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1. 发明公开

EP0091672A2 Characteristic switching circuit 失效
标题翻译： Netzwerkes的Schaltung zur Wahl des Frequenzganges。
公开(公告)号：EP0091672A2
公开(公告)日：1983-10-19
申请号：EP83103438.4
申请日：1983-04-08
申请人： Hitachi, Ltd. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Fukushima, Isao , Kuwahara, Kazuyoshi , Itoigawa, Keiichi , Kobori, Yasunori , Nishijima, Hideo
IPC分类号： H03H11/04 , H03H19/00
CPC分类号： H03H19/004
摘要： A time constant circuit capable of switching the characteristic, which is realized by a combination of an equivalent resistor made up of a switched capacitor and an ordinary capacitor, comprises a capacitor (20, 26, 27) of the switched capacitor or the time constant circuit connected in parallel to a series circuit including a switching device (29, 51, 69) and an additional capacitor (28, 47, 52, 56, 58). The characteristic is switched by turning on and off the additional capacitor by the switching device. The direct connection of a plurality of equivalent resistors with a plurality of switched capacitors and ordinary capacitors makes up an equalizer. The capacitor making up a switched capacitor is connected with a switching device and an additional capacitor so that the frequency characteristic of the equalizer is switchable by turning on and off the switching device. Each of the capacitors making up the switched capacitors, the capacitors making up the time constant circuits and the additional capacitors has an end thereof grounded without fail. All the elements are thus capable of being formed in the same integrated circuits.
摘要翻译：能够切换通过由开关电容器和普通电容器构成的等效电阻的组合实现的特性的时间常数电路包括开关电容器的电容器或与串联电路并联连接的时间常数电路包括开关器件和附加电容器。通过开关装置接通和关闭附加电容器来切换特性。多个等效电阻器与多个开关电容器和普通电容器的直接连接构成均衡器。构成开关电容器的电容器与开关器件和附加电容器连接，使得均衡器的频率特性可通过接通和断开开关器件来切换。构成开关电容器的每个电容器，构成时间常数电路的电容器和附加电容器的端部接地。因此，所有元件能够形成在相同的集成电路中。

2. 发明公开

EP0090423A2 Motor driving circuit 失效
标题翻译：电动机驱动电路。
公开(公告)号：EP0090423A2
公开(公告)日：1983-10-05
申请号：EP83103177.8
申请日：1983-03-30
申请人： Hitachi, Ltd. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Nishijima, Hideo , Sera, Katsumi , Fukushima, Isao , Kobori, Yasunori
IPC分类号： H02P3/12 , H02P3/22
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 (4) of a video tape recorder (VTR) capstan motor are shorted by a group of switching elements (12-17) when a control input voltage generated from a rotation detec- tion/oscillator (6) is in a predetermined range.

3. 发明授权

EP0193030B1 Still picture reproducing system for magnetic recording and reproducing apparatus 失效
标题翻译：用于磁记录和再现装置的静止图像再现系统
公开(公告)号：EP0193030B1
公开(公告)日：1989-07-05
申请号：EP86101807.5
申请日：1986-02-13
申请人： HITACHI, LTD. , HITACHI MICROCOMPUTER ENGINEERING LTD. , Hitachi Video Engineering Co., Ltd.
发明人： Sekiya, Masataka , Nishijima, Hideo , Okamoto, Kaneyuki , Fukushima, Isao , Fujii, Fumiaki , Sera, Katsumi , Furutani, Takashi
IPC分类号： G11B15/18 , H04N5/783
CPC分类号： H04N5/783 , G11B15/1875

4. 发明授权

EP0092258B1 Frequency-voltage converter 失效
标题翻译：频率转换器
公开(公告)号：EP0092258B1
公开(公告)日：1987-08-26
申请号：EP83103921.9
申请日：1983-04-21
申请人： HITACHI, LTD. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Kobori, Yasunori , Fukushima, Isao , Nishijima, Hideo , Masuda, Yoshinori , Yamamoto, Norihisa
IPC分类号： H03K9/06
CPC分类号： G11B15/46 , H03K9/06

