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1. 发明授权

US4855835A AFT circuit for CATV receiver system 失效
标题翻译： AFT电路用于CATV接收机系统
公开(公告)号：US4855835A
公开(公告)日：1989-08-08
申请号：US187223
申请日：1988-04-28
申请人： Katsumi Tobita
发明人： Katsumi Tobita
IPC分类号： H03J7/04 , H04N5/50 , H04B1/26
CPC分类号： H03J7/04 , H04N5/50
摘要： An automatic fine tuning (AFT) circuit for a CATV receiver system of a double conversion type having a first local oscillator and a second local oscillator and a first mixer and a second mixer respectively supplied with oscillation outputs from the first and second local oscillators is disclosed. A reception signal is sequentially subjected to frequency conversation by use of the first and second mixers so as to attain an intermediate frequency signal of a predetermined value. The AFT circuit includes a control voltage generator for outputting a control voltage which is a function of a frequency fluctuation of the intermediate frequency signal; a selector for selecting either the control voltage or a constant voltage and for supplying the selected voltage as an oscillation frequency control voltage controlling the oscillation frequency of the second local oscillator; an integration unit for integrating the oscillation frequency control voltage so as to produce an integrated control voltage; and a voltage comparator for comparing the integrated control voltage with a reference voltage so as to supply a result of the comparison to the selector. In response to the compare result from the voltage comparator, the selector supplies the control voltage to the second local oscillator when the integrated voltage is higher than the reference voltage and supplies the constant voltage to the second local oscillator when the integrated voltage is lower than the reference voltage.
摘要翻译：公开了一种具有第一本地振荡器和第二本地振荡器以及分别由第一和第二本地振荡器提供振荡输出的第一混频器和第二混频器的具有双转换类型的CATV接收机系统的自动微调（AFT）电路。接收信号通过使用第一和第二混频器顺次进行频率通话，以获得预定值的中频信号。 AFT电路包括用于输出作为中频信号的频率波动的函数的控制电压的控制电压发生器; 选择器，用于选择控制电压或恒定电压，并将所选择的电压提供为控制第二本地振荡器的振荡频率的振荡频率控制电压; 积分单元，用于对振荡频率控制电压进行积分，以产生一体化的控制电压; 以及电压比较器，用于将集成控制电压与参考电压进行比较，以将比较结果提供给选择器。响应于电压比较器的比较结果，当积分电压高于参考电压时，选择器将控制电压提供给第二本地振荡器，并且当集成电压低于参考电压时，将恒定电压提供给第二本地振荡器参考电压。

2. 发明授权

US4352205A Tuning system 失效
标题翻译：调音系统
公开(公告)号：US4352205A
公开(公告)日：1982-09-28
申请号：US150296
申请日：1980-05-16
申请人： Masaki Kato , Katsumi Tobita
发明人： Masaki Kato , Katsumi Tobita
IPC分类号： H03J7/28 , H03J5/02 , H03J7/02 , H03J7/06 , H03J7/18 , H03J5/24
CPC分类号： H03J7/065 , H03J5/0281
摘要： A tuning system comprising a memory for storing therein local oscillation frequencies of a plurality of channels to be received and an intermediate frequency, a first control loop circuit for controlling an oscillation frequency of a controlled oscillator on the basis of one local oscillation signal stored in said memory, and a second control loop circuit for controlling a controlled oscillator in such a manner as to render the intermediate frequency of the tuner itself constant on the basis of the intermediate frequency stored in said memory after said first control loop circuit is locked.
摘要翻译：一种调谐系统，包括存储器，用于存储要接收的多个信道的本地振荡频率和中频;第一控制环路电路，用于基于存储在所述接收的一个本地振荡信号来控制受控振荡器的振荡频率存储器和用于控制受控振荡器的第二控制回路电路，以便在所述第一控制环电路被锁定之后，基于存储在所述存储器中的中频来使调谐器本身的中频恒定。

