Quiescent current control circuit for high-power amplifiers
US6992524B2 · kind B2 · utility
6Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2003 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Sep 8, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/18
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bias control circuit for controlling a bias circuit coupled to an amplifier transistor. The bias control circuit receives a control voltage, and actively adjusts an equivalent resistance of the bias control circuit responsive to the control voltage, wherein the equivalent resistance is established between a first node and a reference voltage. In one embodiment, when the control voltage is increased, the equivalent resistance is gradually decreased and a current drawn by the bias control circuit is gradually increased, resulting in a quiescent current of the amplifier transistor being gradually increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.