amdx wrote: : I ran across a site that has osc. experiments. : The guy built an oscillator that starts and runs at : 5.5mv (0.0055V) and runs at 800hz. : He worked his way down from around 50mv. : Anyone think they can beat 5.5mv? :-)
A Josephson oscillator generates approximately half-GHz per microvolt, and they are useable at 4.2K perhaps down to that one-uV bias. A HiTc JJ would generate about 2.65 teraHz at 5.5mV bias voltage - a colleaque actually uses one to illuminate a THz detector.
This is cheating (a sort of) really - the original FET circuit you referred to is clever and inspiring.
Regards, Mikko