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公开(公告)号：US4761814A
公开(公告)日：1988-08-02
申请号：US876601
申请日：1986-06-20
申请人： Yoshiro Sugai , Hiroyuki Kimura
发明人： Yoshiro Sugai , Hiroyuki Kimura
CPC分类号： H04N5/607
摘要： A multivoice demodulator circuit in which a sub-signal is separated from the main signal. The sub-signal may have different content and characteristic dependent upon the reception mode of the original signal. The sub-signal is given different frequency characteristics dependent upon the reception mode.
摘要翻译： 多信号解调电路，其中副信号与主信号分离。 子信号可能具有取决于原始信号的接收模式的不同内容和特性。 子信号根据接收模式被赋予不同的频率特性。
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公开(公告)号：US4742393A
公开(公告)日：1988-05-03
申请号：US717880
申请日：1985-03-29
申请人： Yoshiro Sugai , Hiroyuki Kimura
发明人： Yoshiro Sugai , Hiroyuki Kimura
摘要： A signal receiving system for a TV receiver incorporates at least two independent front end circuits for frequency-converting antenna signals to a lower frequency, with the output signals from these front end circuits being utilized separately to derive the video and audio signal components of the TV signal. Independent control of AGC applied to the audio and video signal components respectively can thereby be implemented, or, in the case of diversity reception using two or more antennas, the optimum antenna for reception of the video and audio signal components respectively can be selected in a mutually independent manner, to thereby attain substantially improved diversity reception, e.g. for a TV installation in a moving vehicle.
摘要翻译： 用于TV接收机的信号接收系统包括至少两个用于将天线信号频率转换为较低频率的独立前端电路，来自这些前端电路的输出信号被单独使用以导出TV的视频和音频信号分量 信号。 因此可以分别实施对音频和视频信号分量的AGC的独立控制，或者在使用两个或更多个天线的分集接收的情况下，分别用于接收视频和音频信号分量的最佳天线可以在 相互独立的方式，从而获得显着改善的分集接收，例如 用于在移动车辆中进行电视安装。
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公开(公告)号：US4703501A
公开(公告)日：1987-10-27
申请号：US864656
申请日：1986-05-19
申请人： Yoshiro Sugai , Hiroyuki Kimura
发明人： Yoshiro Sugai , Hiroyuki Kimura
CPC分类号： H04H40/63 , H03G3/342 , H04B1/1646 , H04H40/72
摘要： A multiplex sound receiver in which a detection signal is extracted from a broadcast to indicate whether the broadcast is monaural, stereo, or multi-lingual. The detection signal is used for controlling the separating of the channels. According to the invention, the detection signal is processed in accordance with the strength of the broadcast or the noise level. For instance, the detection signal is integrated over a period that is increased when the field strength decreases.
摘要翻译： 一种多路复用声音接收器，其中从广播中提取检测信号以指示广播是单声道，立体声还是多语言。 检测信号用于控制通道的分离。 根据本发明，根据广播的强度或噪声水平来处理检测信号。 例如，当场强降低时，检测信号在增加的周期内被积分。
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公开(公告)号：US4800434A
公开(公告)日：1989-01-24
申请号：US909392
申请日：1986-09-19
申请人： Yoshiro Sugai , Hiroyuki Kimura
发明人： Yoshiro Sugai , Hiroyuki Kimura
摘要： A power source for an electronically tuned tuner in which a horizontal deflection circuit supplies high voltage power to a fly-back transformer, supplying power to the tuner, when a television signal is received but otherwise a battery source is switched into supplying the tuner. The change-over circuit may be realized by a relay, by transistors or by diodes.
