Operation amplifier for improving slew rate
US7652533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2008 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Feb 23, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45514
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An OP amplifier including an input stage and an output stage for improving a slew rate is provided. The input stage receives one of input voltages, and generates an internal voltage according to the received input voltage. The output stage receives and gains the internal voltage, and outputs an output voltage. The output stage includes a first transistor, a plurality of first capacitors and a first switching unit. The first transistor includes a first source/drain terminal coupled to a first voltage, a gate terminal controlled by the internal voltage. The output stage outputs the output voltage according to a voltage at a second source/drain terminal of the first transistor. First terminals of the first capacitors are coupled to the second source/drain terminal of the first transistor. The first switching unit selectively transmits the internal voltage to the second terminal of a corresponding one of the first capacitors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.