Fully differential, CMOS operational power amplifier
US4794349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Aug 7, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45674
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A fully differential, CMOS, operational power amplifier, particularly useful as output buffer in monolithic analog subsystems, includes an input differential stage, two gain stages and two output stages. Each output stage may be individually provided with a functional feedback loop and locally compensated for reestablishing sufficient stability. An output common mode control circuit, operable in a continuous or sampled manner, is also contemplated, as well as a special circuit for controlling the DC biasing current through the output stages under rest conditions. The amplifier may be used indifferently as a balanced (differential) output or as a single-ended output amplifier without any depression of its performances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.