Circuit for transmitting a solid-state image pickup device signal to a signal processor
US6753905B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1998 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Sep 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/555
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The circuit according to the present invention is a signal transmission circuit for a solid-state image pickup device which performs favorable signal transmission by suppressing heat production around an image pickup device to a minimum level. This circuit is used for transmitting video signals output from a CCD to a signal processor of a processing unit by way of a transmission line, and comprises, at a stage subsequent to the CCD, a complementary circuit composed of two current controlling diodes, a first transistor, a second transistor and a plurality of resistors. This complementary circuit operates the first transistor and the second transistor alternately, thereby outputting video signals from the CCD as positive and negative signals taking 10 V, for example, as standard. Such an operation of class B eliminates a necessity to supply a bias current, thereby preventing heat production from the transistors and resistors due to application of a bias current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.