Electronic endoscope apparatus outputting ternary drive signal
US5113254A · kind A · utility
60Cited by
8References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1990 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Jan 31, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/71
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An endoscope apparatus is disclosed in which the horizontal transfer of the charge of a solid imaging device such as a CCD and the resetting for the detection of the charge are conducted by a common drive signal. The signal transmitted from the solid imaging device is caused to contain a feed-through period by making the drive signal to be served by a multi-valued level horizontal transfer signal exceeding a trinary value. Therefore, reset noise or the like can be eliminated by processing the output signal by using a correlated double sampling circuit or the like so that a video signal exhibiting a good S/N ratio can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.