Time-to-digital converter, circuit device, physical quantity measurement apparatus, electronic instrument, and vehicle
US10678190B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2018 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Sep 8, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A time-to-digital converter includes a first oscillation circuit that starts oscillating at the transition timing of a first signal and generates a first clock signal having a first clock frequency, a second oscillation circuit that starts oscillating at the transition timing of a second signal and generates a second clock signal having a second clock frequency, a first adjustment circuit that adjusts the oscillation frequency of the first oscillation circuit based on a reference clock signal, a second adjustment circuit that adjusts the oscillation frequency of the second oscillation circuit based on the reference clock signal, and a processing circuit that converts the time difference between the transition timing of the first signal and the transition timing of the second signal into a digital value based on the first and second clock signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.