Apparatus for detecting type of audio interface
US9215541B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2012 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Dec 28, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting a type of an audio interface is disclosed. The apparatus comprises: an audio interface, comprising a pin 3 and a pin 4, in which one of the pin 3 and the pin 4 is configured as a MIC pin of the audio interface, and the other one is configured as a ground pin; a first level comparison module configured to output a signal Sg1, when a level V3 of the pin 3 is greater than a sum of a level V4 of the pin 4 and a predetermined threshold Vg1, otherwise to output a signal Sg1′; a second level comparison module configured to output a signal Sg2, when the level V4 of the pin 4 is greater than a sum of the level V3 of the pin 3 and a predetermined threshold Vg2, otherwise to output a signal Sg2′.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.