3. 发明授权

US4771457A Subscription television system 失效
标题翻译：订阅电视系统
公开(公告)号：US4771457A
公开(公告)日：1988-09-13
申请号：US051165
申请日：1987-05-12
申请人： Katsumi Tobita
发明人： Katsumi Tobita
IPC分类号： H04K1/00 , G06F21/10 , H04N7/167 , H04N7/171
CPC分类号： H04N7/1713
摘要： A subscription television system sends out a reference level signal together with a timing pulse on the transmitting side and, on the receiving side, extracts the reference level signal and suppresses the signal of a video signal interval, except for a synchronizing pulse interval, on the basis of the extracted reference level signal, whereby a descrambling process is performed.
摘要翻译：订阅电视系统与发送侧的定时脉冲一起发送参考电平信号，并且在接收侧提取参考电平信号并且抑制除了同步脉冲间隔之外的视频信号间隔的信号提取参考电平信号的基础，由此执行解扰处理。

4. 发明授权

US4589017A Pay television receiving system 失效
标题翻译：付费电视接收系统
公开(公告)号：US4589017A
公开(公告)日：1986-05-13
申请号：US363473
申请日：1982-03-30
申请人： Katsumi Tobita
发明人： Katsumi Tobita
IPC分类号： H04N7/167 , H04N7/171
CPC分类号： H04N7/1713
摘要： In a system for receiving a scrambled pay television signal wherein a radio frequency video signal with a horizontal synchronizing signal erased therefrom by elevating portions of the video signal containing picture information and a radio frequency aural signal with a horizontal synchronizing trigger pulse and a data processing trigger pulse superposed thereon are received, the data processing trigger pulses are detected from the radio frequency aural signal and are used for comparison with a code assigned to a pay television receiving subscriber, and the horizontal synchronizing signal is restored on the basis of the horizontal synchronizing trigger pulses when the pay television broadcast is receivable; the improvement comprising a waveform shaping circuit which shapes the horizontal synchronizing trigger pulse and the data processing trigger pulse into desired pulse forms, a clock isolating circuit and a data isolating circuit to which the shaped pulses are applied and which deliver horizontal synchronizing pulses and data pulses respectively, a data comparator which makes the comparison by the use of the data pulses applied thereto, a vertical synchronizing signal-regenerating circuit which delivers a vertical synchronizing pulse, a gate circuit which is controlled by an output of the data comparator and which, when enabled, delivers a signal with the vertical synchronizing pulse added to the horizontal synchronizing pulse, and a switching attenuator which is controlled by the output signal of the gate circuit.
摘要翻译：在一种用于接收加扰付费电视信号的系统中，其中具有通过升高含有图像信息的视频信号的部分和具有水平同步触发脉冲和数据处理触发的射频听觉信号从而擦除水平同步信号的射频视频信号接收其上叠加的脉冲，从射频听觉信号检测数据处理触发脉冲，并用于与分配给付费电视接收用户的代码进行比较，并且基于水平同步触发来恢复水平同步信号付费电视广播应收的脉冲; 该改进包括波形整形电路，其将水平同步触发脉冲和数据处理触发脉冲整形为期望的脉冲形式，时钟隔离电路和数据隔离电路，成形脉冲被施加到该波形整形电路，并且传送水平同步脉冲和数据脉冲分别通过使用施加于其上的数据脉冲进行比较的数据比较器，传送垂直同步脉冲的垂直同步信号再生电路，由数据比较器的输出控制的门电路，将垂直同步脉冲输入到水平同步脉冲的信号，以及由栅极电路的输出信号控制的开关衰减器。

5. 发明授权

US4274066A Quartz crystal oscillator 失效
标题翻译：石英晶体振荡器
公开(公告)号：US4274066A
公开(公告)日：1981-06-16
申请号：US86807
申请日：1979-10-22
申请人： Akiyuki Yoshisato , Katsumi Tobita
发明人： Akiyuki Yoshisato , Katsumi Tobita
IPC分类号： H03B5/32 , H03B5/36 , H03B7/06 , H03L3/00
CPC分类号： H03B5/362 , H03L3/00 , H03B2200/0008 , H03B2200/0052 , H03B2200/0082 , H03B2200/0094 , H03B7/06
摘要： A Colpitts type quartz crystal oscillator comprises a resonant circuit consisting of two capacitors connected in series across a quartz crystal, the latter serving as an inductive element. The resonant circuit is connected between the base and collector of a transistor, with the junction of the capacitors being connected to the emitter of the transistor to provide feedback. Means are provided to increase the gain of the transistor and thereby the driving excitation of the crystal above a normal value for a brief length of time after the oscillator is initially energized.
摘要翻译： Colpitts型石英晶体振荡器包括由两个电容器组成的谐振电路，两个电容器串联连接在石英晶体上，后者用作电感元件。谐振电路连接在晶体管的基极和集电极之间，其中电容器的结连接到晶体管的发射极以提供反馈。提供了在振荡器初始激励之后短时间内增加晶体管的增益，从而使晶体的驱动激励高于正常值的装置。

