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Old 30th March 2007, 03:32 PM   #11
thanh is offline thanh  Viet Nam
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Hi PhongVuTuan!
If my mind is not wrong, amplifier_guru said that " VAS have a high gain and a lot of noise will destroy space of sound...."
Differential VAS has a big gain but CMRR is also high.
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Old 30th March 2007, 03:59 PM   #12
PhongVuTuan is offline PhongVuTuan  Viet Nam
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Default re thanh thanh

Now I got the reason why you like differential approaches. In some instances you are right.

I think that the attached schematic is a class A amp. The other reference is a big amp with a new idea to heighten transistors characteristics.

Now you can type 2sc2922, and search image on google, you will find a more differential amp circuit.

I don't mean to talk you other wise, just go ahead with your approach and you will see very soon why are people don't prefer differential and why there exits a DestroyX amp. Now I will stop my coverage here.
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