Automatic gain control circuit and apparatus including such a circuit
US5594760A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Sep 8, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3052
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Automatic gain control circuit comprising amplifier means (10) which produce an output signal that has an amplitude controlled by a control signal (CT). Recursive filter apparatus (20) (22) measures the power of the output signal and yield a measure of power which is compared (24) with a window of permitted power values to generate the control signal (CT). Depending on the result of the comparison, an initialization signal (INI) is transmitted which enforces a reference power value on a recursive filter to accelerate the gain control. Utilization in apparatus that use signals that have fast and considerable amplitude variations, as in digital modulation signal receivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.