Circuit device and oscillator
US12184293B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2023 |
| Grant date | Dec 31, 2024 |
| Priority date | — |
| Expiry date | Apr 14, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/093
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit device includes: a first phase comparison circuit including a sampling circuit that samples a feedback signal based on a reference clock signal; a first charge pump circuit configured to output a current corresponding to a sampling voltage; a second phase comparison circuit including a dead zone detection circuit that detects whether a phase difference between the reference clock signal and a feedback clock signal falls within a dead zone, and configured to output a phase difference signal when the phase difference does not fall within the dead zone; a second charge pump circuit; and a clock signal generation circuit configured to generate the clock signal having a frequency controlled based on an output of the first charge pump circuit or the second charge pump circuit. The second charge pump circuit is set disabled or in a low power consumption mode in a dead zone period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.