发明名称 |
Digital delay FM demodulator with filtered noise dither |
摘要 |
Audio beat notes produced by sampling a square wave in a digital quadrature FM demodulator are reduced by adding filtered random noise, or dither, to the signal to be demodulated to randomly vary the width of successive pulses in the square wave. Filtration of the random noise prevents feedthrough of noise which would degrade the demodulated signal.
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申请公布号 |
US4772853(A) |
申请公布日期 |
1988.09.20 |
申请号 |
US19870084661 |
申请日期 |
1987.08.12 |
申请人 |
ROCKWELL INTERNATIONAL CORPORATION |
发明人 |
HART, BILLY D. |
分类号 |
H03B29/00;H03D3/02;H03D3/20;(IPC1-7):H03D3/06;H03K9/06 |
主分类号 |
H03B29/00 |
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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