Automatic gain control circuit and method for automatic gain control
US8965011B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2011 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Jan 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G7/002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of attenuating an input signal to obtain an output signal is described. The method comprises receiving the input signal, attenuating the input signal with a gain factor to obtain the output signal, applying a filter having a frequency response with a frequency-dependent filter gain to at least one of a copy of the input signal and a copy of the output signal to obtain a filtered signal, the frequency-dependent filter gain being arranged to emphasize frequencies within a number N of predetermined frequency ranges, N>1; wherein the filter comprises a sequence of N sub-filters, each one of the N sub-filters having a frequency response adapted to emphasize frequencies within a corresponding one of the N predetermined frequency ranges; determining a signal strength of the filtered signal, and determining the gain factor from at least the signal strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.