Semiconductor integrated circuit for communication, radio-communications apparatus, and transmission starting method
US7230997B2 · kind B2 · utility
5Cited by
14References
11Claims
0Family size
Assignees
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Key dates
| Filing date | Feb 26, 2003 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Dec 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a polar loop based radio-communications apparatus having a phase control loop for controlling the phase of a carrier outputted from an oscillator for transmission, and an amplitude control loop for controlling the amplitude of a transmission output signal outputted from a power amplification circuit, the phase control loop is first started while maintaining the amplitude control loop in an off state at the outset of transmission, and the amplitude control loop is started after stabilizing the phase control loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.