摘要翻译： 一种用于电子调谐调谐器的电源，其中当接收到电视信号时，水平偏转电路将高压电力提供给回扫变压器，向调谐器供电，而另外将电池电源切换到供应调谐器。 转换电路可以由继电器，晶体管或二极管实现。
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公开(公告)号：US4737991A
公开(公告)日：1988-04-12
申请号：US861184
申请日：1986-05-09
申请人： Yoshiro Sugai , Hiroyuki Kimura
发明人： Yoshiro Sugai , Hiroyuki Kimura
CPC分类号： H04H40/63 , H04B1/1676 , H04H40/72 , H04N5/607
摘要： In a sound multiplex television tuner, when the input field strength becomes smaller than a certain value, a level control means continuously attenuates the sub signal demodulation output with the aid of the field strength detection signal which a field strength detector circuit provides according to the input field strength. The characteristic of response to input field strength of the level control means is switched, according to a given sound multiplex mode, so that its operation becomes most suitable for the sound multiplex mode, thereby to suppress the noise without causing the television viewer to feel a sense of incongruity in the perceived sound.
摘要翻译： 在声音多路复用电视调谐器中，当输入场强变得小于一定值时，电平控制装置借助场强检测电路根据输入的场强检测信号连续衰减子信号解调输出 场强。 根据给定的声音多路复用模式来切换对电平控制装置的输入场强的响应的特性，使得其操作变得最适合于声音多路复用模式，从而抑制噪声而不会使电视观看者感觉到 感觉到的声音中的不协调感。
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公开(公告)号：US4680793A
公开(公告)日：1987-07-14
申请号：US726753
申请日：1985-04-24
申请人： Yoshiro Sugai , Hiroyuki Kimura
发明人： Yoshiro Sugai , Hiroyuki Kimura
CPC分类号： H04H40/54 , H03D1/2236 , H04B1/1676 , H04H40/72 , H04N5/607
摘要： A noise eliminating circuit including a subsignal modulator circuit, a matrix circuit, and sample-and-hold circuits, for reducing signal distortion as well as preventing the in-circuit generation of noise. The sample-and-hold circuits are disposed in the signal paths of a main signal and the demodulated subsignal and are operated by a signal synchronous with a noise component. The holding times of the two sample-and-hold circuits may be made different from one another.
摘要翻译： 一种噪声消除电路，包括子信号调制器电路，矩阵电路和采样保持电路，用于降低信号失真以及防止噪声的电路内产生。 采样和保持电路设置在主信号和解调的次信号的信号路径中，并由与噪声分量同步的信号操作。 两个采样保持电路的保持时间可以彼此不同。
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公开(公告)号：US4246441A
公开(公告)日：1981-01-20
申请号：US20685
申请日：1979-03-15
申请人： Yoshiro Sugai , Eizi Ueno
发明人： Yoshiro Sugai , Eizi Ueno
CPC分类号： H04H40/72 , H03G3/345 , H04B1/1653
摘要： An FM receiver including a noise pulse detection circuit which receives an FM detected signal containing a pilot signal and produces a control signal when a noise pulse is detected. A gate is operable to interrupt the transmission of the FM detected signal to the subsequent stage for the duration of the presence of the noise pulse responsive to the control signal and a holding circuit holds the FM detected signal of the level immediately before the interrupting operation of the gate. A multiplex demodulator receives outputs of the gate and the holding circuit for demodulating an applied FM detected signal. A signal generator is provided in the multiplex demodulator for generating a signal whose frequency and phase are same as those of the pilot signal. A superimposing circuit superimposes a signal obtained from the signal generator on the output of the holding circuit for the duration of the presence of the noise pulse.
