Electronic device powered through earphone interface and earphone power line
US9197957B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 19, 2013 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Jan 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic device receives power through an earphone interface, and includes the earphone interface, a processing unit, an audio codec chip, a first switch and a second switch. The earphone interface includes a left channel pin, a right channel pin, a ground pin and a microphone pin. The first switch includes a first normally closed terminal, a first normally open terminal, a first common terminal and a first controlled terminal The second switch includes a second normally closed terminal, a second normally open terminal, a second common terminal and a second controlled terminal. The processing unit includes a detect pin and a switch control pin. An earphone power line to power the electronic device is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.