Modulator-amplifier
US7224219B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2006 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Sep 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/331
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and device for frequency shifting and amplifying an audio signal for use in a parametric loudspeaker system is disclosed. The method includes the operation of receiving an input audio signal and creating a reference signal. The audio signal is compared with the reference signal to derive a compared product signal. The compared product signal is sent to a switching power stage. Nonlinear preprocessing is performed with respect to the input audio signal, and/or a non-triangle wave is created as the reference signal. The input audio signal is shifted and amplified by modulating the reference signal in the switching power stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.