High swing, low power output stage for an operational amplifier
US5739721A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Feb 13, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/3001
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high swing, low power output stage for an operational amplifier is provided which includes: 1) a folded-cascode gain stage having a differential pair of natural V.sub.T devices, which are preferably P-channel transistors; 2) a source-follower input stage connected to the folded-cascode gain stage and to the input of the high swing output stage; and 3) a source-follower output stage connected to the folded-cascode gain stage connected to an output of the source-follower stage and to the output of the high swing output stage. The high swing output stage also includes a compensation capacitor which is used to provide dominant pole frequency compensation for the high swing output stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.