发明名称 |
Multiple frequency signal detector |
摘要 |
A method for characterizing a dual frequency (DF) signal including the steps of sampling the signal at a sampling frequency vs so as to obtain a sequence of signal samples, and obtaining an alpha-constant and a beta-constant of the DF signal meeting a predetermined criterion.
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申请公布号 |
US6519541(B1) |
申请公布日期 |
2003.02.11 |
申请号 |
US19990324159 |
申请日期 |
1999.06.02 |
申请人 |
VOCALTEC COMMUNICATION, LTD. |
发明人 |
BITTON CHARLY |
分类号 |
G01R23/16;(IPC1-7):G01R23/16 |
主分类号 |
G01R23/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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