Multiple-stage operational amplifier and methods and systems utilizing the same
US7202746B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | May 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45512
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multiple-stage operational amplifier including a gain stage for amplifying an input signal and implementing a dominant pole producing a frequency response having a gain roll-off with frequency and a unity gain frequency. An intermediate stage is coupled to an output of the gain stage and has a high input impedance and a low output impedance. A high gain amplifier configured as a low gain output stage using resistive feedback and coupled to an output of the intermediate stage drives an output of the operational amplifier and implements a dominant pole at a frequency substantially higher than the unity gain frequency implemented by the dominant pole implemented the gain stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.