Systems, circuits and methods related to controllers for radio-frequency power amplifiers
US9093969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2013 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Sep 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed are systems, circuits and methods related to controlling of a radio-frequency (RF) power amplifier (PA). In some embodiments, a PA control circuit can include a first circuit configured to generate a replica base current from a base current provided to the PA, with the replica base current being representative of a collector current of the PA scaled by a beta parameter. The PA control circuit can further include a second circuit configured to generate a beta-tracking reference current from a temperature-compensated voltage and a base resistance associated with the PA. The PA control circuit can further include a current steering circuit configured to receive the replica base current and the beta-tracking reference current and generate a proportional current to a clamping node of a base driver. In some embodiments, the replica base current can be obtained by a current-mode comparison of a finger-sensed current with a ramp current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.