专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

EP0158231B1 Filter integrated circuit 失效
标题翻译：滤波器集成电路
公开(公告)号：EP0158231B1
公开(公告)日：1991-04-17
申请号：EP85103719.2
申请日：1985-03-28
申请人： HITACHI, LTD.
发明人： Orada, Yoshinori , Fukushima, Isao , Miura, Kuniaki , Kano, Kenji
IPC分类号： H03H11/04
CPC分类号： H03H11/1291

2. 发明公开

EP0217152A3 Video tape recorder with magnetic head arrangement for recording/reproducing to two different formats 失效
标题翻译：具有用于记录/再现两种不同格式的磁头安装的视频磁带记录器
公开(公告)号：EP0217152A3
公开(公告)日：1988-11-17
申请号：EP86112070
申请日：1986-09-01
申请人： HITACHI, LTD.
发明人： Yoshioka, Atsushi , Miura, Kuniaki , Kotani, Kazunori , Masuda, Michio , Yumde, Yasufumi , Arai, Takao
IPC分类号： H04N09/80
CPC分类号： H04N9/7921 , H04N9/825 , H04N9/8355
摘要： Disclosed is a VTR of the helical scan type having a plurality of rotary magnetic heads (38 to 43). This VTR can select one of a first and a second signal recording forms which are different from each other, and record signals on a magnetic tape (44, 60). In the first recording form, a frequency-modulated video signal including a luminance signal and a color signal and a frequency-modulated sound signal are recorded on the same track so as to be superimposed one on the other. In the second signal recording form, a frequency-modulated luminance signal and a frequency-modulated color signal are recorded separately on tracks adjacent to each other. This VTR has compatibility with respect to the record- ingireproducing of two different signals.

3. 发明公开

EP0217152A2 Video tape recorder with magnetic head arrangement for recording/reproducing to two different formats 失效
标题翻译：磁带录像机用的磁头组件，用于记录/再现用于两种不同的格式。
公开(公告)号：EP0217152A2
公开(公告)日：1987-04-08
申请号：EP86112070.7
申请日：1986-09-01
申请人： HITACHI, LTD.
发明人： Yoshioka, Atsushi , Miura, Kuniaki , Kotani, Kazunori , Masuda, Michio , Yumde, Yasufumi , Arai, Takao
IPC分类号： H04N9/80
CPC分类号： H04N9/7921 , H04N9/825 , H04N9/8355
摘要： Disclosed is a VTR of the helical scan type having a plurality of rotary magnetic heads (38 to 43). This VTR can select one of a first and a second signal recording forms which are different from each other, and record signals on a magnetic tape (44, 60). In the first recording form, a frequency-modulated video signal including a luminance signal and a color signal and a frequency-modulated sound signal are recorded on the same track so as to be superimposed one on the other. In the second signal recording form, a frequency-modulated luminance signal and a frequency-modulated color signal are recorded separately on tracks adjacent to each other. This VTR has compatibility with respect to the record- ingireproducing of two different signals.

4. 发明授权

EP0167971B1 Magnetic recording apparatus 失效
标题翻译：磁记录装置
公开(公告)号：EP0167971B1
公开(公告)日：1992-03-04
申请号：EP85108195.0
申请日：1985-07-02
申请人： HITACHI, LTD.
发明人： Kuwahara, Kazuyoshi c/o Hitachi Ltd. , Fukushima, Isao , Miura, Kuniaki , Kano, Kenji
IPC分类号： G11B5/03 , H04N5/782 , H04N9/79
CPC分类号： G11B5/03

5. 发明公开

EP0122632A3 FM signal demodulation circuit 失效
标题翻译： FM信号解调电路
公开(公告)号：EP0122632A3
公开(公告)日：1989-02-22
申请号：EP84104334.2
申请日：1984-04-17
申请人： HITACHI, LTD.
发明人： Miura, Kuniaki , Kobori, Yasunori , Fukushima, Isao , Shiomi, Makoto , Kano, Kenji
IPC分类号： H03D3/04
CPC分类号： H03D3/00 , H03D3/04 , H03D2200/0084
摘要： An FM signal demodulation circuit comprises a plurality of inverters (12, 13, 14, 15; 26) and a capacitor (17; 24, 25). Each of the inverters is constituted by an integrated injection logic I²L including a transistor (12a, 13a, 14a, 15a; 26a) and an injector current source (12i, 13i, 14i, 15i).

