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1. 发明授权

US3927420A Frequency dependent compensating circuit for magnetic recording signals 失效
标题翻译：用于磁记录信号的频率相关补偿电路
公开(公告)号：US3927420A
公开(公告)日：1975-12-16
申请号：US41215373
申请日：1973-11-02
申请人： HITACHI LTD
发明人： HAYASHI KENJI , YUMDE YASUFUMI , KAWAMURA KOTARO
IPC分类号： G11B5/035 , G11B5/00 , G11B5/09 , H03G5/22 , G11B5/45 , H03F3/45
CPC分类号： H03G5/22 , G11B5/00
摘要： A magnetic recording and/or reproducing apparatus for audio signals whose frequency to phase characteristic is linear and which comprises a correcting circuit to increase the gain in the high frequency components thereby compensating for the loss of the high frequency components of the reproduced signal which otherwise may occur. The correcting circuit comprises at least one delay circuit, means for obtaining a signal with a predetermined time delay Tau and a 2 Tau delay signal, means for adding a no delay signal to the 2 Tau delay signal, and means for subtracting the added signal from the Tau delay signal.
摘要翻译：用于其频相特性为线性的音频信号的磁记录和/或再现装置，其包括用于增加高频分量中的增益的校正电路，从而补偿再生信号的高频分量的损失，否则可能发生。校正电路包括至少一个延迟电路，用于获得具有预定时间延迟τ和2τ延迟信号的信号的装置，用于将2延迟信号加到2 tau延迟信号的装置，以及用于从 τ延迟信号。

2. 发明专利

DE2949979A1 未知
公开(公告)号：DE2949979A1
公开(公告)日：1980-08-07
申请号：DE2949979
申请日：1979-12-12
申请人： HITACHI LTD
发明人： FUJITA MASAHIKO , HAYASHI KENJI , KONNO KAZUTOSHI
IPC分类号： G11B15/32 , G11B15/50 , H02K29/08 , G11B15/26 , G03B1/00
摘要： A tape drive device in which a cavity is formed in a reel hub provided for supplying or taking up a tape-shaped information recording and reproducing medium such as a magnetic tape or a film. A motor including a rotor unit and a stator unit is partly or wholly received within the cavity of the reel hub, and the rotating force generated by the rotor part of the motor is transmitted directly or through a reduction gearing to the reel hub to cause rotation of the reel hub.

3. 发明专利

DE3231248A1 未知
公开(公告)号：DE3231248A1
公开(公告)日：1983-03-10
申请号：DE3231248
申请日：1982-08-23
申请人： HITACHI LTD
发明人： SAITO TADASHI , HIGUCHI SHIGEMITSU , KONNO KAZUTOSHI , SAMPEI TOHRU , HAYASHI KENJI , NORO YOSHIHIKO , WAKABAYASHI MANABU
IPC分类号： G11B21/10 , G11B5/55 , G11B5/596 , G11B5/016 , G11B5/25 , G11B5/27 , G11B21/06 , G11B23/18 , H04N5/781

4. 发明专利

DE2355180A1 未知
公开(公告)号：DE2355180A1
公开(公告)日：1974-05-16
申请号：DE2355180
申请日：1973-11-05
申请人： HITACHI LTD
发明人： HAYASHI KENJI , YUMDE YASUFUMI , KAWAMURA KOTARO
IPC分类号： G11B5/035 , G11B5/00 , G11B5/09 , H03G5/22 , G11B5/44
摘要： A magnetic recording and/or reproducing apparatus for audio signals whose frequency to phase characteristic is linear and which comprises a correcting circuit to increase the gain in the high frequency components thereby compensating for the loss of the high frequency components of the reproduced signal which otherwise may occur. The correcting circuit comprises at least one delay circuit, means for obtaining a signal with a predetermined time delay tau and a 2 tau delay signal, means for adding a no delay signal to the 2 tau delay signal, and means for subtracting the added signal from the tau delay signal.

5. 发明专利

JP2004363926A Multiband transmitter-receiver and wireless communication device using same 有权
公开(公告)号：JP2004363926A
公开(公告)日：2004-12-24
申请号：JP2003159744
申请日：2003-06-04
申请人： Hitachi Ltd , Hitachi Media Electoronics Co Ltd , Hitachi Metals Ltd , 日立金属株式会社 , 株式会社日立メディアエレクトロニクス , 株式会社日立製作所
发明人： WADA TOSHIYUKI , FUKAMACHI KEISUKE , HAYASHI KENJI , SHIBA TAKASHI , HOSAKA NORIO , KATAGISHI MAKOTO
IPC分类号： H01P1/15 , H03H9/17 , H03H9/54 , H03H9/70 , H03H9/72 , H04B1/3822 , H04B1/50
CPC分类号： H04B1/0057 , H04B1/005 , H04B1/406 , H04B1/52
摘要： PROBLEM TO BE SOLVED: To provide a multiband transmitter-receiver which prevents thermal characteristic deterioration, is small in size, is low in cost and has high reliability. SOLUTION: The multiband transmitter-receiver having a function of sharing transmit and receive signals of a plurality of frequency bands by the same antenna has a plurality of filters, corresponding to the plurality of frequency bands, and a plurality of amplifiers, amplifying transmit signals, mounted on the same substrate; and the plurality of filters are arranged closely to the amplifiers in the decreasing order of temperature characteristics and another amplifier is arranged between the filter arranged most closely to the amplifier and the amplifier operating in the frequency band corresponding to the filter. COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP2553761B2 失效
公开(公告)号：JP2553761B2
公开(公告)日：1996-11-13
申请号：JP31268990
申请日：1990-11-20
申请人： HITACHI LTD
发明人： EBINA OSAMU , HAYASHI KENJI , NODA SHINYA
IPC分类号： G06F3/14 , G06F3/048 , G06F13/00 , G06F15/00 , G06F17/21

