Useful amp design/theory pages

Useful amp design/theory pages:

http://users.ece.gatech.edu/~mleach/lowtim/

http://www.dself.dsl.pipex.com/ampins/dipa/dipa.htm

Thanks PRR,
:? :sad: :idea: :grin: :!: :evil: :?: :idea: :roll: :? :idea: :grin:

Note: both sites focus on loudspeaker amps. But line-level op-amps use similar techniques. Generally you can omit one stage of output buffering when loads are always way above 8Ω. Omitting the big-fat output transistors may allow more GBW. (OTOH, speaker amps generally run at gain of 20, general purpose op-amps often are compensated for unity gain.) And of course voltages are high in high-power loudspeaker amps.

If you take Self's basic plan, reverse polarity (his inputs are PNP not NPN), and lose the big output devices, it is essentially the same as a Jensen 990 in general layout. There are many-many small differences: Self is a simplifier and Deane was a tweaker. Comparison of the two approaches might be illuminating.

Yep, the Self article is full of handy hints and tips.