Analog-to-digital converter including delay circuit and compensator, image sensor including the analog-to-digital converter, and method of operating the same
US10992309B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2020 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Jul 23, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An analog-to-digital converter for converting a pixel signal generated from sensed light into a digital signal includes a comparator configured to compare the pixel signal with a ramp signal having a constant slope to generate a comparison signal; a delay circuit configured to generate a first signal corresponding to the comparison signal, the delay circuit including a plurality of delay elements configured to generate a second signal by delaying the first signal by a first time period; and a compensator circuit configured to measure a period of the comparison signal to output a delay select signal to the delay circuit based on the measured period, the delay select signal delaying the first signal by the first time period, wherein the first time period is obtained by dividing the period of the comparison signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.