Differential amplifier slew rate boosting scheme
US6741129B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Dec 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45722
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A fully differential amplifier slew rate boosting scheme for use with an amplifier having a closed-loop gain very near unity or less has the first plates of the compensation capacitors 50 and 52 conventionally coupled to internal high impedance gain nodes 40 and 42, but has the other plates of the compensation capacitors 50 and 52 unconventionally driven with the input signal IN+ and IN−. The voltages appearing across the compensation capacitors 50 and 52 in response to changes in the input signal is significantly less than that achieved using conventional compensation architectures where the other plates of the compensation capacitors are coupled to ground. Since little current is now required to charge the compensation capacitors 50 and 52, the input stage tail current no longer limits the slew rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.