Phase-locked circuit and radio communicating device
US8412120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2011 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Oct 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a phase-locked circuit including: a phase-locked section including a voltage controlled oscillator having a capacitance bank and changing oscillation frequency according to voltage information, the phase-locked section phase-locking an oscillating signal of the voltage controlled oscillator to a reference signal; and a calibration section having a voltage correcting function for supplying an appropriate calibration voltage to the voltage controlled oscillator in performing frequency calibration for the voltage controlled oscillator; the calibration section including a counter circuit, a first storage circuit and a second storage circuit, a comparator circuit, a control circuit, a voltage generating circuit, and a processing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.