Electronics and Communication Engineering - Analog Electronics - Discussion

4. 

The gain of an FET amplifier can be changed by changing

[A]. rm
[B]. gm
[C]. Rd
[D]. none of the above

Answer: Option B

Explanation:

Gain is proportional to gm .


Shubakara said: (Aug 21, 2014)  
We can change both gm and rm know since A0 = gm ro.

Shailesh Patel said: (Feb 16, 2015)  
I can't understand that answer is wrong or explanation is wrong because both are different.

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