6. 发明授权

US4692803A CATV converter having phase locked loop for sound carrier wave frequency control 失效
标题翻译：具有用于声载波频率控制的锁相环的CATV转换器
公开(公告)号：US4692803A
公开(公告)日：1987-09-08
申请号：US848731
申请日：1986-04-04
申请人： Katsumi Tobita
发明人： Katsumi Tobita
IPC分类号： H04N5/00 , H04N7/10 , H04N5/06 , H04N7/06 , H04N7/16
CPC分类号： H04N7/10
摘要： A CATV converter has a phase locked loop (PLL) circuit for controlling the sound carrier wave frequency of the audio signal component of the resulting TV signal. The PLL circuit receives as inputs a branched part of the video signal component and a part of the audio signal output of an audio modulator for providing an output control signal to the audio modulator representing a selected frequency difference to be maintained between the video carrier wave frequency of the video signal and the sound carrier wave frequency of the audio signal output of the audio modulator.
摘要翻译： CATV转换器具有用于控制所得TV信号的音频信号分量的声载波频率的锁相环（PLL）电路。 PLL电路接收视频信号分量的分支部分和音频调制器的音频信号输出的一部分作为输入，以向输入控制信号提供表示所选择的频差的音频调制器，以保持视频载波频率的音频调制器的音频信号输出的声音载波频率。

7. 发明授权

US4723287A Demodulating system for multivoice system 失效
标题翻译：多发系统解调系统
公开(公告)号：US4723287A
公开(公告)日：1988-02-02
申请号：US914008
申请日：1986-10-01
申请人： Katsumi Tobita , Tamaki Yoshimoto
发明人： Katsumi Tobita , Tamaki Yoshimoto
IPC分类号： H04H1/00 , H04H40/36 , H04N5/60 , H04H5/00
CPC分类号： H04H20/88 , H04N5/607
摘要： A demodulating system for the multivoice TV system, which is constituted so that a tuner is tuned to receive the sum signal and the difference signal of an aural signal and a pilot signal which are transmitted together with a video signal, the selected signal is given to an intercarrier demodulator and an aural signal band-pass filter, the intercarrier demodulator provides a beat signal corresponding to the difference between the video carrier and the sound subcarrier, the beat signal is demodulated to obtain the sum signal, and the sound subcarrier provided by the sound signal band-pass filter is demodulated to obtain the difference signal and the pilot signal. The demodulating system is intended to eliminate disturbing signals included in the composite signal and buzzing, and to obviate the malfunction of the MPX decoder due to the disturbing signal having the same frequency as that of the pilot signal.
摘要翻译：一种用于多传播电视系统的解调系统，其被构造成使得调谐器被调谐以接收与视频信号一起发送的和信号和听觉信号和导频信号的差分信号，所选择的信号被给予载波解调器和听觉信号带通滤波器，帧载波解调器提供与视频载波和声音副载波之间的差分相对应的拍频信号，对该信号进行解调以获得和信号，并且由声信号带通滤波器被解调以获得差分信号和导频信号。解调系统旨在消除复合信号中包含的干扰信号和嗡嗡声，并且由于干扰信号具有与导频信号相同的频率，从而消除MPX解码器的故障。

