Motivated to learn more about discrete circuit design, eventually I stumbled into the wotk of Douglas Self, who is an audio engineering master designer. My synthesizer circuit design goals are quite different than Self’s recommendations, where discrete circuitry tends to have much higher current and voltage output than integrated circuits. Also, synthesizer design is not necessarily one where low-distortion is a requirement. And while it was tempting to explore what is possible with ±24V supplies, my synthesizer applications are not really low-noise mixers and audio amplifiers. Still, witnessing how audio building blocks could be made with an emphasis on current sources and sinks for lower distortion, a number of things from early-2000 work started to gel much better. First, what came were high-performance buffers, improvements upon the Type EF and EF2 designs.
Type F High-Performance Buffer: For AC-coupled applications
Type E High-Performance Buffer: For DC applications, lower Vos
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