Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Patent
1997-05-22
1998-09-22
Hoff, Marc S.
Coded data generation or conversion
Analog to or from digital conversion
With particular solid state devices
341143, H03M 100
Patent
active
058120785
ABSTRACT:
A low noise accurate signal generator for a calibration system or a radar system includes a generator of a digital data stream having a predetermined frequency spectrum incorporated therein. A series connected array of Josephson junctions is coupled to and excited by the digital data stream to provide a stream of pulses with quantum mechanically accurate time integral. A low pass analog signal filter is coupled to the pulses of accurate time integral for extracting analog signals of the predetermined frequency spectrum. For radar applications, a low phase-noise local oscillator of a fixed RF frequency and the output of the filter are coupled to a signal mixer which outputs low phase-noise chirped RF signals for use in generating transmit pulses for the radar system whereby enhanced detection of targets in "clutter" can be obtained.
REFERENCES:
patent: 4344052 (1982-08-01), Davidson
patent: 5140324 (1992-08-01), Prybysz et al.
patent: 5198815 (1993-03-01), Przybysz et al.
patent: 5272479 (1993-12-01), Silver
patent: 5327130 (1994-07-01), Kang et al.
patent: 5341136 (1994-08-01), Przybysz
patent: 5351049 (1994-09-01), Lee et al.
patent: 5565866 (1996-10-01), Hamilton et al.
"Fundamentals of Giaever And Josephson Tunneling", The New Superconducting Electronics, ed. by Harold Weinstock and Richard W. Ralston, Kluwer Academic Publishers, 1993, pp. 1-28.
"Superconducting-Normal-Superconductor Junctions for Digital/Analog Converters", S.P. Benz, National Institute of Standards and Technology, Boulder, CO 80303.
"Josephson Voltage Standard--A Review", Clark A. Hamilton, Charles J. Burroughs and Samuel P. Benz, National Institute of Standards and Technology, Boulder, CO 80303.
"RF-Induced Steps In A Pulse Driven Josephson Junction", S. Maggi, European Conf. On Applied Superconductivity, Edinburgh 3-7, Jul. 1995, pp. 1-4.
Benz Samuel Paul
Hamilton Clark Allen
Przybysz John Xavier
Worsham Anthony Hodge
Hoff Marc S.
Jean Pierre Peguy
Northrop Grumman Corporation
Sutcliff Walter G.
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