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61. 发明专利

JPS5944138A Demodulator of frequency modulation stereophonic signal 失效
标题翻译：频率调制立体声信号的调制解调器
公开(公告)号：JPS5944138A
公开(公告)日：1984-03-12
申请号：JP15500182
申请日：1982-09-06
申请人： Pioneer Electronic Corp
发明人： ISHIDA KOUJI , NUMATA TATSUO , SAKAMOTO MASAHARU
IPC分类号： H04B1/16 , H04H1/00 , H04H40/45 , H04H40/54
CPC分类号： H04H40/54 , H04B1/1646
摘要： PURPOSE:To prevent signal separation from deterioration due to the amplitude variation of a 38kHz sine wave subcarrier and the oscillation of a square wave pulse including an FM detecting output by changing the amplitude of the subcarrier. CONSTITUTION:When the amplitude of an FM-detected square wave pulse inputted from an FM detector 10 to a matrix circuit 8 is increased, the DC output of a peak-to-peak detecting circuit 2 is increased and the DC output voltage of a comparator 3 is also increased. Consequently, the gain of a VCA7 is raised and the amplitude of a 38kHz subcarrier is increased. If the amplitude of a 38kHz sine wave subcarrier, an output from a PLL circuit 4, is increased, the DC output voltage of the peak-to-peak detecting circuit 6 is increased and the output of the comparator 3 is reduced, so that the gain of the VCA7 is reduced and the amplitude of the 38kHz sine wave subcarrier is also reduced. Consequently, the ratio of the amplitude of the square wave pulse of the FM detecting output to that of the subcarrier is kept at a fixed value.
摘要翻译：目的：防止由于38kHz正弦波副载波的振幅变化引起的信号分离和通过改变副载波振幅的包括FM检波输出的方波脉冲的振荡。构成：当从FM检测器10输入到矩阵电路8的FM检测的方波脉冲的振幅增加时，峰 - 峰检测电路2的直流输出增加，比较器的直流输出电压 3也增加了。因此，增加了VCA7的增益，并增加了38kHz副载波的振幅。如果38kHz正弦波副载波的振幅来自PLL电路4的输出增加，则峰 - 峰值检测电路6的直流输出电压增加，比较器3的输出减小， VCA7的增益减小，并且38kHz正弦波副载波的振幅也减小。因此，将FM检测输出的方波脉冲的幅度与副载波的振幅的比率保持为固定值。

62. 发明专利

JPS5857938B2 JPS5857938B2 - 失效
公开(公告)号：JPS5857938B2
公开(公告)日：1983-12-22
申请号：JP9889679
申请日：1979-08-02
申请人： Pioneer Electronic Corp
发明人： ISHIDA KOJI , NOGUCHI TADASHI
IPC分类号： G01R19/165 , H04H1/00 , H04H40/54 , H04H40/72
CPC分类号： H04H20/88 , H04H40/54 , H04H40/72

63. 发明专利

JPS58105646A SUBCARRIER SIGNAL GENERATING DEVICE FOR STEREO TUNER 失效
公开(公告)号：JPS58105646A
公开(公告)日：1983-06-23
申请号：JP20470781
申请日：1981-12-18
申请人： PIONEER ELECTRONIC CORP
发明人： NOGUCHI TADASHI
IPC分类号： H03D1/22 , H04B1/16 , H04H1/00 , H04H40/54
摘要： PURPOSE:To easily design a filter, by eliminating higher harmonic components generated in a PLL circuit. CONSTITUTION:A VCO5 oscillates at 304kHz and an output (b) from the VCO5 is applied to trigger inputs of D-FFs 9, 10 in common. The D-FFs 9, 10 constitute what is called a ring counter. An output (c) from an output terminal Q of the D-FF9 is divided by a 1/2 divider 6 and the output (e) is applied to an adder 11 and an exclusive OR gate 12 to be used as a level coincidence detector. An output (d) from an output terminal Q of the D-FF10 is applied to the other input terminal of the gate 12 and a level coincidence detecting output (f) is applied to the other input terminal of the adder 11. The added output (g) is applied to a BPF7 and a sine wave subcarrier signal (h) outputted from the BPF7 is converted into a 38kHz square wave (i) by a level comparator 8. The wave (i) is converted into a 19kHz square wave (j) by a 1/2 frequency divider 1, and then compared in phase with a stereo pilot signal (a) in a phase comparator 1.

64. 实用新型

JPS5877931U 失效
公开(公告)号：JPS5877931U
公开(公告)日：1983-05-26
申请号：JP17429681
申请日：1981-11-24
IPC分类号： H03L7/06 , H03L7/08 , H03L7/087 , H04H1/00 , H04H40/54 , H04H5/00

65. 发明专利

JPS5741858B2 失效
公开(公告)号：JPS5741858B2
公开(公告)日：1982-09-06
申请号：JP6962377
申请日：1977-06-13
IPC分类号： H03D3/00 , H03D3/02 , H03L7/08 , H04H1/00 , H04H40/54 , H04S1/00

66. 实用新型

JPS558371Y2 失效
公开(公告)号：JPS558371Y2
公开(公告)日：1980-02-25
申请号：JP1243275
申请日：1975-01-29
IPC分类号： H04H1/00 , H04H40/54 , H04H5/00

67. 发明专利

JPS54163663A PHASE SYNCHRONIZING CIRCUIT 失效
公开(公告)号：JPS54163663A
公开(公告)日：1979-12-26
申请号：JP7281478
申请日：1978-06-15
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMASHITA KAZUHIKO
IPC分类号： H03L7/085 , H03L7/087 , H04H1/00 , H04H40/54

68. 发明专利

JPS5439986B2 失效
公开(公告)号：JPS5439986B2
公开(公告)日：1979-11-30
申请号：JP6551172
申请日：1972-06-30
IPC分类号： H03B19/14 , H04H1/00 , H04H40/54

69. 发明专利

JPS5426323B2 失效
公开(公告)号：JPS5426323B2
公开(公告)日：1979-09-03
申请号：JP984274
申请日：1974-01-22
IPC分类号： H04H1/00 , H04H40/54

70. 发明专利

JPS5478001A PILOT DETECTOR CIRCUIT 失效
公开(公告)号：JPS5478001A
公开(公告)日：1979-06-21
申请号：JP14550077
申请日：1977-12-02
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORIIKE YOSHIO
IPC分类号： H04N5/60 , H04B1/16 , H04H1/00 , H04H40/45 , H04H40/54
摘要： PURPOSE:To use commonly a pilot detector circuit and a trap circuit and eliminate the interference of pilot on demodulated signals by providing a secondary coil in the trap circuit in a voice multiple broadcasting demodulator circuit, etc. CONSTITUTION:Input composite signals are supplied to a trap circuit consisting of level adjustment circuit 3, capacity C and coil L1, and signals with pilot signals trapped are supplied to FM detector 2 through BPF 11. Then, pilot signals are extracted by coil L2 which is coupled with coil L1, and pilot signals which are demodulated by AM detector 6 are applied to Schmitt circuit 8 through filter 7, and switch 4 is controlled by this output.

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