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51. 发明公开

EP0146906A2 Speed and phase control system 有权
标题翻译：速度和相位控制系统。
公开(公告)号：EP0146906A2
公开(公告)日：1985-07-03
申请号：EP84115650.8
申请日：1984-12-17
申请人： HITACHI, LTD.
发明人： Kobori, Yasunori , Okamoto, Kaneyuki , Fukushima, Isao , Sekiya, Masataka , Nishijima, Hideo , Kano, Kenji , Sakae, Tetsuo
IPC分类号： G05D13/62
CPC分类号： H02P23/186 , Y10S388/912 , Y10S388/922
摘要： Disclosed is a speed and phase control system for a moving apparatus driven by an electric motor, or the like, and provided with a speed control system (22, 23) for controlling the moving apparatus to an initially set speed, a phase control system (25) for synchronizing the phase of the moving apparatus with a reference signal (29), and an error correction device (24) storing therein a target value of and for comparing an actual speed or a phase of the moving apparatus with the target value to detect an error therebetween to thereby correct the initially set value in accordance with the error, whereby control is made such that the moving apparatus is operated at the target value of speed and phase thereof. Further, the error correction device is cut off from the speed control system when the speed reaches a value near the target value and at the same time the operation of the phase control system is started.

52. 发明公开

EP0137462A2 Integrated filter circuit 失效
标题翻译：集成滤波电路。
公开(公告)号：EP0137462A2
公开(公告)日：1985-04-17
申请号：EP84111944.9
申请日：1984-10-05
申请人： HITACHI, LTD.
发明人： Miura, Kuniaki , Fukushima, Isao , Okada, Yoshinori , Kudo, Mitsuru , Kubota, Takashi
IPC分类号： H03H11/12 , H03J7/02 , H03J5/24
CPC分类号： H03H11/04 , H03H11/1295
摘要： An integrated filter circuit including at least integrated resistances (R1 to R6) and integrated capacitances (C1 to C6), said integrated filter circuit comprising a plurality of filter circuits (2, 3) connected in parallel and in which at least either resistance values or capacitance values are different, a switch (4, 5) for switching said parallel filter circuits (2, 3), and means for controlling said switch to select one of said parallel filter circuits (2, 3).

53. 发明公开

EP0129055A2 Method and apparatus for controlling a still reproduction of a video tape recorder 失效
标题翻译： Verfahren undGerätzur Steuerung der Stehbildwiedergabe einesVideobandaufzeichnungsgerätes。
公开(公告)号：EP0129055A2
公开(公告)日：1984-12-27
申请号：EP84105484.4
申请日：1984-05-15
申请人： HITACHI, LTD.
发明人： Okamoto, Kaneyuki , Kobori, Yasunori , Sekiya, Masataka , Fukushima, Isao , Kano, Kenji , Kubota, Takashi
IPC分类号： G11B15/02 , G11B15/18 , G11B27/10 , H04N5/783
CPC分类号： G11B15/1875
摘要： A method and apparatus for reproducing a still picture without a noise bar from a magnetic tape in a video tape recoder. The magnetic tape is stopped in a moment at a leading edge of a rotating phase detecting signal of rotating heads or a reproduced control signal generated after a still reproduction command signal, and it is detected whether the nose bar exists within a vertical blanking period or not in a still reproduction state. If the noise bar exists within the vertical blanking period, the still reproduction state is continued. In the case that the noise bar does not exist within the vertical blanking period, the magnetic tape is run at a slow speed, and when the noise bar gets into the vertical blanking period, the feeding of the magnetic tape is stopped.
摘要翻译：一种用于在录像带记录器中从磁带再现静噪图像而没有噪声条的方法和装置。磁带在旋转磁头的旋转相位检测信号的前沿或在静止再现命令信号后产生的再现控制信号的前沿处于停止状态，并且检测到鼻杆是否存在于垂直消隐期间内处于静止再现状态。如果噪声条存在于垂直消隐期内，则继续再现状态。在垂直消隐期间不存在噪声条的情况下，磁带以低速运行，当噪声条进入垂直消隐期间时，磁带的馈送停止。

54. 发明公开

EP0097825A2 Transistor amplifier with constant current source 失效
标题翻译：晶体管放大器，恒流源。
公开(公告)号：EP0097825A2
公开(公告)日：1984-01-11
申请号：EP83105329.3
申请日：1983-05-30
申请人： HITACHI, LTD.
发明人： Fukushima, Isao , Kobori, Yasunori , Nishijima, Hideo
IPC分类号： H03F3/45 , H03F3/345
CPC分类号： H03F3/45085 , H03F3/345
摘要： A transistor circuit is used as a signal amplifier which has almost no possibility of oscillation in an IC. The transistor circuit includes a cascade connection of differential amplifiers. Each of the amplifiers comprises a differential pair of bipolar transistors and an enhancement-type MOSFET as a constant current source. The MOSFET of each amplifier is connected in the common source mode, and the drain is connected to the emitters of the differential pair of bipolar transistors. The sources of all the MOSFETS are connected to a common ground-line.

