Temperature compensation of collector-voltage control RF amplifiers
US7696826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2006 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Apr 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/78
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A temperature compensation system for compensating a collector-voltage controlled RF amplifier. To overcome variation that occurs with temperature which can result in signal degradation of the adjacent channel spectrum, a temperature compensated current is utilized to create an offset signal. The offset signal is processed in connection with a control or data signal to generate a temperature compensated voltage source control signal. A differential amplifier may process the data or control signal and the offset signal. The compensated voltage control signal tracks temperature to adapt the applied collector voltage to temperature. This in turn forces the applied collector voltage to vary in response to temperature changes thereby maintaining a constant output power or RF swing. One example environment of use is in an EDGE type GSM system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.