Method of driving image sensor and image sensor
US5485206A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1993 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Jul 9, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/767
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal is read from photodiodes periodically with a predetermined period and applied to the input terminal. The input signal is amplified by an amplifier circuit and switched by a signal switching circuit to be alternately input to two offset cancel circuits through their respective switching elements. The period with which the switching elements are periodically turned on is set to be virtually double the period in the outputting of the signal from the photodiodes. The periods of time at which the switching elements are alternately turned on are shifted virtually half the period from each other. Further, output signals from the offset cancel circuits are adapted to be alternately output through a multiplexer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.