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feedback to a class AB push pull amplifier

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analog_chip

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Hi,

I have a class AB push pull amplifier shown below. It has single ended input and single ended output.

1.How can I give a resistive feedback and use it.

2.How can i measure input common mode range and output common mode range?

3. How can I measure offset voltage? Is there any significannce of offset voltage in case of single ended input and output?

Thanks

66_1320039435.jpg
 

Hey Dude!
Hi
I think Your circuit is at CLASS B amplifier because your gates has not dc bias for GS. for feed back: do you wanna get negative feedback?
if yes , do you have voltage amplifier in preceding of your power amplifier? and what is the range of your BW?
though for having a negative feed back in this types of amplifiers , you have many simple way.
if your amplifier has voltage driver amplifier out of phase(180 degree) your feed back is very simple. you will can get feed back with a simple voltage devider and one capacitor. and if your amplifier is in phase you can use phase inverting amplifier feed back with a simple op amp or CE amp.
All the best
Goldsmith
 
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