need help to design FET based amplifier

[harikrishnam]

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?

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.

 

[godfreyl]

Hence the THD will increase and the efficiency will decrease

whey when i used a complementary with mosfet , this event happened ? i used IRFZ44N and IRF9540 . and many other types of mosfets

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

If you show the circuit that you used, we can help to find the problem with it.