发明名称 |
RDS data demodulator capable of precisely attenuating ARI signal |
摘要 |
An RDS data demodulator includes an analog-to-digital converter for converting an analog FM signal into a digital FM modulation signal; a first filter having a transfer zero point at a predetermined frequency, for receiving the digital FM modulation signal and for attenuating an information modulation signal; a second filter having a pass band characteristic at the predetermined frequency, for receiving a filter output signal from the first filter and for extracting an RDS modulation signal; and RDS demodulating means for demodulating the RDS modulation signal from the second filter to output both an RDS data signal and a reproduction clock signal used to demodulate the RDS data signal.
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申请公布号 |
US6556631(B1) |
申请公布日期 |
2003.04.29 |
申请号 |
US19990259286 |
申请日期 |
1999.03.01 |
申请人 |
PIONEER ELECTRONIC CORPORATION |
发明人 |
YAMAMOTO YUJI;KOBAYASHI TERUKAZU |
分类号 |
H04L27/22;H04B1/16;H04H1/00;H04H40/18;H04J1/00;(IPC1-7):H04L27/06 |
主分类号 |
H04L27/22 |
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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