Signal processing device and image pickup apparatus using the same
US7429764B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2003 |
| Grant date | Sep 30, 2008 |
| Priority date | — |
| Expiry date | Apr 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal processing device is provided which is capable of suppressing a voltage change of a power supply when output signals from a plurality of signal sources are read, and capable of outputting a stable signal at a high sensitivity, and an image pickup apparatus using such a signal processing device is also provided. The signal processing device has: a plurality of terminals connectable to a plurality of signal sources; and a read circuit for converting signals input from the terminals into serial signals and outputting the serial signals, wherein: the read circuit comprises a holding capacitor connected to each of the terminals, a transfer switch for transferring a signal held in the holding capacitor to a common signal line, and a shift register for driving the transfer switch; and a semiconductor layer under the common signal line has a conductivity type opposite to a first conductivity type of a semiconductor substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.