Communication semiconductor integrated circuit device and a wireless communication system
US7148764B2 · kind B2 · utility
31Cited by
4References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 13, 2002 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Nov 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/099
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a communication semiconductor integrated circuit device, an oscillator (VCO 10) of a PLL circuit can operate in a plurality of frequency bands. With a control voltage (Vc) of the oscillator fixed to a predetermined value (VDC), an oscillation frequency of the oscillator is measured for each band to be stored in a storage (18). When the PLL operates, a setting value to specify a band is compared with the measured frequency values stored in the storage. As a result of the comparison, a band to be actually used by the oscillator is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.