Operational amplifier
US6922105B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Aug 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45708
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an operational amplifier, a differential amplifying circuit is configured to amplify an input voltage inputted from the input terminal. An outputting transistor is connected to the output terminal. A driving transistor is connected to the differential amplifying circuit and the outputting transistor. The driving transistor turns on according to a control signal supplied from the differential amplifying circuit to the driving circuit. The driving transistor is also configured to drive the outputting transistor according to the control signal. A control signal reducing circuit, when a voltage is applied on the driving transistor through the outputting transistor, is configured to reduce the control signal within a range that the driving transistor is kept to on state. The voltage applied on the driving transistor exceeds a predetermined threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.