Clamping circuit for video signals
US7176985B2 · kind B2 · utility
0Cited by
14References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2003 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Oct 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus, system and method for clamping a video signal input to a coupling capacitor (215) for providing a clamping voltage. A charging current is applied to the capacitor (215) via an amplifier (225) having a first input (227) coupled with the capacitor output and a second input (226) coupled to a reference potential, the amplifier (225) is responsive to the capacitor output signal and the reference potential for providing the charging current to the capacitor (215). The current has a linearly varying magnitude which is proportional to a difference between the capacitor output and the reference potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.