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SUPERCONDUCTOR TECHNOLOGY has offered tremendous promise in analog and digital high-frequency circuits for several decades. One of the pioneers in the technology, HYPRES, Inc. (Elmsford, NY) is still active in the development of high-performance circuits and devices for commercial and military applications. In particular, the company offers a technical paper on its website entitled "Two-Phase 50 GHz OnChip Long Josephson Junction Clock Source," which details a linear long Josephson Junction (LJJ) linear oscillator capable of serving as a clock oscillator in high-speed systems requiring extremely low jitter.
The oscillator is based...