Low bias current/temperature compensation current mirror for linear power amplifier
US6559722B1 · kind B1 · utility
14Cited by
23References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2000 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Aug 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/99
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifier circuit is disclosed, whose power efficiency is optimized by operating its stages in substantially close to a Class B mode by reducing the quiescent current during low driver signal levels. As the driver signal amplitude increases, the amplifier is dynamically biased to operate in a Class AB mode. A further enhancement to the power amplifier circuit includes a temperature compensation circuit to adjust the bias of the amplifier so as to stabilize the performance over a wide temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.