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51. 发明专利

JPS5811784B2 失效
公开(公告)号：JPS5811784B2
公开(公告)日：1983-03-04
申请号：JP12680879
申请日：1979-10-03
申请人： HITACHI LTD
发明人： MIZOKAWA SADAO
IPC分类号： H04L25/02 , H04L1/20 , H04L7/00 , H04L25/52

52. 发明专利

JPS584494B2 失效
公开(公告)号：JPS584494B2
公开(公告)日：1983-01-26
申请号：JP9084674
申请日：1974-08-09
申请人： HITACHI LTD
发明人： TAKAHASHI MASAHIRO , YANAKA MASAO , MIZOKAWA SADAO
IPC分类号： H04L25/49 , H03D3/00 , H03L7/08 , H03M5/12 , H04B1/00 , H04L7/00 , H04L27/22

53. 发明专利

JPS57129048A LOOP DATA TRANSMITTING DEVICE 失效
公开(公告)号：JPS57129048A
公开(公告)日：1982-08-10
申请号：JP1425381
申请日：1981-02-04
申请人： HITACHI LTD
发明人： MIZOKAWA SADAO , TAKAHASHI MASAHIRO , YASUMOTO SEIICHI
IPC分类号： H04B10/27 , H04B10/079 , H04B10/275 , H04B10/29 , H04L7/00 , H04L12/42 , H04L12/437
摘要： PURPOSE:To prevent an output of an erroneous receiving data due to cut-off of an input signal, by providing a means for detecting the periodicity of a receiving data, and a means for detecting the synchronization of a PLL circuit, on a station having the PLL circuit for reproducing a clock signal from a received data. CONSTITUTION:Plural stations 1-6 are connected so as to constitute a closed loop of a common bus 7. On one station being a master station, a clock generator which becomes the base for transmitting and sending a data is provided, and also on other stations, PLL for reproducing a clock signal is provided. In order to prevent sending out an erroneous output signal even when each station is in a state that no signal is inputted, a control means for stopping sending out a data for a prescribed time when an input signal has lost the periodicity, and allowing to send out a data in case the PLL is in a synchronizing state after the prescribed time has passed is provided on the stations except the master station.

54. 发明专利

JPS56112160A SIGNAL TRANSMITTING DEVICE 失效
公开(公告)号：JPS56112160A
公开(公告)日：1981-09-04
申请号：JP1531480
申请日：1980-02-08
申请人： HITACHI LTD
发明人： MIZOKAWA SADAO , OKADA MASAKAZU
IPC分类号： H04L5/14 , H04L12/437 , H04L29/14
摘要： PURPOSE:To enable easy diagnosis of a device by sending prescribed data from transmitting side of the device section and checking normality of the transmitting device by comparing said data with the transmission data after receiving this with the same transmitting device. CONSTITUTION:Data sent from other transmitting device through transmission path 50 are received and transferred to a device section 61 connected to the transmitting device. In the case where the data are sent to other device section 61, the transmission data sent from the device section are inputted to a control section 71, and the data are sent to other transmission path through a transmission path 51 via a transmitting and receiving section 81, a switching section 91. In testing mode, trnamitting and receiving terminals of the transmitting device are connected and a self loop is formed independently by the transmitting device to be tested. Prescribed data are sent from the transmitting side of the device section 61. After receiving the data by the same transmitting device, normality of the transmission data. Thus, the device is diagnosed easily.

55. 发明专利

JPS56112150A SIGNAL TRANSMITTING DEVICE THAT SELFFDIAGNOSES TRANSMITTING CAPACITY 失效
公开(公告)号：JPS56112150A
公开(公告)日：1981-09-04
申请号：JP1532480
申请日：1980-02-08
申请人： HITACHI LTD
发明人： MIZOKAWA SADAO , FUSHIMI HITOSHI
IPC分类号： H04B10/07 , H04B10/00 , H04B10/035 , H04B10/038 , H04B10/073 , H04B10/077 , H04B10/291 , H04L12/42 , H04L12/437
摘要： PURPOSE:To measure the transmitting capacity of a circuit quantitatively by comparing received data with prescribed transmission data and, if the action is normal for prescribed time, repeating the action after increasing the set attenuation of the attenuator by a fixing quantity. CONSTITUTION:A switching section 91 is actuated with a signal 21a, and transmission paths 50, 51 are by-passed with a transmission path 52. Transmitting and receiving terminals of a transmitting and receiving section 81 are connected through an attenuator 56. Prescribed data transmitted from a computer 21 transmit and receive data via buffer 4, a transmission circuit 6, a transmitter 8, an LED and through a self loop that passes the attenuator 56, and test the action by comparing the received data with prescribed transmission data. At this time, if the prescribed time action is normal, the same action is repeated increasing the set quantity of attenuation of the attenuator 56 by a predetermined quantity. Thus, the transmitting capacity of the circuit can be measured quantitative by increasing the quantity of attenuation and confirming the action at each time.

