Patent ID: 7129869

Claim:
A superconductor semiconductor integrated circuit which is a circuit having an integrated circuit connecting a single flux quantum analog-to-digital converter front-end circuit, a superconducting amplifier circuit and a semiconductor circuit, and an AC power source driving said integrated circuit, wherein said single flux quantum analog-to-digital converter front-end circuit is a circuit oversampling an analog signal as an input signal and outputting the sampling data as a digital current signal, has a single flux quantum generating circuit connected to said AC power source so that the sampling in said circuit and the output of the digital current signal are synchronized with an AC signal from said AC power source, and has a clock signal frequency multiplier circuit so as to perform sampling at a frequency higher than that of said AC signal, wherein said superconducting amplifier circuit is connected to said AC power source and said single flux quantum analog-to-digital converter front-end circuit so as to amplify the signal from said single flux quantum analog-to-digital converter front-end circuit by the AC signal from said AC power source, wherein said semiconductor circuit is connected to said superconducting amplifier circuit and said AC power source so as to perform digital signal processing of the signal from said superconducting amplifier circuit in synchronization with the AC signal from said AC power source for outputting a digital signal.