5. 发明授权

EP0065219B1 Signal voltage dividing circuit 失效
标题翻译：信号电压分频电路
公开(公告)号：EP0065219B1
公开(公告)日：1987-08-26
申请号：EP82103894.0
申请日：1982-05-05
申请人： Hitachi, Ltd. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Fukushima, Isao , Kuwahara, Kazuyoshi , Nishijima, Hideo , Kobori, Yasunori , Itoigawa, Keiichi
IPC分类号： H03H19/00
CPC分类号： H03H19/004

6. 发明公开

EP0169479A3 Auto-tracking method and apparatus of a magnetic recording/reproducing apparatus 有权
标题翻译：自动跟踪方法和磁记录/再现装置的设备
公开(公告)号：EP0169479A3
公开(公告)日：1987-08-19
申请号：EP85108881
申请日：1985-07-16
申请人： HITACHI, LTD. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Kobori, Yasunori , Nishijima, Hideo , Okamoto, Kaneyuki , Fukushima, Isao , Goto, Katsuhiko , Takahashi, Takashi
IPC分类号： G11B15/467
CPC分类号： G11B15/4676
摘要： An auto-tracking method and apparatus of a magnetic recording/reproducing appartus are disclosed. The apparatus comprises: a reference signal generator (9) for generating a reference signal (REF); a rotary cylinder driver (3, 5) for rotating, synchronously with the reference signal, a rotary cylinder to which magnetic heads are attched; a head switching signal generator (16, 17) for detecting a rotational phase of the rotary cyliner and outputting a head switching signal (HS) representative of this detected rotational phase; a reproduction signal envelope level detection circuit (13, 14) for sampling and detecting the envelope levels of the reproduced signals derived by the magnetic heads at timings corresponding to the head switching signal; a tape running apparatus (2, 6) for driving a magnetic tape at a phase difference designated with respect to the rotational phase of the magnetic heads; a reference signal delay circuit (10, 11) for generating a delay reference signal (DREF) to control the tape running apparatus on the basis of the reference signal, in which the delay reference signal is derived by delaying the reference signal by an arbitrary time; and means for conrolling the reference signal delay circuit (12) on the basis of the head switching signal and the detected envelope levels of the reproduced signals in a manner that the reference signal delay circuit first changes the run of the magnetic tape at a rough step within a tracking phase range of 2 1 r and thereby detecting the roughly searched maximum envelope level of the reproduced signals, and then changes the run of the magnetic tape at a fine step within a tracking phase range which is narrower than 2π and which includes the running phase of the magnetic tape corresponding to the roughly searched maximum envelope level and thereby detecting the finely searched maximum envelope level, and thereby allowing the magnetic tape to run at the phase corresponding to the finely searched maximum envelope level. With this apparatus, the best tracking state can be accurately and certainly obtained in a short time.

7. 发明公开

EP0193030A1 Still picture reproducing system for magnetic recording and reproducing apparatus 失效
标题翻译： Aufzeichnungs- undWiedergabegerät的自动化系统。
公开(公告)号：EP0193030A1
公开(公告)日：1986-09-03
申请号：EP86101807.5
申请日：1986-02-13
申请人： HITACHI, LTD. , HITACHI MICROCOMPUTER ENGINEERING LTD. , Hitachi Video Engineering Co., Ltd.
发明人： Sekiya, Masataka , Nishijima, Hideo , Okamoto, Kaneyuki , Fukushima, Isao , Fujii, Fumiaki , Sera, Katsumi , Furutani, Takashi
IPC分类号： G11B15/18 , H04N5/783
CPC分类号： H04N5/783 , G11B15/1875
摘要： The system sends one frame in order to shift a reproduction mode from ordinary reproduction to reproduction of a still picture by use of so-called "fine slow", sends one more frame if a noise is detected on a picture at this time, and stops if no noise is detected.
摘要翻译：系统发送一帧以便通过使用所谓的“精细慢”将再现模式从正常再现移动到静止图像的再现，如果此时在图像上检测到噪声，则再发送一帧，并停止如果没有检测到噪声。

