发明名称 |
Method and apparatus for reducing EMI emissions for data signals traveling over a data pathway |
摘要 |
An improved data signal electromagnetic emissions system is provided for sending data signals over one or more data pathways. An original data signal is encoded into a set of sideband frequencies that exhibit a lower amplitude than the original data signal; then transmitted over the data pathway and later decoded back into a signal having the original data content. The encoding scheme uses a number of modulation pattern sets that each produce a set of sidebands about the data signal's fundamental and certain harmonic frequencies, in a manner that attempts to make the maximum amplitudes for each set of sidebands substantially equal to one another, although this is also dependent upon the data signal's frequency content.
|
申请公布号 |
US7515646(B2) |
申请公布日期 |
2009.04.07 |
申请号 |
US20040772838 |
申请日期 |
2004.02.05 |
申请人 |
LEXMARK INTERNATIONAL, INC. |
发明人 |
HARDIN KEITH B.;OGLESBEE ROBERT A.;RICHEY JOHN P. |
分类号 |
H04B15/00;H04B15/02 |
主分类号 |
H04B15/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|