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1. 发明专利

JPH09214336A DOUBLE COMPARISON TYPE SYNTHESIZER OSCILLATOR 失效
公开(公告)号：JPH09214336A
公开(公告)日：1997-08-15
申请号：JP1852296
申请日：1996-02-05
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： H03L7/18 , H03L7/16
摘要： PROBLEM TO BE SOLVED: To increase the operating frequency of the oscillator by decreasing the operating frequency of a program divider with a simple configuration. SOLUTION: Frequencies f1, f3 of crystal oscillators 111 , 112 are multiplied respectively by an output f2 of a voltage controlled oscillator 19 (f1>f2>f3) by multipliers 141 , 142 and low pass filters 151 , 152 are used to detect frequencies (f1-f2),(f3-f2), the frequencies are frequency-divided into 1/n, 1/m by programmable dividers 161 , 162 , the frequencies are compared with a frequency comparator 17, a difference between the frequencies is converted into a voltage by a low pass filter 18 to control the voltage controlled oscillator 19. Since the output f2 is expressed as (m.f1+nf3)/(n-m), a high frequency f2 is outputted without increasing the frequency division ratios (n), (m) of the programmable dividers 161 , 162 .

2. 发明专利

JPH08251187A RADIO COMMUNICATION SYSTEM 失效
公开(公告)号：JPH08251187A
公开(公告)日：1996-09-27
申请号：JP5215095
申请日：1995-03-13
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： H04B7/24 , C04B41/48 , H04L12/28
摘要： PURPOSE: To avoid collision while executing the transmission of a CSMA/CD (carrier sense multiple access/collection detection) system in a radio communication system to execute data transmission among plural radio equipments by a distributed control system. CONSTITUTION: In the case where a station A and the station C transmit request signals once at time t0 to the station B and the station D respectively, the stations B and D return ACK(acknowldge character) signals respectively after some period in which waiting time is set. When the priority of the station B is higher, the station B returns the ACK signal (time t1 ). This ACK signal is received by the stations A and C at time t2 , and since the station A judges it to be the ACK signal addressed to its own station, it transmits data in succession. On the contray, the station C recognizes the collision because the first ACK signal is not addressed to its own station, and it disconnects the transmission at the time of the transmission (time t3 ) and the reception (time t4 ) too of the ACK signal from the station D.

3. 发明专利

JPH0832627A BIPOLAR OPTICAL CONVERSION TYPE TRANSMISSION EQUIPMENT 失效
公开(公告)号：JPH0832627A
公开(公告)日：1996-02-02
申请号：JP16046994
申请日：1994-07-13
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： H04B10/40 , H04B10/50 , H04B10/524 , H04B10/60 , H04L25/02 , H04L25/49 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
摘要： PURPOSE:To provide an inexpensive bipolar optical conversion type transmission equipment whose transmission speed can be reduced and whose reliability is high. CONSTITUTION:On a transmission-side, the transmission speed of an optical module in an electric to optic conversion circuit 10 is set to be half by dividing a frequency by a frequency-dividing means consisting of a flip flop 1. On a reception-side transmission speed is set to be 7 half by differentiating the output of an optic to electric conversion circuit 12 by a timer 14 and demodulating the result by an exclusive gate 15.

4. 发明专利

JPH0653916A TIME-DIVISION MULTIPLEX DATA TRANSMISSION SYSTEM 失效
公开(公告)号：JPH0653916A
公开(公告)日：1994-02-25
申请号：JP20633392
申请日：1992-08-03
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： H04J3/00 , H04J3/06 , H04L7/02
摘要： PURPOSE:To simplify a control circuit and a hardware by adding offset components to the multiplexed data bits at a transmitting part, and transmitting the data, and breaking down the mutliplexed bits into each bit at a receiving part. CONSTITUTION:At a transmitting part 10, the multiplexed data are transmitted while a transmission level is shifted. That is, the offset components are added to each bit, and transmitted. Then, the offset components are prepared by a counter 12 and a D/A converter 13, inputted to an adder 14, and transmission data are transmitted. At a receiving part 20, a deviation signal Ca is obtained by a first comparator 22a being a synchronization detecting comparator. A PLL 23 demodulates a clock signal from the signal Ca, and obtains a received clock. A counter 24 is cleared by the received clock signal and a synchronizing part, and the output signal of the counter 24 is converted into an analog signal by a D/A converter 25, and inputted to a comparator 22b. Then, the offset components are canceled, each bit component is taken out, and the taken-out bit is written in a register 27.

5. 发明专利

JPH063446A POSITION SENSOR 失效
公开(公告)号：JPH063446A
公开(公告)日：1994-01-11
申请号：JP16327892
申请日：1992-06-23
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： G01S15/32 , G01S15/42
摘要： PURPOSE:To enable the detection of distance and direction by a method wherein search signals the same but a phase differencc therebetween are outputted from transmitters arranged at specified interval to create varying intensity, weak or strong, of a signal by the resultant interference while thc phase difference and frequency are changed to very a point of intensifying the signals mutually. CONSTITUTION:Transmitters 1a and 2a are arranged at a specified interval to output search signals the same but a phase difference therebetween by a signal transmitted from an oscillator 1 and a reflection signal of the search signals combined is received with a receiving sectim 3 to fetch a signal alone after a fixed time with a receiver 4. As a result, a reflected wave from the maximum signal point is given at the first peak and the resulting time difference represents the distance to an ajbject. When the phase of output signals of the transmi tters 1. and 2., and the cycle thereof are changed to shift the maximum point of the intensity of the signal, the received signal is mixed with the reflected waves from a plurality of objects thereby enabling the learning of the positions betaof the objects from time differences and intensity of the individual reflected waves.

