Method of ramping up output level of power amplifier of radio communication system, communication semiconductor integrated circuit, and radio communication system
US7324787B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 29, 2004 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Apr 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/361
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a radio communication system having a phase control loop for phase modulation and an amplitude control loop for amplitude modulation and being capable of time divisional transmission and reception under a predetermined time management, when transmission in a first mode is switched to transmission in a second mode or when transmission in the second mode is switched to transmission in the first mode, the output level of the power amplifier is lowered once to a predetermined level higher than the level when transmission related circuits are activated, and thereafter the output level of the power amplifier is again ramped after the settings have been changed but without starting of a transmission oscillator, establishing of the phase control loop and the amplitude control loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.