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Re: Op Amps running Class A?

207.229.148.214

This issue is one of the main reasons the Walt Jung's special combo of Analog Devices AD744 and AD811 (or some other buffer) seems so interesting to me. One of the AD744 compensation pins presents an output signal BEFORE it goes though the internal class B output stage. You can feed this signal into another buffer stage of your choice for power. Why try to bias the output stage into class A with whatever problems that could possibly bring? Just don't even use the internal output stage at all! Walt's circuit takes advantage of the availability of this signal and feeds it into a AD811 high speed, high power video amp. This combo measures quite well and sounds quite good as a line stage or headphone driver. As far as I know, the AD744 is unique in having this output versatility.

Michael


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  • Re: Op Amps running Class A? - mlloyd1 20:52:01 03/27/01 (0)


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