6. 发明专利

JPH02134005A DC AMPLIFIER 失效
公开(公告)号：JPH02134005A
公开(公告)日：1990-05-23
申请号：JP28835888
申请日：1988-11-15
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： G05B11/26 , H03F1/30 , H03F3/34
摘要： PURPOSE:To attain high stability by providing a diode and a time constant circuit between a DC amplifier and an integration circuit and supplying an output of the time constant circuit to the integration circuit. CONSTITUTION:An output signal of a DC amplifier 11 is led to a time constant circuit 14 via a diode 13 and the signal is outputted to an integration circuit 12, in which the deviation with a setting signal is obtained and the deviation signal is fed back negatively to the DC amplifier 11. Thus, a DC output not affected by a drift such as an offset error or temperature change is obtained. Thus, the output of the DC amplifier 11 is not distorted to obtain a stable amplifier.

7. 发明专利

JP2019022048A 空間光通信システムおよび空間光通信システムのデータ送受信方法审中-公开
公开(公告)号：JP2019022048A
公开(公告)日：2019-02-07
申请号：JP2017137890
申请日：2017-07-14
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： OZEKI EMIKO , KATSUMATA NORIAKI
IPC分类号： H04B10/114 , H04B10/075 , H04W84/12 , H04W88/08
摘要：【課題】空間光通信における通信路を広い範囲にわたって確保し、安定した通信が行えるようにする。【解決手段】移動可能に構成された空間光送受信器211およびこれに接続されてデータの送受信を行う端末側電子機器210と、分散配置された複数の空間光送受信器221A〜221C、およびデータの送受信を行うホスト側電子機器220、およびこれに接続され前記空間光送受信器221A〜221Cを選択する信号選択器300とを有し、前記空間光送受信器211と221A〜221C間の光伝送路に常時IDLE信号を流し、その信号の強度が最大となる空間光送受信器221A〜221Cのいずれかを選択し、それを介してデータの送受信を行う。【選択図】図1

8. 发明专利

JPH09252277A RELAY SYSTEM IN MOBILE COMMUNICATION 失效
公开(公告)号：JPH09252277A
公开(公告)日：1997-09-22
申请号：JP5864396
申请日：1996-03-15
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： H04B7/26 , H04B7/14
摘要： PROBLEM TO BE SOLVED: To send efficiently local information over a wide range by allowing a relay station share communication information of a master station. SOLUTION: In the case of mobile stations A-D each having a relay station, information sent from a stationarv station is at first received by the mobile station A and processed therein according to transmitter side algorithm and receiver side algorithm and then relayed to the mobile station B. The information is sequentially relayed from the mobile station B to the mobile stations C, D. In order to relay the information in this way, the information is sent over a wide range regardless of small power communication. Furthermore, the information is localized by the specification of upper limit of re-transmission. Thus, a defect such as crosstalk at the outside of the desired area caused by large power communication is prevented because of small power communication.

9. 发明专利

JPH09215315A SWITCHING DC POWER SUPPLY 失效
公开(公告)号：JPH09215315A
公开(公告)日：1997-08-15
申请号：JP1723096
申请日：1996-02-02
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： H02J1/00 , G05F1/10 , G05F1/56 , H02M1/12 , H02M3/00
摘要： PROBLEM TO BE SOLVED: To provide a switching DC power supply for reduction in size while controlling transient variation of a DC voltage due to the variation of the load. SOLUTION: This power supply obtains an square wave output by switching a DC input with a switching means 1, also obtains a DC output by eliminating harmonics of the square wave output with a filter means 2 and controls the switching width by detecting a difference between the DC output voltage and the reference voltage with an error amplifier means 3. In this case, a load current and an input current of the filter means are detected by current detectors 7, 8, a difference between both detected currents is detected by a differential amplifier 9, only a transient variation is extracted from this detected current with a band-pass filter 10, this detected value is added to an output of the error amplifier by an adder 11 to generate a switching width modulation signal of a comparator 5 in order to compensate for a transient voltage change due to the sudden change of the load by means of the current control system.

10. 发明专利

JPH07131492A MULTISTAGE REPEATING SYSTEM 失效
公开(公告)号：JPH07131492A
公开(公告)日：1995-05-19
申请号：JP27508293
申请日：1993-11-04
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： KATSUMATA NORIAKI
IPC分类号： H04L25/52 , H04L7/00
摘要： PURPOSE:To facilitate multistage repeating by enabling regenerative repeating which is excellent in follow-up performance an little in jittering by the multistage repeating system using a regenerative repeating system which regenerates a transmitted signal from a received signal and repeats it by using a digital PLL. CONSTITUTION:The regenerative repeating system has a 1st sent signal regeneration part 3 and a 2nd sent signal regeneration part 4 cascaded between a reception part 2 and a transmission part 5 to double the digital PLL. In this case, the follow-up performance is larger and larger as an N-fold clock and an M-fold clock that the digital PLLs 31 and 41 use are smaller and smaller, and the jitters are smaller and smaller as the M and N are larger and larger. For the purpose, the values of the M and N are selected in relation N

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