Loudspeaker protection circuit
US8199918B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Oct 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker protection circuit comprises a rectification stage for receiving an input audio signal and producing a rectified output signal, a detection stage for passing the rectified output signal when the rectified output signal is greater than a predetermined level, a timing stage for receiving the rectified output signal from the detection stage and producing a time-varying charge signal, a regulation stage for producing a regulated output signal based on the input audio signal, an actuator stage for actuating a switch based on the time-varying charge signal and the regulated output signal, and an attenuation stage for attenuating an output audio signal when the switch is actuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.