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31. 发明专利

CA2054592A1 PLUG AND RECEPTACLE OF A MICROSTRIP LINE CONNECTOR 未知
公开(公告)号：CA2054592A1
公开(公告)日：1992-05-14
申请号：CA2054592
申请日：1991-10-31
申请人： JAPAN AVIATION ELECTRONICS INDUSTRY LIMITED , NEC CORPORATION
发明人： SUZUKI, TAKAO , UESUGI, HIROSHI , TAMURA, YOSHIHARU , HIRASAWA, NAOKI , MATSUMOTO, HIROFUMI
IPC分类号： H01R24/00 , H01P1/04 , H01P3/08 , H01P5/08
摘要： In a plug (100) and a receptacle of a microstrip line connector, the plug has a rectangular parallelpipedic insulating support block (130), a signal contact (120) projecting upward from the center of the insulating support block and a pair of L-angle brackets (115,116) projecting out upward from both ends of the insulating support block, the pair of brackets being connected to opposite ends of a coupling plate portion (111) provided along the side wall surface of the insulating support block. The coupling plate portion has at the center of its lower marginal edge a recess (112) formed astride a signal conductor (303) of a microstrip line (301) provided on a printed circuit board (300). The receptacle is made up of a rectangular parallelpipedic insulating housing (210) having three contact housing rooms defined by two partition walls (216,217), a signal socket contact (230) housed in the central contact housing room, a U-shaped ground socket contact (220) having two contact portions housed in the both side contact housing rooms, and a shield cover (240) mounted on the insulating housing in a manner to cover almost all over its back and hold its top and bottom panel portions. The insulating housing has a contact introducing hole (212A) made in its front panel portion centrally thereof and communicating with the central contact housing room, for receiving the signal contact of the mating plug. The insulating housing has slots (211) made in its both side panel portions in the front-to-back direction and communicating with the both side contact housing rooms, for receiving opposed edges of the pair of L-angle brackets.

32. 发明专利

CA2046689A1 LIQUID COOLING APPARATUS 未知
公开(公告)号：CA2046689A1
公开(公告)日：1992-01-13
申请号：CA2046689
申请日：1991-07-10
申请人： NEC CORPORATION
发明人： ASAKAWA, KYOICHI
IPC分类号： F25B49/02 , G05D23/00 , G05D23/19 , H05K7/20

33. 发明专利

CA2044351A1 FAST CALCULATION APPARATUS FOR CARRYING OUT A FORWARD AND AN INVERSE TRANSFORM 未知
公开(公告)号：CA2044351A1
公开(公告)日：1991-12-13
申请号：CA2044351
申请日：1991-06-11
申请人： NEC CORPORATION
发明人： IWADARE, MASAHIRO
IPC分类号： G10L25/00 , G06F17/14 , G10L15/02 , G10L17/00 , G10L19/00 , G10L19/02 , G10L25/18 , H04N1/41 , H04N19/423 , H04N19/60 , H04N19/625 , H04N19/85
摘要： In an apparatus for carrying out a linear transform calculation on a product signal produced by multiplying a predetermined transform window function and an apparatus input signal, an FFT part (23) carries out fast Fourier transform on a processed signal produced by processing the product signal in a first processing part (21). As a result, the FFT part produces an internal signal which is representative of a result of the fast Fourier transform. A second processing part (22) processes the internal signal into a transformed signal which represents a result of the linear transform calculation. The apparatus is applicable to either of forward and inverse transform units (11, 12).

34. 发明专利

CA2026681A1 COOLANT SUPPLY APPARATUS FOR LIQUID-COOLED ELECTRONIC DEVICE 未知
公开(公告)号：CA2026681A1
公开(公告)日：1991-04-04
申请号：CA2026681
申请日：1990-10-02
申请人： NEC CORPORATION
发明人： UMEZAWA, KAZUHIKO
IPC分类号： F17D1/08 , F25D9/00 , G06F1/20 , H05K7/20

35. 发明专利

CA2021361A1 QUADRATURE DEMODULATION OF A DATA SEQUENCE FOLLOWING A PARTICULAR SIGNAL SEQUENCE WITH A LOCAL REFERENCE CARRIER SIGNAL HAVING A FREQUENCY DIFFERENT FROM A RECEIVED CARRIER SIGNAL 未知
公开(公告)号：CA2021361A1
公开(公告)日：1991-01-18
申请号：CA2021361
申请日：1990-07-17
申请人： NEC CORPORATION
发明人： MUTO, HIROYASU
IPC分类号： H04L27/14 , H04L7/033 , H04L7/04 , H04L27/00 , H04L27/22 , H04L27/233
摘要： A phase modulated signal is quadrature demodulated (37) using a locally generated (36) signal which has a frequency different from that of the received carrier. The demodulation of a known symbol sequence and of a data symbol sequence respectively result in first and second signal vectors. The first signal vector has in-phase and quadrature components, which are converted to phase values (substantially at the symbol rate). An error signal is formed by comparing (44) the phase difference between adjacent symbols (42,43) with a reference (45). The error signal is averaged (46), and the average value (47) is used to correct (39) the second signal vector. The correction signal may be generated using the received carrier signal.

