Speaker system protection circuit
US4583245A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1984 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Jun 14, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit and method for protecting speakers and speaker systems from damage due to overload conditions. A crossover circuit splits a broad band input signal into output signals of selected frequency ranges, for driving speakers of corresponding frequency ranges. A sensing circuit monitors speaker driving signals and indicates when an overdriving condition exists on a higher frequency range speaker. A control circuit responds to the overdriving condition by causing the crossover circuit to shift the boundary between the split frequency ranges to route a lower frequency portion of the higher frequency range driving signal from the higher frequency speaker to the lower frequency speaker, while leaving output signal gain substantially unchanged in the selected frequency ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.