[sdiy] Driving SSI2144 freq control with PWM from a microcontroller

[Mike Bryant]

> Amusingly, I have a patent on this approach:

https://patents.google.com/patent/US5774084A

> Not the greatest thing ever and it expired a few years ago. Whenever I
> see an argument about how broken the patent system in the US is I think
> of this one.

Definitely broken since I was using the technique at HP in 1984, and no way was I the first to use it :-)


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