Continuous closed-loop power control system including modulation injection in a wireless transceiver power amplifier
US7218951B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2004 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Dec 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0416
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A single continuous closed-loop power control feedback system provides seamless power control for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q modulator and supplied to a comparator located in the power control loop. By using leakage from the power amplifier as feedback to a phase locked loop during initial power amplifier power ramp-up, the single continuous closed-loop power control system provides continuous feedback to the phase locked loop during the entire power amplification ramp-up period and eliminates the need for multiple feedback loops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.