Systems and methods for switching and mixing signals in a multi-channel amplifier
US7929718B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2004 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Dec 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/217
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and methods for scaling the number of output channels that can be provided in an audio amplification system. In one embodiment, a digital pulse width modulation (PWM) amplification system includes multiple four-channel PWM controller chips that are interconnected to enable synchronization and transfer of digital audio data from one chip to another. Input audio signals received by each of the channels are processed by sample rate converters to generate internal audio signals that have a predetermined sample rate and format. Each of the channels is synchronized so that the internal audio signal of each channel can be processed and output by any of the other channels. The PWM controller chips are connected by a high-speed interconnect that enables the transfer of data between them. Each input audio signal can be mapped to any of the outputs and can be mixed with other input signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.