Track and hold circuit with continuously suppressed Josephson effect
US5272480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Aug 17, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A track and hold circuit for use with an analog signal quantizer, comprising a multiple of four superconductor-insulator-superconductor (SIS) junctions arranged in a bridge. A storage inductance is connected to opposite nodes of the bridge, with an analog signal input being orthogonally injected into the bridge. The SIS junctions are magnetically suppressed from reaching a superconducting, zero-voltage state, limiting switching of the SIS junctions between a subgap voltage, high differential resistive behavior and a low differential resistive behavior exhibited when a gap voltage is attained. Preferably, each SIS junction includes a magnet that suppresses the superconductivity. Alternatively, a control wire may be used to provide a magnetic field to suppress superconductivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.