6. 发明公开

EP0204088A2 Integrated circuit with a phase-locked loop 失效
标题翻译：集成电路与锁相环。
公开(公告)号：EP0204088A2
公开(公告)日：1986-12-10
申请号：EP86103624.2
申请日：1986-03-18
申请人： HITACHI, LTD. , Hitachi Video Engineering Co., Ltd.
发明人： Shiomi, Makoto , Miura, Kuniaki , Fukushima, Isao , Moro, Eiji , Kanenari, Shigeaki
IPC分类号： H03L7/08
CPC分类号： H03L7/0805 , H03L7/06
摘要： The IC chip consists of the electronic circuits wherein the voltage control oscillator whose oscillation frequency is dependent on the product of the resistance value of the resister element and the electrostatic capacity of the 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 the second resister element and the 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 resister element and the electrostatic capacity of the capacitor element in said electronic circuit are absorbed automatically.

7. 发明公开

EP0137462A3 Integrated filter circuit 失效
标题翻译：集成滤波电路
公开(公告)号：EP0137462A3
公开(公告)日：1986-10-08
申请号：EP84111944
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 , H03J07/02 , H03J05/24
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).

8. 发明公开

EP0167971A2 Magnetic recording apparatus 失效
标题翻译：一种磁性记录装置。
公开(公告)号：EP0167971A2
公开(公告)日：1986-01-15
申请号：EP85108195.0
申请日：1985-07-02
申请人： HITACHI, LTD.
发明人： Kuwahara, Kazuyoshi c/o Hitachi Ltd. , Fukushima, Isao , Miura, Kuniaki , Kano, Kenji
IPC分类号： G11B5/03 , H04N5/782 , H04N9/79
CPC分类号： G11B5/03
摘要： In a magnetic recording circuit with a bias current circuit adapted to superimpose a bias current from a bias oscillator (22) on a recording signal and to supply a resultant signal to a magnetic head (4), there are provided a resistor (5) for detecting the bias current flowing through the magnetic head, a rectifier circuit (24) for rectifying and smoothing a signal developing across the resistor, and a control circuit (25) for comparing the output voltage of the rectifier circuit with a reference voltage (V ref ) and producing an output signal which controls the oscillation level of the bias oscillator, whereby the bias current flowing through the magnetic head can automatically be set to a predetermined level. A variable resistor (3) for adjustment of the bias current and adjustment step for the variable resistor can be dispensed with.

9. 发明公开

EP0158231A2 Filter integrated circuit 失效
标题翻译： Integrierter过滤器
公开(公告)号：EP0158231A2
公开(公告)日：1985-10-16
申请号：EP85103719.2
申请日：1985-03-28
申请人： HITACHI, LTD.
发明人： Orada, Yoshinori , Fukushima, Isao , Miura, Kuniaki , Kano, Kenji
IPC分类号： H03H11/04
CPC分类号： H03H11/1291
摘要： A filter integrated circuit (1) having a reference level generator circuit (4) for attenuating its input signal and generating a reference level signal, a pseudofilter circuit (5) including resistors (17, 18) and a variable capacitor (19) as filter elements, and an error amplifier unit (6, 7, 8) for comparing the level of the output signal of the reference level generator circuit with the level of the output signal of the pseudofilter circuit and for generating an automatic adjustment control signal (9) in accordance with the level difference between the output signals. The automatic adjust- . ment control signal is supplied to the pseudofilter circuit to change the capacitance value of the variable capacitor in the pseudofilter circuit so that the output signal level of the pseudofilter circuit may become equal to the level of the reference signal. The automatic adjustment control signal is also supplied to at least one filter circuit (11, 12) to change the capacitance of a variable capacitor (32, 33) included therein. As a result, the deviation in the filter characteristics caused by deviations in the resistance of a resistor (30, 31) and in the capacitance of the capacitor is corrected.
摘要翻译：一种滤波器集成电路，具有用于衰减其输入信号并产生参考电平信号的参考电平发生器电路，包括电阻器和可变电容器的滤波器电路作为滤波器元件，以及误差放大器单元，用于将输出信号的电平参考电平发生器电路，其具有伪滤波器电路的输出信号的电平，并且用于根据输出信号之间的电平差产生自动调节控制信号。自动调节控制信号被提供给假模糊电路，以改变伪滤波器电路中的可变电容器的电容值，使得伪滤波电路的输出信号电平可能变得等于参考信号的电平。自动调整控制信号也被提供给至少一个滤波器电路以改变其中包括的可变电容器的电容。结果，校正了由电阻器的电阻的偏差和电容器的电容引起的滤波器特性的偏差。

10. 发明授权

EP0509563B1 Magnetic recording and reproducing apparatus 失效
公开(公告)号：EP0509563B1
公开(公告)日：1997-01-29
申请号：EP92112073.9
申请日：1987-10-28
申请人： HITACHI, LTD.
发明人： Yamanushi, Fumihiko , Yoshioka, Atsushi Kashiwadai Kurarute 1122 , Watanabe, Katsuyuki , Masuda, Michio , Miura, Kuniaki
IPC分类号： H04N9/83 , H04N9/79 , G11B15/07 , G11B23/087
CPC分类号： H04N9/83 , H04N9/833

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式