Multimedia speaker detection circuit
US6359987B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1997 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | May 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S7/308
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A computer system having automatic speaker detection circuitry is disclosed. The typical computer system includes a central processing unit, a data input device, and a sound card. Further, there is an audio amplifier, as well as an automatic detection and selection circuit that may be within the sound card or the audio amplifier or just part of the computer system as a whole. This automatic detection selection device is able to determine an impedance load of an output device attached to the computer system, namely, a speaker system, and is able to disable the audio amplifier within the computer system upon determining the impedance load and matching that impedance load against a selected value indicating that no amplification of the signal is required for the output device. Further, an audio sound equalizer is part of the system and can be bypassed in the same manner that the audio amplifier is, namely, that particular impedance load is measured indicating that no equalization is necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.