Ratioed reference voltage generation using self-correcting capacitor ratio and voltage coefficient error
US5646515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1995 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Feb 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/16
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A novel ratioed reference voltage circuit is taught which enables positive and negative output voltages as a ratio of a given reference voltage. The desired ratio is established by capacitor ratios. During the operation of the circuit, positive and negative ratioed output voltages are provided at various points in time which are not necessarily very accurate due to component mismatches and the like. However, the average of the positive ratioed reference voltage during two different periods of time is a highly accurate positive ratioed reference voltage due to error cancellation. Similarly, the average of the negative ratioed reference voltage during two different periods of time is a highly accurate negative ratioed reference voltage due to error cancellation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.