Method and apparatus for compensating for variations in magnetic flux supplied to a squid superconducting loop input coil by applying a modulated signal to a modulation coil thereof
US5194807A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Sep 5, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/846
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A constant bias voltage is applied to plural superconducting quantum interference devices which are interconnected in parallel. Output currents from the superconducting quantum interference devices are supplied in added condition. Maximal-sequence codes are modulated by a modulation current corresponding to each device, and the modulated maximal-sequence codes are supplied to the modulation coil of each corresponding superconducting quantum interference device. The added output current is demodulated for each device by a maximal-sequence code which is phase shifted by the same quantity as the maximal-sequence code for modulation for each device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.