7. 发明专利

JPH01236839A SECRECY PROTECTING SYSTEM 失效
公开(公告)号：JPH01236839A
公开(公告)日：1989-09-21
申请号：JP6454288
申请日：1988-03-17
申请人： HITACHI LTD
发明人： EBINA OSAMU , HAYASHI KENJI
IPC分类号： H04K1/02
摘要： PURPOSE:To attain the sufficient secrecy protection by synthesizing the information prepared individually with a transmitting side sub-system with the communication contents of a user and encoding them. CONSTITUTION:A user executes all the input of a user communication sentence, the generation of information for synthesizing to change an encoding output, the synthesizing of the communication sentence and a ciphering processing, by a reliable, for example, IC card. Here, after the cipher text is decoded by a fair receiving side 106, in order to remove information for synchronization added by a transmitting side 109, it is necessary to determine the type of the information for synthesizing added and the system added between the transmitting side and the receiving side. As the determination, the method to add to a communication sentence as a function of the data and the method to arrange the communication sentence to a position specified by a random number as picture information in one picture and reproduce with a picture recognizing means on the receiving side 106 are adopted. Thus, the output of a sub-system does not become constant even to a fixed form communication sentence, and a sufficient secrecy can be protected even when the input is inputted to a non- reliable sub-system 108.

8. 发明专利

JPH01212041A CRYPTOGRAPHIC COMMUNICATION SYSTEM 失效
公开(公告)号：JPH01212041A
公开(公告)日：1989-08-25
申请号：JP3671788
申请日：1988-02-18
申请人： HITACHI LTD
发明人： HAYASHI KENJI , EBINA OSAMU
IPC分类号： H04L9/14 , G06F12/14 , G06F21/20 , G06F21/24 , H04L9/06 , H04L9/16
摘要： PURPOSE:To enhance the safety of the system by using time series information in common to the system so as to revise ciphering and deciphering algorithm at the transmission side and the reception side thereby applying cryptographic communication. CONSTITUTION:In case of the transmission by the system, a selection command means uses time series information in common from a time series information generating means to select and command a ciphering algorithm and a cryptographic key used by a ciphering processing means. In case of the reception by the system, the selection command means uses time series information in common from the time series information generating means to select and command a decoding algorithm and a decoding key used by a deciphering processing means. Since the ciphering processing and the deciphering processing are applied by using the conversion algorithm revised in response to the time of communication and the key revised in response to time, then the safety is enhanced.

9. 发明专利

JPH01107824A METHOD AND APPARATUS REGENERATING ADSORBENT 失效
公开(公告)号：JPH01107824A
公开(公告)日：1989-04-25
申请号：JP26388987
申请日：1987-10-21
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , KAJIWARA HIROTAKE , HAYASHI KENJI
IPC分类号： B01D53/04 , F25J1/00
摘要： PURPOSE:To complete the regeneration of adsorbent in a short time by bringing the absorbent into direct contact with heating medium gas such as N2, desorbing the absorbed impurities, and cooling the adsorbent directly with the purified gas such as He after the heating medium gas is removed from the adsorbent. CONSTITUTION:At first, a relief valve 3 is opened to reduce the pressure of an adsorption tube 1 to the atmospheric pressure, and N2 is introduced from a conduit 9 to be heated by a heater 8 and is flowed through the adsorption tube 1 to directly heat the absorbent to desorb the impurities. When the adsorbent is heated to 200 deg.C, valves 3, 10 are closed and a valve 4 is opened and the adsorption tube 1 is evacuated by a vacuum pump 7 to remove N2. Then, valves 6, 11 are opened and a part of purified gas is flowed to the adsorption tube 1 to directly cool the adsorbent, At that time, high pressure refrigerant gas of normal temp. compressed by a compressor 20 is passed through an absorption tube 1' to adsorb and remove the impurity gas, and is supplied to He- refrigerator 21, and the gas to be returned is returned to the compressor 20 to be circulated.

10. 发明专利

JPS6373061A CRYOGENIC REFRIGERATOR 失效
公开(公告)号：JPS6373061A
公开(公告)日：1988-04-02
申请号：JP21716886
申请日：1986-09-17
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , HAYASHI KENJI
IPC分类号： F25B9/02

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