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|19th May 2010, 05:19 PM||#1|
Join Date: Dec 2009
I woud like to know more about the next choice I need to make for an OPS design.
It will be a class B amp thats for sure.
1) BJT or MOSFET ? It would be MJ15003/4 in the first case or 2SJ162/2SK1058 in the mosfet case.
2) What topology? emitter follower / source follower or Complementary feedback or triples or ... ?
3) In all cases how do link the OPS best to the VAS? Bufferstage? What driver or predriver components to use?
Where do I have to watch out for !?
The first part of the amp is high end no compromises : mirror image, current mirror, darlington + cascoded VAS with Temporal Miller Compensation and a CMCL to solve the VAS Iq setting which will be set at around 20mA....output power will be set for around 250W into 8ohms and able to run 4ohm loads too.
I thought this info might be important to know if one has to choose an OPS config.
I hope to receive founded information but mere opinions are welcome too but in that case state clearly it is an opinion...
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