Single flux quantum series biasing technique using superconducting DC transformer
US6483339B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2001 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Aug 22, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/1952
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The level of bias current (12) required by a superconductor integrated circuit (2 & 4) is lowered by separating the circuit into portions having separate ground planes and supplying the bias current to the circuit portion (2) in one ground plane in series (10) with that for the circuit portion (4) in another ground plane. To maintain DC isolation between those circuit portions, SFQ pulses inputted (SFQ IN) move across the separate ground planes through a pair of inductively coupled SQUIDS (3 & 5) that define a DC transformer; and a combiner (7) reconstitutes and outputs the SFQ pulses. To provide inductive coupling the DC transformer includes a primary (25) and isolated secondary (5) winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.