Common mode feedback circuit with backgate control
US10523165B2 · kind B2 · utility
1Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2018 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jan 3, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45474
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A common mode feedback (CMFB) loop for a differential amplifier sense an output common mode of a differential circuit and provides feedback to the gates of tail current transistors. Many CMFB loops cannot easily adjust the output common mode voltage and the output common mode may vary over process, voltage, and temperature. An improved CMFB circuit adds a control circuit to control backgates of tail current transistor device(s) of the differential circuit such that the output common mode voltage can be made adjustable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.