Chapter 42Crossover displacement
A new kind of amplifier (Electronics World, November 2006)
Now that’s more like a proper title. Yes, I chose it myself.
Like several of the ideas described in these articles, this one goes a good deal further back than you might think. The germ of the idea was formed in 1976. At that time, there was a popular quad opamp called the LM324, which was an economical way of deploying four opamps, but which in audio applications gave a fairly pitiful distortion performance due to its markedly asymmetrical load-driving capabilities.
A useful way of easing this situation was to connect a resistor between the opamp output and the +V supply rail, and it was standard design procedure during my time at Electrosonic. Forty ...
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