8. 发明授权

US4514757A CATV selection device 失效
标题翻译：有线电视选择装置
公开(公告)号：US4514757A
公开(公告)日：1985-04-30
申请号：US279689
申请日：1981-07-02
申请人： Tasuku Noji , Katsumi Tobita
发明人： Tasuku Noji , Katsumi Tobita
IPC分类号： H03J5/12 , H03J5/24 , H04B1/26 , H04N5/44 , H04N7/10 , H04N7/16 , H04N5/782
CPC分类号： H04N7/102 , H04N5/44 , H04N7/10
摘要： A CATV selection device adapted to convert the desired CATV signal into a vacant channel frequency of the TV set and to deliver the vacant channel frequency as an output to make it possible to watch the desired CATV broadcasting. The device has an input terminal adapted to receive both of the TV broadcasting signal and the CATV broadcasting signal, an output terminal for delivering the broadcasting signal to the input terminal of a TV set, a conversion circuit adapted to receive the CATV broadcasting signal corresponding to the selected channel into the vacant channel frequency of the TV set, and electronic switch circuit adapted to effect a switching between a first mode in which the broadcasting signal from said input terminal is bypassed to the output terminal and a second mode in which the same broadcasting signal is delivered to the conversion circuit, and a selection section having push buttons for selecting the desired CATV broadcasting channel and a bypass button for bypassing the broadcasting signal from the input terminal to the output terminal.
摘要翻译：一种CATV选择装置，适于将期望的CATV信号转换成电视机的空闲信道频率，并将空闲信道频率作为输出传送，以便观看所需的CATV广播。该装置具有适于接收电视广播信号和CATV广播信号两者的输入端，用于将广播信号传送到电视机的输入端的输出端，转换电路，适于接收对应于所选择的频道进入电视机的空闲频道频率，以及电子开关电路，其适于在所述输入终端的广播信号被旁路到所述输出终端的第一模式和第二模式之间进行切换，在所述第二模式中，信号被传送到转换电路，以及具有用于选择所需CATV广播频道的按钮的选择部分和用于将广播信号从输入端子旁路到输出端子的旁路按钮。

9. 发明授权

US4517595A Pay television channel selector 失效
标题翻译：付费电视频道选择器
公开(公告)号：US4517595A
公开(公告)日：1985-05-14
申请号：US311061
申请日：1981-10-13
申请人： Katsumi Tobita
发明人： Katsumi Tobita
IPC分类号： H04N5/44 , H04N7/10 , H04N7/16 , H04K1/00
CPC分类号： H04N7/162
摘要： In a pay television channel selector, a reception contract selecting portion comprises parallel circuits which are disposed in correspondence with channels and whose impedances are made different between the contracted and uncontracted channels, and a control circuit device whose output level changes depending upon the impedances of the parallel circuits, so that the scrambled broadcast of the contracted channel is descrambled on the basis of the output control signal of the control circuit device. The tapping of the uncontracted channel ascribable to the imperfection of a double lock preventive mechanism of multi-throw switches used as channel selecting switches can be prevented.
摘要翻译：在付费电视频道选择器中，接收合同选择部分包括并行电路，它们与信道相对设置，并且其在收缩和非收缩频道之间的阻抗不同;以及控制电路装置，其输出电平根据并联电路，使得根据控制电路装置的输出控制信号对合同信道的加扰广播进行解扰。可以防止由于用作通道选择开关的多掷开关的双锁定防止机构的缺陷而引起的非承受通道的攻丝。

10. 发明授权

US4224580A Quartz crystal oscillator 失效
标题翻译：石英晶体振荡器
公开(公告)号：US4224580A
公开(公告)日：1980-09-23
申请号：US958246
申请日：1978-11-06
申请人： Akiyuki Yoshisato , Katsumi Tobita
发明人： Akiyuki Yoshisato , Katsumi Tobita
IPC分类号： H03B5/32 , H03B5/36 , H03B7/06 , H03L3/00 , H03B5/06
CPC分类号： H03B5/362 , H03L3/00 , H03B2200/0008 , H03B2200/0052 , H03B2200/0082 , H03B2200/0094 , H03B7/06
摘要： A Colpitts type quartz crystal oscillator comprises a resonant circuit consisting of two capacitors connected in series across a quartz crystal, the latter serving as an inductive element. The resonant circuit is connected between the base and collector of a transistor, with the junction of the capacitors being connected to the emitter of the transistor to provide feedback. Means are provided to increase the gain of the transistor and thereby the driving excitation of the crystal above a normal value for a brief length of time after the oscillator is initially energized.
摘要翻译： Colpitts型石英晶体振荡器包括由两个电容器组成的谐振电路，两个电容器串联连接在石英晶体上，后者用作电感元件。谐振电路连接在晶体管的基极和集电极之间，其中电容器的结连接到晶体管的发射极以提供反馈。提供了在振荡器初始激励之后短时间内增加晶体管的增益，从而使晶体的驱动激励高于正常值的装置。

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