Adaptive gain adjustment system
US8717211B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2011 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Jul 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/51
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques for adaptive gain adjustment in a signal processing path to achieve greater dynamic range. In an exemplary embodiment, a digital gain is applied to a digital input signal based on a detected level of the digital input signal. A corresponding analog gain is applied to the output of a digital-to-analog converter for converting the digital input signal to an analog signal, the product of the digital gain and the analog gain being kept constant. In an exemplary embodiment, a zero cross detector is employed to update the digital and analog gains only in the vicinity of zero crossings detected in the signal. In a further exemplary embodiment, a peak detector is employed to instantaneously adjust the digital and analog gains to avoid clipping in the signal path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.