• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

differential cascode patented in 2007

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#21
smoking-amp said:
My confusion likely on the Darlington patent:

I found an old post by myself about seeing a Sziklai tube/SS circuit (a PNP at the plate, versus the NPN at the cathode for the Darlington) patent. And then hoping that the Darlington was not patented too. So I must have confused the two versions. Sorry for the confusion.
Click to expand...

The darlington schem has been discussed before (triodelington). It's an intriguing concept that I've been playing around with and refining for a while now. I hope there is no active patent on it as well 🙂
 
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