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need help to design FET based amplifier

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godfreyl said:
Sorry, I think I made a mistake.


When I saw that, I understood that you already know how to design circuits with BJTs and opamps. I thought that you only need to learn the difference between FET design and BJT design.

But now I see that you asked the previous day how to design a circuit with BJTs and opamps, so perhaps you do not know how to do that either?
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its not like that i know how to design but i always expect nice design may come from different people.FET design knowledge really i don't know.
 

goldsmith said:
Hence the THD will increase and the efficiency will decrease
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goldsmith said:
whey when i used a complementary with mosfet , this event happened ? i used IRFZ44N and IRF9540 . and many other types of mosfets
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goldsmith said:
It is exactly what i want know , that why when i designed my own it had this problem and when i added a resistor the problem solved as well
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If you show the circuit that you used, we can help to find the problem with it.
 

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