Superconducting digital mixer
US7680474B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Nov 14, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Digital mixers which permit mixing of asynchronous signals are constructed of Rapid Single Flux Quantum (RSFQ) logic elements. The logic elements may include an RSFQ non-destructive readout cell (NDRO), an RSFQ D flip-flop, an RSFQ XOR circuit, and an RSFQ T flip-flop. A binary tree arrangement of T flip-flops can be used to provide in-phase and quadrature phase-divided replicas of a reference signal. The mixing elements can be either an XOR circuit, a dual port NDRO circuit functioning as a multiplexer or an RS type NDRO functioning as an AND gate. The RSFQ logic elements utilize Josephson junctions which operate in superconducting temperature domains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.