Solid-state imaging apparatus and method for driving solid-state imaging apparatus
US9232165B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2012 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Jun 15, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A solid-state imaging apparatus includes: a ramp signal generator for generating first and second time-changing ramp signals during first and second analog-to-digital conversion periods, respectively; comparators for comparing a reset signal of a pixel with the first ramp signal during the first analog-to-digital conversion period, and comparing a pixel signal with the second ramp signal during the second analog-to-digital conversion period; and memories for storing, as first and second digital data, count values of counting from a start of changing the first and second ramp signals until an inversion of outputs of the comparators, during the first and second analog-to-digital conversion periods, wherein the ramp signal generator supplies a current from a current generator to a first capacitor element by a sampling and holding operation of a switch, and generates the first and second ramp signals based on the same bias voltage held by the first capacitor element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.