Circuit for providing a base operating voltage for a bipolar transistor and amplifier circuit
US7190220B2 · kind B2 · utility
2Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2005 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Jan 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/302
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for providing a base operating voltage for a bipolar transistor includes a UBE multiplier providing, in response to a working-point control current, a working voltage fed to a circuit for reducing the working voltage in order to generate a base operating voltage smaller than a base-emitter voltage drop of a bipolar power transistor. With this, the bipolar power transistor may be maintained in the class C operation in a flexible and robust manner, so that an amplifier with high efficiency is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.