Bounded signal mixer and method of operation
US7869609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2005 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Nov 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for mixing a plurality of signals within a predetermined dynamic range without clipping. In the method and apparatus, first and second signal samples are added together to obtain a first intermediate result. Then the first signal sample is multiplied with the second signal sample to obtain a second intermediate result. In one embodiment, the second intermediate result is subtracted from the first intermediate result to obtain a third intermediate result, and the third intermediate result is discarded if the third intermediate result is less than zero. In another embodiment, the second intermediate result is added to the first intermediate result to obtain the third intermediate result, and the third intermediate result is discarded if the third intermediate result is greater than zero. An output signal sample is provided based on the third intermediate result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.