Earphone line control device and earphone
US9532129B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2014 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Mar 7, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earphone line control device includes a power supply management unit, a filter unit, a control unit, a first resistance, a first diode, a first switch, a second resistance and a second switch. A first end of the power supply management unit, a first end of the filter unit, an end of the first resistance, and an end of the second resistance are all connected to a power supply; the other end of the first resistance is connected to an anode of the first diode, a cathode of the first diode is connected to an end of the first switch, the other end of the second resistance is connected to an end of the second switch, the other end of the first switch and the other end of the second switch are both connected to ground; a first end and a third end of the control unit are respectively connected to the cathode of the first diode and the other end of the second resistance, a second end of the control unit is connected to ground, a fourth end of the control unit is connected to the other end of the filter unit; a second end of the power supply management unit is connected to ground, a third end of the power supply management unit is connected to the control unit. When the first switch or th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.