Stability control multistage operational amplifier
US6407636B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/083
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An operational amplifier includes an input transconductor stage with differential inputs and an output, an output stage, and at least one intermediate stage connected between the input stage and the output stage so as to form an amplifier chain. The intermediate stage includes a common-emitter bipolar transistor between first and second power supply terminals, and at least one feedback resistor connected between the bipolar transistor emitter and one of the power supply terminals. The intermediate stage also includes at least one feedback capacitance connected between the emitter terminal of the transistor and an output of a next stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.