Apparatus and methods for biasing power amplifiers
US9362870B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Jul 31, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods for biasing power amplifiers are disclosed herein. In certain implementations, a power amplifier system includes a power amplifier and a bias circuit that generates a bias voltage for biasing the power amplifier. The bias circuit includes an amplifier, a current source for generating a reference current, and a reference transistor having a current therethrough that changes in relation to the bias voltage. The amplifier can control the bias voltage based on an error current corresponding to a difference between the reference current and the current through the reference transistor. The amplifier can be used to control the bias voltage such that the reference current and the current through the reference transistor are substantially equal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.