Precision switched capacitor ratio system
US5424670A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Jan 24, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H19/004
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A precision switched capacitor ratio system includes a capacitor; a switching device for selectively interconnecting the capacitor with one of a plurality of charging circuits and alternately connecting it with a discharge circuit for discharging the capacitor between each interconnection with a charging current; an integrating device interconnected with the capacitor for averaging the current during the charging and discharging of the capacitor for defining the switched capacitor equivalent resistance; and a clock device for providing synchronized clock signals for operating the switching device to precisely define the ratio of the frequencies of the interconnection of the capacitor with each of the charging circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.