发明名称 |
Architecture for an AM/FM digital intermediate frequency radio |
摘要 |
An AM/FM DIF radio has an IF to audio converter that provides an audio signal from an IF signal responsive to a clock signal. During the processing of the IF signal, a spurious signal is intentionally generated. The spurious signal is based on the predetermined offset which is included in the IF signal applied to an A/D converter. The predetermined offset is greater than or equal to half of the AM bandwidth and less than or equal to the system bandwidth. The spurious signal is generated at a frequency proportional to the sum of an imprecision offset and the predetermined offset. A low pass filter removes the spurious signal while preserving the desired portion of the audio signal.
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申请公布号 |
US2005079838(A1) |
申请公布日期 |
2005.04.14 |
申请号 |
US20030683493 |
申请日期 |
2003.10.10 |
申请人 |
LI JUNSONG;BANKS BRADLEY A.;HO YUI-LUEN J. |
发明人 |
LI JUNSONG;BANKS BRADLEY A.;HO YUI-LUEN J. |
分类号 |
H04B1/28;(IPC1-7):H04B1/00;H04B1/26;H04B15/00 |
主分类号 |
H04B1/28 |
代理机构 |
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代理人 |
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地址 |
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