Fast-convergence two-stage automatic gain control (AGC)
US7206030B2 · kind B2 · utility
1Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 20, 2004 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Apr 28, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are methods and systems for automatic gain control (AGC) in circuits. The disclosed methods and systems provide accurate and rapidly converging automatic gain control suited for video applications. According to disclosed preferred embodiments of the invention, a signal amplitude controlling method is responsive to gain underflow or overflow. A new fine gain control value is extrapolated and a new coarse gain control value is determined. The new fine gain and new coarse gain control values are applied to the signal to produce an output signal within a pre-selected output amplitude range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.