Superconducting analog-to-digital converter with a triple-juncti

Details Superconducting analog-to-digital converter with a triple-juncti Superconducting analog-to-digital converter with a triple-juncti

1991-12-27

1993-07-13

Logan, Sharon D.

Coded data generation or conversion

Analog to or from digital conversion

With particular solid state devices

341171, 307277, 307476, H03M 100, H03M 120

Patent

active

052277925

ABSTRACT:
A high-performance superconducting analog-to-digital (A/D) converter providing high-speed, high-resolution A/D conversion with low power consumption. The superconducting A/D converter of the present invention includes a bidirectional binary counter having n stages of triple-junction reversible flip-flops, where n is the number of bits of the digital output, and a pair of superconducting inductors for inductively coupling an analog input current to the bidirectional counter. The bidirectional counter algebraically counts incremental changes in the analog input current, increasing the binary count for positive incremental changes in the analog current and decreasing the binary count for negative incremental changes in the analog current. The bidirectional counter requires no gate bias, thus requiring minimal power for operation.

REFERENCES:
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patent: 5012243 (1991-04-01), Lee
patent: 5019818 (1991-05-01), Lee
Fulton, T. A. et al., "The Flux Shuttle-A Josephson Junction Shift Register Employing Single Flux Quanta," Proceedings of the IEEE, vol. 61, No. 1, Jan. 1973, pp. 28-35.
Clarke, John, "The Application of Josephson Junctions to Computer Storage and Logic Elements and to Magnetic Measurements," AIP Conference Proceedings, No. 29, 1976, pp. 17-22.
Likharev, K. K., "Dynamics of Some Single Flux Quantum Devices: I. Parametric Quantron and II. Inhomogeneous Flux Shuttle," IEEE Transactions on Magnetics, vol. MAG-13, No. 1, Jan. 1977, pp. 242-247.

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