Comparator, AD converter, solid-state imaging device, and camera system
US8767106B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2012 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Nov 19, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a comparator including: a first input sampling capacitance; a second input sampling capacitance; an output node; a transconductance (Gm) amplifier as a differential comparator section configured to receive a slope signal, a signal level of the slope signal changing with a slope, at one input terminal of the Gm amplifier via the first input sampling capacitance, and receive an input signal at another input terminal of the Gm amplifier via the second input sampling capacitance, and subject the slope signal and the input signal to comparing operation; and an isolator configured to hold a voltage of an output section of the Gm amplifier constant, the isolator being disposed between the output section of the Gm amplifier and the output node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.