Operational amplifier with offset voltage centering, and low-voltage compatible
US6456162B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Oct 17, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45071
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An operational amplifier includes an input stage, and a level-transforming stage with first and second arms. Each arm has at least one bipolar transistor. Input transistors are connected to the input stage and are connected together by their bases. At least one gain stage is connected to the transistor of the second transforming arm. A current terminal of the transistor on the first transforming arm is connected to its base by a bypass arm. In addition, the amplifier has a centering transistor connected by its base to the transistors on the arms of the transforming stage for controlling a current which conducts through the bypass arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.