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1. 发明授权

US4179650A Variable impedance circuits 失效
标题翻译：可变阻抗电路
公开(公告)号：US4179650A
公开(公告)日：1979-12-18
申请号：US864266
申请日：1977-12-27
申请人： Isao Fukushima , Akihiro Asada , Kazuya Takahashi
发明人： Isao Fukushima , Akihiro Asada , Kazuya Takahashi
IPC分类号： H01L29/66 , H03G1/00 , H03H11/24 , H03H11/46 , G05F1/48
CPC分类号： H03H11/46 , H03G1/0035 , H03G1/0082 , H03H11/24
摘要： A variable impedance circuit comprises a differential current circuit having a diode and a first transistor connected so as to operate differentially with respect to each other, and a current control circuit for controlling current flowing through the differential current circuit, whereby variation of the operative resistance of the differential current circuit causes variation of impedance thereof. The current control circuit comprises a second transistor having a collector connected with the differential connection of the differential current circuit, and an emitter grounded via a resistor, and a third transistor having a base applied with a control voltage and an emitter connected with the emitter of the second transistor. A fourth transistor is also provided having a collector connected to the base of the second transistor, a base connected to the collector of the third transistor and an emitter applied with source voltage independently from the current flowing through the differential current circuit. The current control circuit is connected with the differential current circuit through only the collector of the second transistor to establish a high impedance of the current control circuit as seen by the differential current circuit.
摘要翻译：可变阻抗电路包括具有二极管和第一晶体管的差分电流电路，所述第二晶体管被连接成相对于彼此差分地工作;以及电流控制电路，用于控制流过差分电流电路的电流，由此，差分电流电路导致其阻抗的变化。电流控制电路包括第二晶体管，其具有与差分电流电路的差分连接的集电极，以及通过电阻器接地的发射极，以及具有施加有控制电压的基极和与发射极连接的发射极的第三晶体管第二晶体管。还提供第四晶体管，其具有连接到第二晶体管的基极的集电极，连接到第三晶体管的集电极的基极和独立于流过差分电流电路的电流施加源电压的发射极。电流控制电路仅通过第二晶体管的集电极与差分电流电路连接，以建立电流控制电路的高阻抗，如差分电流电路所示。

2. 发明授权

US4847742A Multi-channel inverter circuit 失效
标题翻译：多通道逆变电路
公开(公告)号：US4847742A
公开(公告)日：1989-07-11
申请号：US153209
申请日：1988-02-08
申请人： Shin-ichi Ohashi , Isao Fukushima
发明人： Shin-ichi Ohashi , Isao Fukushima
IPC分类号： H02M3/335 , H02M3/337
CPC分类号： H02M3/33561 , H02M3/337
摘要： The invention is to provide a more economical and practical multi-channel inverter with reference particularly to a modulation process of the time width, wherein a DC output is fed to each of a multiplicity of output channel circuits through time division to a multi-channeling, each of the time widths is modulated pertinently according to each output, thereby obtaining DC and AC multi-channel outputs independently of each other between said channels.
摘要翻译：本发明是为了提供一种更加经济实用的多通道逆变器，特别参考时间宽度的调制过程，其中DC输出通过时分到多通道馈送到多个输出通道电路中的每一个，每个时间宽度根据每个输出适当调制，从而在所述通道之间彼此独立地获得DC和AC多通道输出。

3. 发明授权

US4682096A Switching regulator system for a motor driving circuit 失效
标题翻译：用于电机驱动电路的开关稳压器系统
公开(公告)号：US4682096A
公开(公告)日：1987-07-21
申请号：US786500
申请日：1985-10-11
申请人： Hideo Nishijima , Takayasu Ito , Isao Fukushima
发明人： Hideo Nishijima , Takayasu Ito , Isao Fukushima
IPC分类号： H02P6/04 , H02P6/06 , H02P6/08 , H02P5/28
CPC分类号： H02P6/08
摘要： A motor driving circuit includes an equivalent power PNP transistor constituted by a Darlington connection of a small-current PNP transistor and a large-current NPN transistor, and a switching regulator of a step-down and variable type is provided between the collector of the NPN transistor and the emitter of the PNP transistor. Electric power loss in the motor driving circuit can be reduced, and the electric power required to operate the motor driving circuit can be saved.
摘要翻译：电动机驱动电路包括由小电流PNP晶体管和大电流NPN晶体管的达林顿连接构成的等效功率PNP晶体管，并且在NPN的集电极之间设置降压型和可变型的开关调节器晶体管和PNP晶体管的发射极。可以减少电动机驱动电路中的电力损失，并且可以节省操作电动机驱动电路所需的电力。

