High frequency power amplifier, and communication apparatus
US6690237B2 · kind B2 · utility
18Cited by
10References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Apr 27, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/181
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The high frequency power amplifier comprises a detector which detects a collector output power (or base input power) of an amplifying transistor, and a DC/DC converter which changes a collector voltage of the amplifying transistor in proportion to the detected power. Thus, a DC power consumed by the amplifying transistor is controlled. A resistor for a base bias of the amplifying transistor is connected to the DC/DC converter, thereby interlocking the base bias control with the control of the DC/DC converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.