Phase-locked loop circuit, recording-and-reproducing apparatus, and electronic apparatus
US8022774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2009 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Jul 28, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/099
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase-locked loop circuit includes a phase detection unit which detects phase information of an input signal, a loop filter unit including a series circuit of a resistor and a capacitor, first and second pulse-current output units which supply pulse currents corresponding to the phase information output to one and the other of the resistor and the capacitor, and an oscillating unit capable of varying an oscillation frequency in accordance with a component obtained by combining a voltage generated at both ends of the one of the resistor and the capacitor on the basis of the pulse current supplied from the output terminal of the first pulse-current output unit and a voltage generated at both ends of the other one of the resistor and the capacitor on the basis of the pulse current supplied from the output terminal of the second pulse-current output unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.