Semiconductor device, radio communication terminal, and method for controlling semiconductor device
US9197276B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2013 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | May 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor device according to the present invention includes a PLL circuit, in which the PLL circuit includes: a phase difference detection unit that detects a phase difference between a reference signal and a division signal; a filter that outputs a control signal according to a detection result of the phase difference detection unit; an oscillation unit that outputs an oscillation signal of a frequency according to the control signal; a division unit that divides the oscillation signal to output it as the division signal; a noise intensity detection unit that detects a noise intensity of a predetermined frequency component included in the control signal; and a phase difference adjustment unit that adjusts a phase difference between the reference signal and the division signal based on the noise intensity detected by the noise intensity detection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.