Circuit device, oscillator, clock signal generator, electronic apparatus, and vehicle
US10637484B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2019 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Jul 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/181
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit device includes an oscillation signal generation circuit that generates an oscillation signal by using a resonator and a processing circuit that estimates an aging characteristic of the oscillation frequency of the resonator based on the result of comparison between the phase of a reference signal based on a satellite signal transmitted from a navigation satellite and the phase of a clock signal based on the oscillation signal. The processing circuit estimates the aging characteristic based on an index value representing the reliability of the state of the received satellite signal and the result of the phase comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.