公开(公告)号：KR810000344B1

公开(公告)日：1981-04-20

申请号：KR800004603

申请日：1980-12-02

Applicant: MOTOROLA INC

Inventor： PARKER N ,  HILBERT P

IPC: H04H1/00 ,  H04H20/49 ,  H04H5/00

公开(公告)号：KR810000345B1

公开(公告)日：1981-04-20

申请号：KR770000844

申请日：1977-04-07

Applicant: MOTOROLA INC

Inventor： PARKER N ,  HILBERT P

IPC: H04H1/00 ,  H04H40/36 ,  H04H5/00

Abstract: The improved compatible AM stereophonic receiver has the parts for providing compensation signals proportioning the angle &phgr;. The parts comprises a limiter(34) for limiting the amplitude modulation components of the output signals(66b) of the amplifier(65), a multiplier(35) for multiplying the outputs of limiter(34) and phase shifter(73) for shifting the output of VCO(36) and a compensation cct(37). The outputs of the phase shifter(73) and the multiplier(35) are applied to the compensation cct(37). The outputs(95) of the compensation cct., whose value is divided the reference voltage output from the VCO(36) by cos&phgr;, is applied to the input stages of phase shifter(38)(39).