Current control circuit, class AB operational amplifier system and current control method
US8138834B2 · kind B2 · utility
0Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2010 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Sep 30, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45681
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current control circuit for controlling a bias current of a class AB operational amplifier includes: a low current source, for generating a low bias current; a high current source, for generating a high bias current, which is greater than the low bias current; and a comparing and selecting unit, coupled to an output terminal of the class AB operational amplifier, for selecting one of the low bias current and the high bias current to output as the bias current according to an output voltage of the class AB OP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.