Dual control active superconductive devices
US5229655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Dec 26, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/205
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A superconducting active device has dual control inputs and is constructed such that the output of the device is effectively a linear mix of the two input signals. The device is formed of a film of superconducting material on a substrate and has two main conduction channels, each of which includes a weak link region. A first control line extends adjacent to the weak link region in the first channel and a second control line extends adjacent to the weak link region in the second channel. The current flowing from the first channel flows through an internal control line which is also adjacent to the weak link region of the second channel. The weak link regions comprise small links of superconductor, separated by voids, through which the current flows in each channel. Current passed through the control lines causes magnetic flux vortices which propagate across the weak link regions and control the resistance of these regions. The output of the device taken across the input to the main channels and the output of the second main channel and the internal control line will constitute essentially a linear mix of the two input signals imposed on the two control lines. The device is especiall…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.