Sallen Key

Ah, all the more so then -- also one of the first "it works on paper" engineers, the period equivalent of the CAD designer? :^)

Many things we owe to Heaviside too, of course; the modern language of vector calculus for example.

Tim

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Seven Transistor Labs, LLC 
Electrical Engineering Consultation and Design 
Website: https://www.seventransistorlabs.com/
Reply to
Tim Williams
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Good book:

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

Which s --> z mapping do you use for that?

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Rich
Reply to
RichD

Nothing so fancy. I just looked at the schematic of an analog filter and wrote the code.

Here's one, a simple 4-pole bessel in 68K assembly.

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One engineer got absolutely angry when I did this. He was trying to do a textbook butterfly filter and the coefficients were unworkable.

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

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