Temperature correction circuit and method of operating a power amplifier
US11251752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2020 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Aug 14, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G2201/708
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A temperature correction circuit and method for maintaining a transistor of a power amplifier in a linear operating region of the transistor. The temperature correction circuit includes a first current source circuit operable to provide a first correction current proportional to an absolute temperature of a semiconductor die including the transistor. The temperature correction circuit also includes a second current source circuit operable to provide a second correction current proportional to a change in temperature of a part of the semiconductor die in which the transistor is located during operation of the transistor. The temperature correction circuit further includes a third current source circuit operable to provide a gain selection current. The temperature correction circuit also includes circuitry for producing a reference current from the first and second correction currents and the gain current. The temperature correction circuit further includes an output for providing the reference current to the transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.