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1.发明授权Control voltage generating circuit for activating a noise reduction circuit in an FM stereo receiver 失效用于激活FM立体声接收机中的降噪电路的控制电压产生电路
公开(公告)号：US4694500A
公开(公告)日：1987-09-15
申请号：US834980
申请日：1986-02-28
CPC分类号： H04H40/72 , H04B1/1027 , H04B1/1676
摘要： A high-cut and high-blend control voltage generating circuit for activating a noise reduction circuit of an FM stereo receiver is configured to be simply responsive to multipath noises and never to plug noises. A changing and discharging circuit in the control voltage circuit may have a relatively long charging time constant, and the voltage control circuit may be configured to be simply responsive to multipath noises above a predetermined level. Thus the circuit is much less liable to operate erroneously.
摘要翻译： 用于激活FM立体声接收机的降噪电路的高切高混合控制电压发生电路被配置为简单地响应于多路径噪声，并且从不插入噪声。 控制电压电路中的改变和放电电路可以具有相对长的充电时间常数，并且电压控制电路可以被配置为简单地响应于高于预定电平的多径噪声。 因此，该电路不太容易错误地操作。
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公开(公告)号：US4881274A
公开(公告)日：1989-11-14
申请号：US152531
申请日：1988-02-05
申请人： Satoru Tazaki , Yasuhiro Yoshioka
发明人： Satoru Tazaki , Yasuhiro Yoshioka
CPC分类号： H04B1/1081
摘要： An FM multipath noise reduction circuit is disclosed, in which a condenser for rapid charging is connected between the power source line and a charge/discharge condenser disposed in a level shift circuit system so that the rise time constant of the control output voltage at the power source switch-on, the AM/FM mode switch over, etc. is equal to that after the power source switch-on.
摘要翻译： 公开了一种FM多径噪声降低电路，其中用于快速充电的电容器连接在电源线和设置在电平移位电路系统中的充电/放电电容器之间，使得电源处的控制输出电压的上升时间常数 电源接通，AM / FM模式切换等与电源接通后相同。
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公开(公告)号：US4685048A
公开(公告)日：1987-08-04
申请号：US838999
申请日：1986-03-12
申请人： Satoru Tazaki
发明人： Satoru Tazaki
CPC分类号： G01R19/22
摘要： An AC-DC transformation circuit according to this invention facilitates operational stability by transforming an AC inputted voltage first into current and then transforming the current into a DC voltage.
摘要翻译： 根据本发明的AC-DC变换电路通过将AC输入电压首先变换为电流，然后将电流变换为直流电压来促进操作稳定性。
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公开(公告)号：US4387469A
公开(公告)日：1983-06-07
申请号：US267951
申请日：1981-05-28
申请人： Takao Miyazaki , Satoru Tazaki
发明人： Takao Miyazaki , Satoru Tazaki
CPC分类号： H03J1/0066
摘要： An automatic tuner control system characterized in that the device comprises a detector for detecting a signal level in a radio receiver, a means for setting a reference signal level and a comparator means for doing comparison between the signal level and the reference signal level. Thus, the device is arranged to switch the received waves of the radio receiver in response to the result of the comparison in the comparator means and various conditions.
摘要翻译： 一种自动调谐器控制系统，其特征在于，该装置包括用于检测无线电接收机中的信号电平的检测器，用于设置参考信号电平的装置和用于在信号电平和参考信号电平之间进行比较的比较器装置。 因此，设备被配置为响应于比较器装置中的比较结果和各种条件来切换无线电接收机的接收波。
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5.发明授权Circuit for controlling separation and high-cut operation of a stereo demodulator in an FM radio receiver 失效用于控制FM无线电接收机中的立体声解调器的分离和高速操作的电路
公开(公告)号：US4710958A
公开(公告)日：1987-12-01
申请号：US860639
申请日：1986-05-07
申请人： Satoru Tazaki
发明人： Satoru Tazaki
CPC分类号： H04H40/72 , H04B1/1669
摘要： A control circuit in an FM radio receiver includes a current mirror circuit which extracts a ripple component caused by a multipath disturbance and superposed on an S-meter output voltage from an intermediate frequency amplifier/detector of the FM radio receiver, and decreases the S-meter output voltage in response to the degree of the ripple component to use the decreased S-meter output voltage as a control voltage for control of separation and high-cut operations of a stereo demodulating stage of the FM radio receiver.
摘要翻译： FM无线电接收机中的控制电路包括电流镜电路，其提取由多径干扰引起的纹波分量，并叠加在来自FM无线电接收机的中频放大器/检测器的S-meter输出电压上，并且减少S- 响应于纹波分量的程度输出电压，使用降低的S米输出电压作为用于控制FM无线电接收机的立体声解调级的分离和高速操作的控制电压。
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