55. 发明授权

EP0144910B1 Apparatus for multiplex recording and reproduction of audio and video signals 有权
标题翻译：多媒体记录和复制音频和视频信号的设备
公开(公告)号：EP0144910B1
公开(公告)日：1991-01-30
申请号：EP84114434.8
申请日：1984-11-29
申请人： HITACHI, LTD.
发明人： Miura, Kuniaki , Okada, Yoshinori , Fukushima, Isao , Ohtsuka, Susumu
IPC分类号： H04N9/82
CPC分类号： H04N9/802 , H04N9/8355

56. 发明公开

EP0177931A3 Motor driving circuit 有权
标题翻译：电机驱动电路
公开(公告)号：EP0177931A3
公开(公告)日：1987-07-29
申请号：EP85112727
申请日：1985-10-08
申请人： HITACHI, LTD.
发明人： Nishijima, Hideo , Ito, Takayasu , Fukushima, Isao
IPC分类号： H02P06/02
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 (3) and a large-current NPN transistor (4), and a switching regulator (2) of a step-down and variable type is provided between the collector of the NPN transistor (4) and the emitter of the PNP transistor (3). 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（3）和大电流NPN晶体管（4）的达林顿连接构成的等效功率PNP晶体管以及降压和可变的开关调节器（2）在NPN晶体管（4）的集电极和PNP晶体管（3）的发射极之间提供一种类型。可以减少电机驱动电路中的电力损失，并且可以节省操作电机驱动电路所需的电力。

57. 发明公开

EP0144910A3 Apparatus for multiplex recording and reproduction of audio and video signals 有权
标题翻译：多媒体记录和复制音频和视频信号的设备
公开(公告)号：EP0144910A3
公开(公告)日：1987-07-22
申请号：EP84114434
申请日：1984-11-29
申请人： HITACHI, LTD.
发明人： Miura, Kuniaki , Okada, Yoshinori , Fukushima, Isao , Ohtsuka, Susumu
IPC分类号： H04N09/82
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.

58. 发明公开

EP0180174A3 Auto-tracking apparatus of a magnetic recording/reproducing apparatus 有权
标题翻译：磁记录/再现装置的自动跟踪装置
公开(公告)号：EP0180174A3
公开(公告)日：1987-04-15
申请号：EP85113667
申请日：1985-10-28
申请人： HITACHI, LTD.
发明人： Okamoto, Kaneyuki , Nishijima, Hideo , Fukushima, Isao
IPC分类号： G11B15/467 , G11B05/008
CPC分类号： G11B5/00878 , G11B15/087 , G11B15/4675
摘要： An auto-tracking apparatus of a magnetic recording/reproducing apparatus has a circuit for discriminating whether the audio signals recorded on a magnetic tape to be reproduced were recorded by audio rotary heads or a fixed head, and a circuit for selecting outputs of the audio rotary heads in the case of the Hi-Fi recorded magnetic tape by the audio rotary heads and outputs of the video rotary heads in the case where it is determined that the magnetic tape is the normal recorded tape by the fixed head on the basis of the result of the discrimination, and performs the auto-tracking on the basis of the selected outputs. With this arrangement, the auto-tracking can be carried out irrespective of whether the magnetic tape is the normal recorded tape by the conventional fixed head or the Hi-Fi recorded tape by the rotary heads.

59. 发明公开

EP0180174A2 Auto-tracking apparatus of a magnetic recording/reproducing apparatus 有权
标题翻译：一种磁记录/再现装置的跟踪装置。
公开(公告)号：EP0180174A2
公开(公告)日：1986-05-07
申请号：EP85113667.1
申请日：1985-10-28
申请人： HITACHI, LTD.
发明人： Okamoto, Kaneyuki , Nishijima, Hideo , Fukushima, Isao
IPC分类号： G11B15/467
CPC分类号： G11B5/00878 , G11B15/087 , G11B15/4675
摘要： An auto-tracking apparatus of a magnetic recording/reproducing apparatus has a circuit for discriminating whether the audio signals recorded on a magnetic tape to be reproduced were recorded by audio rotary heads or a fixed head, and a circuit for selecting outputs of the audio rotary heads in the case of the Hi-Fi recorded magnetic tape by the audio rotary heads and outputs of the video rotary heads in the case where it is determined that the magnetic tape is the normal recorded tape by the fixed head on the basis of the result of the discrimination, and performs the auto-tracking on the basis of the selected outputs. With this arrangement, the auto-tracking can be carried out irrespective of whether the magnetic tape is the normal recorded tape by the conventional fixed head or the Hi-Fi recorded tape by the rotary heads.

60. 发明公开

EP0176888A1 Video signal emphasis circuit 失效
标题翻译：电路强调的视频信号。
公开(公告)号：EP0176888A1
公开(公告)日：1986-04-09
申请号：EP85111931.3
申请日：1985-09-20
申请人： HITACHI, LTD.
发明人： Miura, Kuniaki , Yunde, Yasufumi , Kotani, Kazunori , Fukushima, Isao , Kano, Kenji
IPC分类号： H04N5/78 , H04N5/21
CPC分类号： H04N5/142 , H04N5/923 , H04N9/646
摘要： Disclosed is a circuit for emphasizing a video signal (e,) 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 (e1) by one horizontal scanning period (1H) is positively fed back through a feedback circuit (2, 3) to the input of the input video signal. An amplitude difference signal (e 4 ) between the video signal (e 2 ) after being fed back through a positive feedback loop and the delayed video signal (e 3 ) is produced and added (7) to the input video signal (e,) to provide an output video signal (e o ).

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