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A superconductive tapped delay line, circuits comprising superconductor-insulator-superconductor (SIS) mixers, an L-C integrator, and a tunnel junction comparator, and superconductive digital address encoders have been integrated into a 14-channel analog signal correlator. This 25*38 mm circuit was fabricated using a Nb/Nb/sub 2/O/sub 3//Pb tunnel junction process. Preliminary testing of this device indicates the ability to process long duration, wideband waveforms with time-bandwidth products equal to 6000.
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Green et al. (1991) studied this question.
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