36. 发明专利

CA2019935A1 OUTPUT WAVEFORM CONTROL CIRCUIT 未知
公开(公告)号：CA2019935A1
公开(公告)日：1990-12-27
申请号：CA2019935
申请日：1990-06-27
申请人： NEC CORPORATION
发明人： HORI, TSUGUO
IPC分类号： H04L27/00 , H03G3/20 , H04B1/04 , H04J3/00
摘要： An output waveform control circuit for a time division multiple access system (TDMA), including a second driving circuit (6) which sends a control signal to the power amplifier (4) in accordance with a signal outputted by the comparator circuit (8). Thus, by controlling the operating voltage of the power amplifier simultaneously with the control of the level input signal from the input level control circuit (3), the output characteristic of the power amplifier (4), including a class C or the like amplifier having a non-linear input/output characteristic, is prevented from varying abruptly, and the output waveform of the power amplifier (4) is so controlled as to have gently sloped leading and trailing edges.

37. 发明专利

CA2019592A1 FREQUENCY SETTING METHOD FOR RADIO TRANSMISSION APPARATUS 未知
公开(公告)号：CA2019592A1
公开(公告)日：1990-12-23
申请号：CA2019592
申请日：1990-06-22
申请人： NEC CORPORATION
发明人： SHIMIZU, HIROYUKI
IPC分类号： H04J13/00 , H03J5/02 , H04B1/7136 , H04J4/00
摘要： A frequency setting system for a radio transmission apparatus of the type transmitting a signal in the form of bursts and changing transmission frequency burst by burst. A frequency division data generator (30) feeds both a frequency division data signal representative of a frequency division number and a strobe signal representative of frequency setting to a frequency synchesizer (20). A strobe pulse is fed to the frequency synthesizer immediately after the end of the preceding burst. The frequency division data signal for the next burst can then be sent at any time in the period between that strobe pulse and the end of the burst to which it relates. The timings for generating the frequency division data signal and strobe signal do not need to be determined with regard to the locking time of the frequency synthesizer which is dependent on the kind of the synthesizer, and the frequency, etc.

38. 发明专利

CA2019150A1 INFORMATION PROCESSING SYSTEM COMPRISING A MAIN MEMORY HAVING AN AREA FOR MEMORIZING A STATE SIGNAL RELATED TO A DIAGNOSING OPERATION 未知
公开(公告)号：CA2019150A1
公开(公告)日：1990-12-19
申请号：CA2019150
申请日：1990-06-18
申请人： NEC CORPORATION
发明人： IWATA, JUN
IPC分类号： G06F11/14 , G06F11/00 , G06F11/16 , G06F11/22 , G06F11/267 , G06F11/30 , G06F15/16 , G06F15/177
摘要： In an information processing system comprising a diagnosing unit (15) for carrying out, in response to an activation signal (17), a diagnosing operation on a main memory (10), a standard processor (11 or 12), and a system controller (13), a state indication area (20) memorizes a state signal which is produced by a monitoring unit (18) monitoring the diagnosing unit to indicate whether the diagnosing operation is possible and impossible and which, when the diagnosing operation is impossible, makes a diagnosis control unit (19) control retry of the diagnosing operation. Through a request controller (27) operable as a read request supply unit, the state signal is read by a read request signal produced by a signal producing unit (21) to make a judging unit (29) make a delivery control unit (24) allow and inhibit, when the diagnosing operation is possible and impossible, delivery as the activation signal of a communication signal produced by the signal producing unit through a communication controller (25) operable as a communication request supply unit. The state signal is stored in the state indication area by a write request signal produced by the signal producing unit and sent through the request controller which is now operable as a write request controller.

39. 发明专利

CA2017003A1 DIVERSITY RECEIVING APPARATUS 未知
公开(公告)号：CA2017003A1
公开(公告)日：1990-11-19
申请号：CA2017003
申请日：1990-05-17
申请人： NEC CORPORATION
发明人： FUKUMURA, YUKIO
IPC分类号： H04B7/08

40. 发明专利

CA2010652A1 ECHO CANCELLER HAVING FIR AND IIR FILTERS FOR CANCELLING LONG TAIL ECHOES 未知
公开(公告)号：CA2010652A1
公开(公告)日：1990-08-23
申请号：CA2010652
申请日：1990-02-22
申请人： NEC CORPORATION
发明人： KOIKE, SHIN'ICHI
IPC分类号： H04B3/23

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