8. 发明公开

EP0091672A3 Characteristic switching circuit 失效
标题翻译：特性切换电路
公开(公告)号：EP0091672A3
公开(公告)日：1985-06-12
申请号：EP83103438
申请日：1983-04-08
申请人： Hitachi, Ltd. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Fukushima, Isao , Kuwahara, Kazuyoshi , Itoigawa, Keiichi , Kobori, Yasunori , Nishijima, Hideo
IPC分类号： H03H11/04 , H03H19/00
CPC分类号： H03H19/004
摘要： A time constant circuit capable of switching the characteristic, which is realized by a combination of an equivalent resistor made up of a switched capacitor and an ordinary capacitor, comprises a capacitor (20, 26, 27) of the switched capacitor or the time constant circuit connected in parallel to a series circuit including a switching device (29, 51, 69) and an additional capacitor (28, 47, 52, 56, 58). The characteristic is switched by turning on and off the additional capacitor by the switching device. The direct connection of a plurality of equivalent resistors with a plurality of switched capacitors and ordinary capacitors makes up an equalizer. The capacitor making up a switched capacitor is connected with a switching device and an additional capacitor so that the frequency characteristic of the equalizer is switchable by turning on and off the switching device. Each of the capacitors making up the switched capacitors, the capacitors making up the time constant circuits and the additional capacitors has an end thereof grounded without fail. All the elements are thus capable of being formed in the same integrated circuits.
摘要翻译：能够切换通过由开关电容器和普通电容器构成的等效电阻的组合实现的特性的时间常数电路包括开关电容器的电容器或与串联电路并联连接的时间常数电路包括开关器件和附加电容器。通过开关装置接通和关闭附加电容器来切换特性。多个等效电阻器与多个开关电容器和普通电容器的直接连接构成均衡器。构成开关电容器的电容器与开关器件和附加电容器连接，使得均衡器的频率特性可通过接通和断开开关器件来切换。构成开关电容器的每个电容器，构成时间常数电路的电容器和附加电容器的端部接地。因此，所有元件能够形成在相同的集成电路中。

9. 发明授权

EP0169479B1 Auto-tracking method and apparatus of a magnetic recording/reproducing apparatus 有权
标题翻译：自动跟踪方法和磁记录/再现装置的设备
公开(公告)号：EP0169479B1
公开(公告)日：1989-06-21
申请号：EP85108881.5
申请日：1985-07-16
申请人： HITACHI, LTD. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Kobori, Yasunori , Nishijima, Hideo , Okamoto, Kaneyuki , Fukushima, Isao , Goto, Katsuhiko , Takahashi, Takashi
IPC分类号： G11B15/467
CPC分类号： G11B15/4676

10. 发明公开

EP0170097A1 Apparatus for magnetic recording and reproducing video and sound signals 失效
标题翻译：设备，用于磁记录和视频和音频信号的重放。
公开(公告)号：EP0170097A1
公开(公告)日：1986-02-05
申请号：EP85108302.2
申请日：1985-07-04
申请人： HITACHI, LTD. , HITACHI MICROCOMPUTER ENGINEERING LTD.
发明人： Okada, Yoshinori , Watanabe, Hisaji , Fukushima, Isao , Yoshida, Hideo
IPC分类号： H04N9/82 , G11B20/06
CPC分类号： H04N9/8355
摘要： A VTR is furnished with a phase-locked loop (38,40,41,42,51) whose reference input is a color signal subcarrier. The phase-locked loop fixes two sound FM carrier frequencies in constant relationships with the frequency of the color signal subcarrier, thereby to stabilize the carrier frequencies. The two sound FM carrier frequencies are respectively selected to be integral times of (where f H denotes the frequency of the horizontal synchronizing signal). The frequencies of the beats between both sound carriers are fixed to integral times of , with the result that degradation of the reproduced picture attributed to the beats is prevented.

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