Direct current (DC) and/or alternating current (AC) load detection for audio codec
US9986351B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2016 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Jul 24, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/222
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A portable audio device may be configured to measure load characteristics of headphones. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load. These characteristics may be measured by an audio component, such as an audio codec chip or integrated circuit (IC) controller, and reported to software or firmware executing on a processor coupled to the audio component. The software or firmware may then take action based on the measured load characteristics. For example, the load characteristics may be compared to a database of headphones and their known load characteristics to determine a particular headphone model or type of headphone attached to the audio output. The processor may then apply an appropriate equalization curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.