Class AB amplifier with programmable quiescent current
US9407208B2 · kind B2 · utility
1Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2014 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Nov 7, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45512
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Class AB amplifier has a control stage and a push-pull stage. The control stage has a programmable resistor that allows a floating constant voltage to applied to the push-pull stage such that the quiescent current of the amplifier is relatively low. The configuration enables the amplifier to operate properly at relatively low power-supply voltage levels. The amplifier can be configured as the output driver for an operational amplifier (op-amp) with a Miller compensation configuration that replaces the conventional Miller compensation resistor with a transistor that is part of the op-amp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.