A/D converter and solid-state imaging apparatus with offset voltage correction
US9083906B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Jun 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F7/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is an A/D converter including an input terminal, a reference signal line for supplying a reference signal which changes temporally, a comparator, a correction capacitor connected to an inverting input terminal of the comparator; and an output circuit which outputs digital data corresponding to an analog signal input to the input terminal. In a first state in which a total voltage of a first analog signal and an offset voltage of the comparator is held in the correction capacitor, a second analog signal input to the input terminal is supplied to a non-inverting input terminal of the comparator, and the second analog signal or the total voltage is changed using the reference signal, thereby outputting, from the output circuit, digital data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.