Operational amplifier input offset correction with transistor threshold voltage adjustment
US9319013B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 2014 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Oct 8, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45674
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A device can include an operational amplifier (op amp) circuit having a differential transistor pair, a first transistor of the differential transistor pair being formed in a first well of a substrate and a second transistor of the differential transistor pair being formed in a second well of the substrate; a body bias generator configured to generate at least a first body bias voltage for the first well, and not the second well, that varies in response to a first body bias control value; and a control circuit configured to selectively generate the first body bias control value in response to an input offset voltage of the op amp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.