Automatic gain control circuit for a modem receiver
US6289044A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1998 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | May 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3052
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic gain control method and apparatus for modem receivers. The automatic gain control circuit includes a programmable loop gain for scaling a digital signal Y to a first prescribed level during a first mode of operation and to a second prescribed level during a second mode of operation; and filters and converters for converting the scaled signal Y into an analog gain control signal for input to the analog AGC. The gain control circuit and method of operation provides control over the parameters of the programmable loop gain such that during start-up initialization the signal Y is scaled to the first prescribed value and during steady state operation the signal Y is scaled to the second prescribed value. This is accomplished by changing the gain parameter of the programmable loop gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.