Digital routing switch matrix for digitized radio-frequency...

Electronic digital logic circuitry – Superconductor – Function of and – or – nand – nor – or not

Reexamination Certificate

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C326S038000, C326S093000, C326S006000

Reexamination Certificate

active

11424121

ABSTRACT:
Routing and distribution of radio-frequency (RF) signals is commonly achieved in the analog domain. However, improved performance and simplified circuit architectures may be obtained by first digitizing the RF signal, and then carrying out all routing in the digital domain. A new generation of scalable digital switches has been developed, which routes both the data and clock signals together, this being necessary to maintain the integrity of the digitized RF signal. Given the extremely high switching speeds necessary for these applications (tens of GHz), this is implemented using Rapid-Single-Flux-Quantum (RSFQ) logic with superconducting integrated circuits. Such a digital switch matrix may be applied to either the receiver or transmitter components of an advanced multi-band, multi-channel digital transceiver system, and is compatible with routing of signals with different clock frequencies simultaneously within the same switch matrix.

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D.K. Brock, O.A. Mukhanov, and J. Rosa, “Superconductor Digital RF Development for Software Readio,” IEEE Commun. Maq., pp. 174-179, Feb. 2001.
K.K. Likharev sun V.K. Semonov, “RSFQ logic/Memory Family: A new Josephson junction technology for sub-THz digital systems”, IEEE Trans. Appl. Supercond., vol. 1, pp. 3-28, Mar. 1991.
Hashimoto et al., “Implementation of a 4x4 Switch With Passive Interconnections”, IEEE Trans. Appl. Supercond., vol. 15, No. 2, pp. 356-359., Jun. 2005.

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