Method and apparatus for operating accessory interface functions over a single signal
US8909173B2 · kind B2 · utility
20Cited by
14References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2012 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Mar 30, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/72409
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An interface (100) is provided between an accessory (102) and a radio (104) to enable three functions over a single signal line (140) thereby minimizing pin count in a connector (112). The functions of accessory detect, one-wire memory and accessory PTT press are controlled over the single signal line (140) through the use of two comparators (116, 118) and two voltage dividers (106, 108, 110).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.