发明名称 |
Circuit for demodulating amplitude and angle modulated broadcast signals |
摘要 |
A superheterodyne receiver is described for demodulating signals containing both amplitude and angle modulation components. An intermediate frequency signal is produced which is simultaneously amplitude detected as well as angle demodulated. Detector means are provided for detecting the occurrence of high negative amplitude modulation peaks of the broadcast signal. During high negative amplitude modulation peaks, the angle demodulator output is held at a fixed level until the amplitude of an input signal is restored to a predetermined minimum level.
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申请公布号 |
US4340782(A) |
申请公布日期 |
1982.07.20 |
申请号 |
US19800159357 |
申请日期 |
1980.06.13 |
申请人 |
MAGNAVOX CONSUMER ELECTRONICS CO. |
发明人 |
WEIGAND, JAMES R.;STREETER, ROBERT D. |
分类号 |
H04B1/26;H03D5/00;H04H20/49;(IPC1-7):H04H5/00 |
主分类号 |
H04B1/26 |
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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