4. 发明授权

US4667168A Integrated circuit with a phase-locked loop 失效
标题翻译：具有锁相环的集成电路
公开(公告)号：US4667168A
公开(公告)日：1987-05-19
申请号：US839535
申请日：1986-03-14
申请人： Makoto Shiomi , Kuniaki Miura , Isao Fukushima , Eiji Moro , Shigeaki Kanenari
发明人： Makoto Shiomi , Kuniaki Miura , Isao Fukushima , Eiji Moro , Shigeaki Kanenari
IPC分类号： H03L7/08 , H03H11/04 , H03L7/06 , H03L7/00
CPC分类号： H03L7/0805 , H03L7/06
摘要： The IC chip consists of electronic circuits wherein voltage control oscillator whose oscillation frequency is dependent on the product of the resistance value of a resistor element and the electrostatic capacity of a capacitor element is provided; said capacitor element consists of the first variable capacitor; said voltage control oscillator comprises said capacitor consisting of said first variable capacitor; said first variable capacitor is controlled by the output obtained by detecting the output signal of said voltage control oscillator by its phase, using the predetermined reference signal, whereby the oscillation frequency of said voltage control oscillator can be made to agree with the frequency of said reference signal. Furthermore, the characteristic of said electronic circuit is dependent on a second resistor element and a second variable capacitor element; said second variable capacitor is controlled by the output obtained by the phase detection so that dispersions of the resistance value of the resistor element and the electrostatic capacity of the capacitor element in said electronic circuit are absorbed automatically.
摘要翻译：该IC芯片由电子电路构成，其中电压控制振荡器的振荡频率取决于电阻元件的电阻值与电容器元件的静电电容的乘积; 所述电容器元件由第一可变电容器组成; 所述电压控制振荡器包括由所述第一可变电容器组成的所述电容器; 所述第一可变电容器由通过使用所述预定参考信号检测所述压控振荡器的输出信号而得到的输出来控制，由此可以使所述压控振荡器的振荡频率与所述基准的频率一致信号。此外，所述电子电路的特性取决于第二电阻元件和第二可变电容器元件; 所述第二可变电容器由通过相位检测获得的输出控制，使得电阻元件的电阻值和所述电子电路中的电容器元件的静电电容的分散被自动吸收。

5. 发明授权

US4647960A Vertical contour emphasis de-emphasis circuit 失效
标题翻译：垂直轮廓强调去加重电路
公开(公告)号：US4647960A
公开(公告)日：1987-03-03
申请号：US777288
申请日：1985-09-18
申请人： Kuniaki Miura , Yasufumi Yunde , Kazunori Kotani , Isao Fukushima , Kenji Kano
发明人： Kuniaki Miura , Yasufumi Yunde , Kazunori Kotani , Isao Fukushima , Kenji Kano
IPC分类号： H04N5/21 , H03G7/00 , H04N5/14 , H04N5/205 , H04N5/922 , H04N5/923 , H04N9/64 , H04N5/208
CPC分类号： H04N5/142 , H04N5/923 , H04N9/646
摘要： Disclosed is a circuit for emphasizing a video signal in the vertical direction of a television picture for minimizing noise appearing during reproduction. In the circuit, a signal obtained by delaying an input video signal by one horizontal scanning period is positively fed back through a feedback circuit to the input of the input video signal. An amplitude difference signal between the video signal after being fed back through a positive feedback loop and the delayed video signal is produced and added to the input video signal to provide an output video signal.
摘要翻译：公开了一种用于在电视图像的垂直方向上强调视频信号以减少再现期间出现噪声的电路。在该电路中，通过将输入视频信号延迟一个水平扫描周期而获得的信号通过反馈电路被反馈到输入视频信号的输入。产生通过正反馈回路反馈的视频信号与延迟视频信号之间的振幅差信号，并将其相加到输入视频信号以提供输出视频信号。

