots of distortion. You use resistors to force a certain amount of gain for your circuit and expect the transistor to behave nicely because it is not being pushed to its limits.

cabraham likes this.
5. ### shteii01 AAC Fanatic!

Feb 19, 2010
3,377
494
$Gain=\frac{Output}{Input}
$

Lets see some numbers.