| 摘要 |
Stereo decoders for use in AM stereo receivers are disclosed which have two different modes of operation, one of which suffers adverse effects from the presence of co-channel interference and employs envelope detection to develop an (L+R) representative signal. When such interference is detected, the decoder switches to a second mode of operation, which is less affected by the interference, and also switches to synchronous detection to develop the (L+R) representative signal.
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