Phase control device

专利名称：Phase control device发明人：Akira Nishioka申请号：US06/123312申请日：19800221公开号：US04339631A公开日：19820713

摘要：A phase control circuit for use in a compatible quadrature AM stereophonicreceiver in which the phase of the output signal of a voltage-controlled oscillator in aphase-locked loop circuit has a fixed predetermined phase difference with respect to theinput signal at all times. A variable phase shifter varies the phase of the output signalfrom the voltage controlled oscillator in the phase-locked loop circuit in accordance withan input control voltage. The phase of the output of the variable phase shifter is

compared with the phase of the input intermediate frequency signal to produce a controlsignal voltage for the variable phase shifter which varies according to the phasedifference between the two compared signals wherein the desired signal having a fixedphase difference is provided at the output of the variable phase shifter.

申请人：PIONEER ELECTRONIC CORPORATION

代理机构：Sughrue, Mion, Zinn, Macpeak & Seas

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