Abstract
Recently we reported a direct time jitter measurement, obtained using a ring-like Josephson transmission line (JTL). The jitter value of 0.2 ps/ n ( n––number of junctions in JTL) was obtained for the circuit that was fabricated using the 1 kA/cm 2 Hypres process. In this paper, we report the following investigation of the noise impact on rapid single flux quantum circuits in general, and particularly on two types of clock recovery circuits. The study explains the previously obtained results and shows that a wide frequency band clock recovery unit can be made using 50-junctions and a low-yield high-temperature superconductor technology and operating at 50 K. This approach would relatively easily enable us to implement such a circuit using the packaging of Conductus' commercial products for the wireless industry, which include a cryo-cooler, low noise amplifiers, and a high-frequency interface.
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