Embedded speaker protection for automotive audio power amplifier
US9386372B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 30, 2015 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Jun 30, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of operating a speaker system including a speaker coupled to an amplifier, and a dedicated digital speaker protection circuit includes turning on the amplifier in a mute mode, after a first delay period, issuing a play command to the amplifier to place the amplifier in a play mode, but without an input signal during a second delay period, and performing a speaker offset detection during the second delay period, wherein, if there is an offset, then the amplifier is forced back into the mute mode, and if there is no offset, then the amplifier is allowed to continue to operate in the play mode. The method also includes issuing a speaker protection control signal or command if an offset is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.