56. 发明专利

JPS56111812A ROTARY OPTICAL SWITCH 失效
公开(公告)号：JPS56111812A
公开(公告)日：1981-09-03
申请号：JP1531280
申请日：1980-02-08
申请人： HITACHI LTD
发明人： MIZOKAWA SADAO , ITOU YOSHIJI , HOSODA YASUO , AIDA HIROSHI , OKADA TADAAKI , OONISHI HIROAKI , YASUMOTO SEIICHI , JIYOUMI HITOSHI , IDE TOSHIYUKI , KUWABARA HIROSHI
IPC分类号： G02B26/02 , G02B6/35 , G02B26/08
摘要： PURPOSE:To change-over connection states of optical fibers at the same time, by oppositely arranging a couple of optical fiber fitting member rotatable on the axis. CONSTITUTION:Fitting members 81 and 82 for optical fibers are installed in case 80; member 81 is fixed on shaft 83 connected direct to motor 84, and member 82 is fixed to the case. Members 81 and 82 have contiguous opposing plane parts and are provided with butt connection parts between optical fibers 90-93, and 94-97. Normally, fibers 90 and 94, 91 and 95, 92 and 96, and 93 and 97 are opposed mutually to form the transmission line, and rotating member 81 changes fiber 90 over from 94 to 95 and 92 from 96 to 97.

57. 发明专利

JPS5559549A ADDRESS CONTROL CIRCUIT 失效
公开(公告)号：JPS5559549A
公开(公告)日：1980-05-06
申请号：JP13149878
申请日：1978-10-27
申请人： HITACHI LTD
发明人： MIZOKAWA SADAO
IPC分类号： G06F9/26 , G06F9/22
摘要： PURPOSE:To obtain a high-speed address control circuit featuring the low power consumption by providing the gate circuit which generates the signal to control the flow of the microprogram plus the flip-flop which detects the satisfaction of the conditions at execution of the conditional branch order. CONSTITUTION:FF28-32 are reset for the period when flag FF7-11 are not set and while the unsatisfaction of the conditions is detected at detector circuits 17-21 for registers 12-16. At the same time, the conditions of gate 33 output is not satisfied, and FF35 which shifted the output is reset. And the state of control signal 6X is varied for gate 36 when the output of gate 33 arrives. After setting the conditional flag, the output of gate 33 is delivered, and the output of 6X of gate 36 is delivered. The output of gate 33 is shifted in the next cycle to shift the output of FF34 memorised to FF35, and the output of gate 33 is extracted at gate 36 to inhibit signal 6X. At the same time, the output of FF34 resets FF7-11 via gate 22.

58. 发明专利

JPS54133856A TIMING GENERATING CIRCUIT 失效
公开(公告)号：JPS54133856A
公开(公告)日：1979-10-17
申请号：JP4120178
申请日：1978-04-10
申请人： HITACHI LTD
发明人： MIZOKAWA SADAO , NISHIDA TAKEHIKO , FUKAZAWA SHIGERU
IPC分类号： G06F1/06 , G06F1/04
摘要： PURPOSE:To make it possible to stop and reset a computer timing pulse without stopping a reference clock, by allowing a control circuit to expand and reset the timing pulse. CONSTITUTION:To generate normal operation timing, a stop signal from control circuit 3 is OFF, timing generating circuit 2 is allowed to operate, and timing generating circuit 4 and control circuit 5 are both inhibited from operating, thereby generating timing pulses (b), (c), (d), and (e). Under the condition that timing pulses should be expanded in the prescribed period, control circuit 3 expands and resets timing pulses synchronizing with a reference clock. Consequently, it is possible to stop and reset computer timing pulses without stopping the reference clock.

59. 发明专利

JPS526014A LINE SWITCHING SYSTEM 失效
公开(公告)号：JPS526014A
公开(公告)日：1977-01-18
申请号：JP8180475
申请日：1975-07-04
申请人： HITACHI LTD
发明人： ISHIDA KOUICHIROU , MIZOKAWA SADAO , YASUDA HAJIME
IPC分类号： H04B3/04 , H04B1/74 , H04B3/00
摘要： PURPOSE:In a line switching system of the amplification type date highway system where a number of equipments are linked with lines and each equipment receives a signal from an upper line and sends it to a lower line after amplification and waveform shaping, the return to the line of each station shall be conducted through the command from the line in such a manner of the cut off to the line, and the signal line for commanding the return other than the line be deleted.

60. 发明专利

JPS5119465A 失效
公开(公告)号：JPS5119465A
公开(公告)日：1976-02-16
申请号：JP9084674
申请日：1974-08-09
申请人： HITACHI LTD
发明人： TAKAHASHI MASAHIRO , TANINAKA MASAO , MIZOKAWA SADAO
IPC分类号： H04L25/49 , H03D3/00 , H03L7/08 , H03M5/12 , H04B1/00 , H04L7/00 , H04L27/22

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