Non-switched capacitor offset voltage compensation in operational amplifiers
US6859095B2 · kind B2 · utility
3Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2003 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Jan 31, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45753
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for reducing offset voltage in an operational amplifier without the need for switched-capacitors, includes introducing a tapped resistor chain between the common connected terminals of the transistors of the input differential pair of the operational amplifier and connecting the tail current source/sink of the differential amplifier to a selected tap of the resistor chain. The invention further provides an improved operational amplifier in accordance with the above method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.