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63. 发明专利

JPH0775333B2 失效
公开(公告)号：JPH0775333B2
公开(公告)日：1995-08-09
申请号：JP12316784
申请日：1984-06-15
IPC分类号： H04B3/04 , H04B3/10 , H04L25/03 , H04L25/12

64. 发明专利

JPH0740676B2 失效
公开(公告)号：JPH0740676B2
公开(公告)日：1995-05-01
申请号：JP4958483
申请日：1983-03-24
IPC分类号： G11B20/10 , H04B3/04 , H04L25/03 , H04L25/12

65. 发明专利

JPH03171815A BUS DRIVER CIRCUIT 失效
公开(公告)号：JPH03171815A
公开(公告)日：1991-07-25
申请号：JP22456790
申请日：1990-08-28
申请人： IBM
发明人： RONARUDO DEII BAAKU , KAARU YAKOBU MATSUTSU
IPC分类号： H03K19/0175 , H04L25/02 , H04L25/12
摘要： PURPOSE: To stop a higher voltage waveform and eliminate the need to settle a bus-setting time and a bus-rising time by increasing an output conductance of a driver, when a higher voltage than a desired voltage is detected by an output part. CONSTITUTION: A bus driver equipped with an internal positive voltage clamp is provided so that a large positive voltage wave is sent out to a bus. For example, a collector of a driver output transistor is clamped to the base, by using diode stacks D1 and D2 to clamp positive voltage reflection to a constant voltage and to prevent an excessive ringing from being generated on the bus. Consequently, the need to settle the bus setting time and bus rise time is eliminated.

66. 实用新型

JPH0129877Y2 失效
公开(公告)号：JPH0129877Y2
公开(公告)日：1989-09-12
申请号：JP2991183
申请日：1983-03-03
IPC分类号： H04L1/00 , H03K5/19 , H04B3/06 , H04B3/10 , H04L25/03 , H04L25/12

67. 发明专利

JPH0139255B2 失效
公开(公告)号：JPH0139255B2
公开(公告)日：1989-08-18
申请号：JP4647681
申请日：1981-03-31
申请人： HITACHI LTD
发明人： SATO TAKAO , ITO TETSUO
IPC分类号： H04B10/572 , H03M5/04 , H04B3/06 , H04B3/10 , H04B10/00 , H04B10/07 , H04B10/25 , H04B10/293 , H04B10/556 , H04B10/564 , H04L25/12 , H04L25/49

68. 发明专利

JPS6349938B2 失效
公开(公告)号：JPS6349938B2
公开(公告)日：1988-10-06
申请号：JP8537980
申请日：1980-06-24
申请人： NIPPON DENKI KK , NIPPON DENSHIN DENWA KK
发明人： YAMAGUCHI MASARU , AKASHI FUMIO , KOYAMA TOORU , WAKAHARA TOSHIHIKO , SHIMADA MASAHARU
IPC分类号： H03H21/00 , H03H11/04 , H04B3/06 , H04L25/03 , H04L25/12

69. 发明专利

JPS6012825B2 失效
公开(公告)号：JPS6012825B2
公开(公告)日：1985-04-03
申请号：JP15664777
申请日：1977-12-27
申请人： FUIRITSUPUSU FURUUIRANPENFUABURIKEN NV
发明人： HANSU ERITSUKU HARUTOMAN , AREKIZANDAA SHUTORIDOO
IPC分类号： H04L25/02 , H04L25/04 , H04L25/12 , H04L25/32 , H04L29/00
摘要： ZPHM 8777 In a teleprinter equipment, a method and arrangement to transmit messages between a station and a teleprinter apparatus by feeding D.C.-pulses, representing binary coded characters in the message, through a line interconnecting the station and the teleprinter apparatus. The line has a capacitance dependent upon the length of the line. The method is characterized in that the current is regulated, at least in an interval following the closing of the line path at the beginning of a current pulse, by means of a variable impedance element included in series with the line path on the transmitter side. The variable impedance element is controlled such that the impedance value of the impedance element assumes a high value immediately after the commencement of current flow due to the closing of the line path and thereafter rapidly decreases to a low value, which is maintained during the pulse. The variable impedance may be a controllable semi-conductive element included in a constant current generator. This semi-conductive element is brought to a high impedance value in the transient intervals immediately after commencement of current flow and then its impedance value is decreased.

70. 实用新型

JPS59137655U JPS59137655U - 失效
公开(公告)号：JPS59137655U
公开(公告)日：1984-09-13
申请号：JP2991183
申请日：1983-03-03
IPC分类号： H04L1/00 , H03K5/19 , H04B3/06 , H04B3/10 , H04L25/03 , H04L25/12

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