Current switching technique
US4394761A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1981 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Apr 16, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B9/03
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A redundancy circuit comprising, in combination: a first measuring impedance; a plurality of operational amplifiers having inverting input terminals, non-inverting input terminals, and output terminals; a source of excitation voltage with respect to ground, the source being connected to the measuring impedance thus supplying signal current to the inverting input terminals, and the non-inverting input terminals being grounded; a like plurality of further impedances having first terminals connected respectively to the inverting terminals of the amplifier; and a switching arrangement having a plurality of conditions in each of which a selected one of the further impedances is connected between the output terminal and the inverting input terminal of a selected one of the amplifiers, and the remaining further impedances are connected between the inverting input terminals of the remaining amplifiers and ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.