Audio speaker protection system and method
US9693138B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2015 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Aug 28, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/181
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit may include an audio amplifier (314) configured to amplify an input signal (SAUDIO) to generate an output signal (SOUT+, SOUT−) suitable for driving a loud speaker (316). A first circuit (318) may be configured to generate a first analog signal (SI) based on a current level drawn by the loud speaker (316), and a second circuit (320) may be configured to generate a second analog signal (SV) based on a voltage supplied across the loud speaker (316). A third circuit (322, 312) may be configured to generate a third analog signal (RESIDUE) based on the difference between the first and second analog signals, and modify the input signal (SAUDIO) based on the third analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.