Pilot signal eliminating device for fm stereo receiver
专利汇可以提供Pilot signal eliminating device for fm stereo receiver专利检索，专利查询，专利分析的服务。并且PURPOSE:To simplify the circuit constitution by comparing the DC voltage given from LPF with the reference value at the comparator circuit, supplying the comparison output to the stereo display terminal in case the DC voltage is larger than the reference voltage and making part of the eliminating circuit double the stereo display circuit. CONSTITUTION:Synchronous AM detection circuit 12 gives a synchronous AM detection to the composite signal supplied to stereo demodulator circuit 2 via the signal of 19K Hz synchronizing with the pilot signal, and the output is sent to LPF13. Automatic voltage control amplifier 15 utilizes the DC voltage corresponding to the size of the pilot signal sent from LPF13 as the control voltage and uses the signal of 19K Hz synchronizing with the pilot signal as the input respectively. And the output of amplifier 15 is applied to the input cirucit in order to eliminate the pilot signal contained in the composite signal. In this case, the DC voltage sent from LPF13 is compared with the reference voltage at comparator circuit 17. And when the DC voltage is larger than the reference voltage, the signal from circuit 17 is supplied to stereo display terminal 18. Then part of the eliminating circuit is made to double the stereo display circuit, thus simplifying the circuit constitution.，下面是Pilot signal eliminating device for fm stereo receiver专利的具体信息内容。
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