Analog-to-digital conversion and method of analog-to-digital conversion
US10340936B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2016 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Oct 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1235
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An analog-to-digital converter (110) for an imaging device comprises an analog signal input (123) for receiving an analog signal from a pixel array of the imaging device and N ramp signal inputs (121, 122) for receiving N ramp signals, where N is an integer ≥2. The N ramp signals have different slopes. The ADC has a clock input (143) for receiving at least one clock signal. A comparison stage (120) is connected to the ramp signal inputs and to the analog signal input. The comparison stage (120) is configured to compare the ramp signals with the analog signal to provide comparison outputs during the conversion period. A control stage (130) is configured to control a counter stage (140) based on the comparison outputs and a selection input indicative of when at least one handover point has been reached during the conversion period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.