Headset/radio auto sensing jack
US6594366B1 · kind B1 · utility
99Cited by
14References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1997 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Dec 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/05
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A headset/headphone sensing jack (203, 208, 210). A two-channel sensing circuit (210) is provided which detects whether a headphone (101) or headset (103) is installed. By employing an impedance sensing circuit (210), it is possible to use a single common 2.5 mm jack (120) for both radio and telephony operation. Formerly, two separate jacks would be required for both functions. An electronic device (50) according to the present invention is further capable of switching between AM/FM radio and telephone modes depending on whether a particular headpiece (101, 103) is installed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.