6. 发明授权

US4494056A Motor driving circuit 失效
标题翻译：电机驱动电路
公开(公告)号：US4494056A
公开(公告)日：1985-01-15
申请号：US480372
申请日：1983-03-30
申请人： Hideo Nishijima , Katsumi Sera , Isao Fukushima , Yasunori Kobori
发明人： Hideo Nishijima , Katsumi Sera , Isao Fukushima , Yasunori Kobori
IPC分类号： H02P3/06 , H02P6/04 , H02P6/06 , H02P6/08 , H02P6/24 , H02P3/20
CPC分类号： H02P3/06 , H02P6/085 , H02P6/24
摘要： A motor driving circuit in which the opposite ends of the motor driving coils of a video tape recorder (VTR) capstan motor are shorted by a group of switching elements when a control input voltage generated from a rotation detection/oscillator is in a predetermined range.
摘要翻译：当从旋转检测/振荡器产生的控制输入电压处于预定范围内时，电动机驱动电路，其中磁带录像机（VTR）主导马达的电机驱动线圈的相对端被一组开关元件短路。

7. 发明授权

US4198541A Signal holding circuit 失效
标题翻译：信号保持电路
公开(公告)号：US4198541A
公开(公告)日：1980-04-15
申请号：US875797
申请日：1978-02-07
申请人： Isao Fukushima
发明人： Isao Fukushima
IPC分类号： H04B1/10 , H03G3/34 , H03K5/1252 , H03K17/16 , H03K17/60
CPC分类号： H03K17/16 , H03G3/345
摘要： A signal holding circuit is disclosed in which a parallel circuit of a constant current source circuit comprising a transistor having a constant voltage supplied to a base thereof and a hold capacitor is connected to an emitter follower transistor, a first control transistor is connected between a base of the emitter follower transistor and ground, a second control transistor is connected between the base of the transistor of the constant current source circuit and ground, and a control pulse corresponding in time to a duration of the pulsive noise is applied to the bases of the first and second control transistors to render the first and second control transistors conductive only during the application of the control pulse so that a charging time constant of the hold capacitor during the conduction of the emitter follower transistor is reduced and a discharging time constant of the hold capacitor during the cutoff of the emitter follower capacitor is increased.
摘要翻译：公开了一种信号保持电路，其中包括具有提供给其基极的恒定电压的晶体管和保持电容器的恒流源电路的并联电路连接到射极跟随器晶体管，第一控制晶体管连接在基极的射极跟随器晶体管和接地，第二控制晶体管连接在恒流源电路的晶体管的基极和地之间，并且在时间上对应于脉冲噪声的持续时间的控制脉冲被施加到第一和第二控制晶体管，以使得第一和第二控制晶体管仅在施加控制脉冲期间导通，使得在射极跟随器晶体管导通期间保持电容器的充电时间常数减小，并且保持的放电时间常数在射极跟随电容器截止期间的电容器增加。

8. 发明授权

US4724407A Integrated filter circuit having switchable selected parallel filter paths 失效
标题翻译：集成滤波器电路具有可切换的选择的并行滤波器路径
公开(公告)号：US4724407A
公开(公告)日：1988-02-09
申请号：US863244
申请日：1986-05-14
申请人： Kuniaki Miura , Isao Fukushima , Yoshinori Okada , Mitsuru Kudo , Takashi Kubota
发明人： Kuniaki Miura , Isao Fukushima , Yoshinori Okada , Mitsuru Kudo , Takashi Kubota
IPC分类号： H03H7/06 , H03H11/04 , H03H11/12 , H03H7/065
CPC分类号： H03H11/04 , H03H11/1295
摘要： An integrated filter circuit including at least integrated resistances and integrated capacitances, said integrated filter circuit comprising a plurality of filter circuits connected in parallel and in which at least either resistance values or capacitance values are different, a switch for switching said parallel filter circuits, and means for controlling said switch to select one of said parallel filter circuits.
摘要翻译：一种集成滤波电路，包括至少集成电阻和集成电容，所述集成滤波电路包括并联连接的多个滤波电路，至少电阻值或电容值不同，用于切换所述并联滤波电路的开关，以及用于控制所述开关以选择所述并行滤波器电路之一的装置。

