Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Reexamination Certificate
2006-10-31
2006-10-31
Barnie, Rexford (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
With particular solid state devices
C341S126000
Reexamination Certificate
active
07129869
ABSTRACT:
In an A/D converter having a single flux quantum circuit having a flux quantum as an information carrier, a superconducting amplifier circuit driven by an AC current, and a semiconductor circuit, the operations of the circuits are synchronized with each other and a data signal from the single flux quantum circuit is transmitted to the semiconductor circuit.An AC current as the power source of a superconducting amplifier circuit is inputted as a master clock signal to the single flux quantum circuit and the semiconductor circuit to synchronize the operations of the circuits with the master clock signal. The single flux quantum circuit has a clock signal frequency multiplier circuit, a demultiplexing circuit and a memory circuit.
REFERENCES:
patent: 2001/0025012 (2001-09-01), Tarutani et al.
patent: 2002/0060635 (2002-05-01), Gupta
patent: 2001-345488 (2001-03-01), None
patent: 2002-374152 (2001-06-01), None
K. K. Likharev et al., “RSFQ Logic Memory Family: A New Josephson-Junction Technology for Sub-Terahertz-Clock-Frequency Digital Systems”, IEEE Transactions on Applied Superconductivity, vol. 1, No. 1, Mar. 1991, pp. 3-28.
Furuta Futoshi
Saitoh Kazuo
A. Marquez, Esq. Juan Carlos
Barnie Rexford
Fisher Esq. Stanley P.
Hitachi , Ltd.
International Superconductivity Technology Center, the Jurdical
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