Compensating circuit for MOSFET analog switches
US5479121A · kind A · utility
14Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention deals with the problem of an error voltage in a MOSFET analog switch sample and hold circuit caused by the turn off charge in the MOSFET analog switch. The invention provides a compensating circuit which can be adjusted to exactly compensate for the turn off charge which causes the error so that the error can be reduced to zero or nearly zero. The compensating circuit can be used in both open loop and closed loop sample and hold circuits. The compensating circuit can be used in combination with a Miller feedback circuit for eliminating the error voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.