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The patent for negative feedback was rejected as "another perpetual motion machine" - I’d never heard this! Do you have a reference so I can read more?
by TomWhitwell 4y ago
The patent for negative feedback was rejected as "another perpetual motion machine" - I’d never heard this! Do you have a reference so I can read more?
- HPsquared 4y ago"Inventing the Negative Feedback Amplifier", IEEE Spectrum (Dec 1977) https://wiki.epfl.ch/me412-emem-2020/documents/06501721.pdf https://wiki.epfl.ch/me412-emem-2020/documents/06501721.pdf The difficulty with the patent office is on the last page.
- exDM69 4y agoI read about this story in Horowitz, Hill : "The Art of Electronics" chapter on negative feedback. You can find an old edition freely available here: https://archive.org/details/TheArtOfElectronics/Vol-1/mode/1up https://archive.org/details/TheArtOfElectronics/Vol-1/mode/1...