发明名称 |
Communication set with detection of set function and line condition |
摘要 |
A description is given of a communication set for connection to a communication line such as a telephone line, which communication set includes means for detecting set functions such as ringing signal detection, and a rectifier circuit which is connected to a common output which is coupled to a scanning device included in the set function detection means, which scanning device detects the line conditions. A large number of line conditions may be detected with a minimum of components required, among which an analog/digital converter for which only a single input pin on a chip is necessary.
|
申请公布号 |
US7224793(B1) |
申请公布日期 |
2007.05.29 |
申请号 |
US19990395011 |
申请日期 |
1999.09.13 |
申请人 |
PHILIPS ELECTRONICS NORTH AMERICA CORP. |
发明人 |
SIJBERS PETER J. M.;THUS FRANCISCUS J. M.;VAN LEEUWEN LAURENS C. |
分类号 |
H04M1/00;H04M3/00;H04M1/24;H04M1/82;H04M3/08;H04M3/22;H04M13/00 |
主分类号 |
H04M1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|