Electronic digital logic circuitry – Superconductor – Tunneling device
Reexamination Certificate
2007-06-29
2009-08-04
Le, Don P (Department: 2819)
Electronic digital logic circuitry
Superconductor
Tunneling device
C326S006000
Reexamination Certificate
active
07570075
ABSTRACT:
Supercooled electronics often use Rapid Single Flux Quantum (RSFQ) digital circuits. The output voltages from RSFQ devices are too low to be directly interfaced with semiconductor electronics, even if the semiconductor electronics are cooled. Techniques for directly interfacing RSFQ digital circuits with semiconductor electronics are disclosed using a novel inverting transimpedance digital amplifier in conjunction with a non-inverting transimpedance digital amplifier to create a differential transimpedance digital amplifier that permits direct interfacing between RSFQ and semiconductor electronics.
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patent: 2007/0052441 (2007-03-01), Taguchi et al.
Mukhanov et al., Josephson Output Interfaces For RSFQ Circuits, IEEE Transactions on Applied Superconductivity, vol. 7, No. 2, Jun. 1997.
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.
Gupta Deepnarayan
Inamdar Amol
Hypres, Inc.
Le Don P
Milde & Hoffberg LLP
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