Fully integrating resistive array electronic multiplexor
US5747805A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sensor circuit and method for detecting the current output by one or more resistive detectors by connecting a respective integrating capacitor and a respective switch connected to each detector. Each detector charges the respective integrating capacitor until the switch allows the stored charge in the integrating capacitor to be transferred to the feedback capacitor of a shared operational amplifier which converts the stored charge to a voltage. In this way, current, not voltage is multiplexed and each sensor can be operated, that is, collect charge, virtually all the time. Thus, fewer components are required to monitor a large number of resistive detectors with little or no degradation in the signal to noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.