摘要翻译： 一种FM接收机，包括噪声脉冲检测电路，其接收包含导频信号的FM检测信号，并在检测到噪声脉冲时产生控制信号。 响应于控制信号，门可操作以中断在存在噪声脉冲的持续时间期间将FM检测到的信号传输到后级，并且保持电路将紧接在中断操作之前的电平的FM检测信号保持 大门。 复用解调器接收门和保持电路的输出，以解调所应用的FM检测信号。 在多路解调器中提供信号发生器，用于产生其频率和相位与导频信号相同的信号。 在存在噪声脉冲的持续时间内，叠加电路将从信号发生器获得的信号叠加在保持电路的输出上。
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公开(公告)号：US4157455A
公开(公告)日：1979-06-05
申请号：US815749
申请日：1977-07-14
CPC分类号： H04H40/72 , H03G3/20 , H03G3/341 , H04B1/10 , H04B1/1661
摘要： An FM stereophonic receiver includes a muting circuit for interrupting or reducing its signal reproduction output according to the electric field strength and a mode changing circuit for changing its reproduction mode to a stereophonic reproduction mode or a monaural reproduction mode according to the electric field strength. In the receiver, manual switches are operated to switch the muting operation point of the muting circuit and the stereophonic and monaural change-over point of the mode changing circuit, whereby the signal reproduction conditions can be suitably selected according to the choice or wish of a user.
摘要翻译： FM立体声接收机包括用于根据电场强度中断或减少其信号再现输出的静噪电路和用于根据电场强度将其再现模式改变为立体声再现模式或单声道再现模式的模式改变电路。 在接收机中，操作手动开关来切换模式切换电路的静音电路的静音操作点和立体声和单声道转换点，从而可以根据选择或愿望来适当地选择信号再现条件 用户。
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公开(公告)号：US4107614A
公开(公告)日：1978-08-15
申请号：US777802
申请日：1977-03-15
申请人： Yoshiro Sugai
发明人： Yoshiro Sugai
摘要： A muting control circuit for an FM receiver provides rapid on-off response during channel selection or tuning, and rapid on but delayed off response during listening, whereby annoying muting circuit switching is reduced. The delay is implemented by rapidly charging a capacitor when the muting is switched on, and then allowing the relatively slower discharge of the capacitor to prolong the muting operation after the control signal therefore is terminated.
摘要翻译： 用于FM接收机的静音控制电路在频道选择或调谐期间提供快速的开关响应，并且在收听期间提供快速开启但延迟的响应，由此减少了烦人的静音电路切换。 通过在静音接通时对电容器进行快速充电来实现延迟，然后在控制信号终止之后允许电容器的相对较慢的放电来延长静音操作。
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公开(公告)号：US4087641A
公开(公告)日：1978-05-02
申请号：US782581
申请日：1977-03-29
申请人： Yoshiro Sugai
发明人： Yoshiro Sugai
CPC分类号： H03G5/22 , H04B1/1661
摘要： A noise limiting circuit for an FM stereo receiver comprises a filter circuit 13 for grounding high frequency components in the detector output signal through a transistor switch 14 in response to a low field strength signal supplied by the IF amplifier. The filter circuit, when activated, also grounds the 19 KHz pilot signal to automatically switch from a stereo to monaural mode, which further improves the S/N ratio. The pilot signal grounding effect may be enhanced by including an inductor in the filter circuit which, in combination with the filter capacitor, is tuned to the pilot signal frequency. The transistor 14 is switched in a rapid on -- slow off mode by providing a storage capacitor 20 and discharge resistors 17, 19 in the base control circuit of the transistor, and the filter switching or squelch level may be adjusted by a variable resistor 22.
摘要翻译： 用于FM立体声接收机的噪声限制电路包括滤波电路13，用于响应于由IF放大器提供的低场强信号，通过晶体管开关14接地检测器输出信号中的高频分量。 滤波电路在被激活时也使19KHz导频信号自动从立体声切换到单声道模式，这进一步提高了S / N比。 可以通过在滤波器电路中包括电感器来提高导频信号接地效应，该电感器与滤波电容器组合被调谐到导频信号频率。 通过在晶体管的基极控制电路中设置存储电容器20和放电电阻器17,19，晶体管14被切换成快速导通 - 关断模式，并且可以通过可变电阻器22来调节滤波器开关或静噪电平。
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