9. 发明授权

US4691246A Apparatus for multiplex recording and reproduction of audio and video signals 失效
标题翻译：音频和视频信号的复用记录和再现装置
公开(公告)号：US4691246A
公开(公告)日：1987-09-01
申请号：US677243
申请日：1984-12-03
申请人： Kuniaki Miura , Yoshinori Okada , Isao Fukushima , Susumu Otsuka
发明人： Kuniaki Miura , Yoshinori Okada , Isao Fukushima , Susumu Otsuka
IPC分类号： G11B20/06 , H04N9/802 , H04N9/83 , H04N9/835 , H04N5/782
CPC分类号： H04N9/802 , H04N9/8355
摘要： A recording circuit for a video tape recorder which records superposedly a frequency-modulated audio signal with a frequency-modulated luminance signal and a carrier color signal converted to a low frequency band records a carrier wave signal which is frequency-modulated by the luminance signal at a substantially constant recording current within the frequency range corresponding to a range from the sync signal leading edge to the white peak. In an ordinary recording circuit, the extent of erasure of the recorded audio signal varies with the content of the frequency-modulated luminance signal when the luminance signal is recorded on the recording track of the frequency-modulated audio signal, because recording is made by increasing a recording current for a signal having an instantaneous frequency which is low. Therefore, the recorded signal which is frequency-modulated by the audio signal is amplitude-modulated by the luminance signal, and interference with the audio signal due to the change of S/N corresponding to the change of the amplitude occurs. In the recording circuit of the present invention, however, no interference is applied to the audio signal because the extent of erasure of the recorded audio signal by the luminance signal remains substantially constant irrespective of the content of the luminance signal.
摘要翻译：一种用于记录频率调制的音频信号与频率调制的亮度信号和转换为低频带的载波颜色信号的记录电路，记录由亮度信号频率调制的载波信号在对应于从同步信号前沿到白色峰值的范围内的频率范围内的基本恒定的记录电流。在通常的记录电路中，当记录在调频音频信号的记录轨道上时，记录的音频信号的擦除程度随着调频亮度信号的内容而变化，因为通过增加记录用于瞬时频率低的信号的记录电流。因此，由音频信号进行了频率调制的记录信号由亮度信号进行幅度调制，并且由于与幅度变化相对应的S / N的变化引起的与音频信号的干扰发生。然而，在本发明的记录电路中，由于亮度信号的记录音频信号的擦除程度与亮度信号的内容无关，所以不会对音频信号施加干扰。

10. 发明授权

US4607293A Magnetic recording and reproduction system 失效
标题翻译：磁记录和再现系统
公开(公告)号：US4607293A
公开(公告)日：1986-08-19
申请号：US556047
申请日：1983-11-29
申请人： Yoshinori Okada , Kuniaki Miura , Isao Fukushima
发明人： Yoshinori Okada , Kuniaki Miura , Isao Fukushima
IPC分类号： G11B5/02 , G11B5/008 , G11B5/027 , G11B5/53 , H04N5/7826 , H04N9/79 , H04N9/802 , H04N9/835 , H04N5/782
CPC分类号： H04N9/7921 , G11B5/008 , H04N5/78263 , H04N9/802 , H04N9/8355
摘要： A magnetic recording and reproduction system of a helical scanning type provided with audio heads which rotate together with the rotary video heads so that the frequency-modulated audio signal is recorded by the audio heads on the video track on which the video signal will also be recorded. The audio signal is recorded first on the video track, and then the video signal is recorded over the record of the audio signal, whereby the audio signal has an expanded frequency band thereby to provide an improved sound quality.
摘要翻译：具有螺旋扫描型的磁记录和再现系统，其具有与旋转视频头一起旋转的音频头，使得调频音频信号由音频头记录在视频信号上也将被记录在其上的视频轨道上。音频信号首先记录在视频轨道上，然后视频信号被记录在音频信号的记录上，由此音频信号具有扩展的频带，从而提供改善的声音质量。

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