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公开(公告)号：JPS623511A
公开(公告)日：1987-01-09
申请号：JP14338485
申请日：1985-06-29
Applicant: NEC CORP
Inventor： TAKIZAWA KENJI
IPC: H03C1/28
Abstract: PURPOSE:To suppress a phase fluctuation of a high frequency signal to a small value by connecting the 1st power supply between a cathode of a large power amplitude tube and a body and connecting the 2nd power supply independently of the 1st power supply between a collector and the cathode. CONSTITUTION:The amplifier tube 1 is provided with a cathode terminal 11, a grid terminal 2, a body terminal 13 and a collector terminal 14. A grid modulator 2 outputs a grid voltage to the amplitude tube 1, a voltage is given between the body terminal 13 and the cathode terminal 1 from a power supply 8 and a power suppl 9 gives a voltage to the collector terminal 14 with respect to a potential at the cathod terminal 11. Thus, the voltage fluctuation of the cathode is suppressed, resulting in suppressing the phase fluctuation of a high frequency signal being an output of the amplifier tube to a small value.
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公开(公告)号：JPS58184811A
公开(公告)日：1983-10-28
申请号：JP6710982
申请日：1982-04-23
Applicant: Nec Corp
Inventor： TAKIZAWA KENJI , MORIGUCHI YUKIO
Abstract: PURPOSE: To attain stable operation at starting, by decreasing the repetitive frequency of a modulation pulse less than that at normal operation, at the application of high voltage to the transmitter, without fixing the repetitive frequency of the modulation pulse impressed to a power amplifier tube to a value at the normal operation.
CONSTITUTION: When a high voltage is applied to the transmitter, the high voltage is impressed to the power amplifier tube 1. In inputting a transmission trigger 15 next, a variable frequency pulse generator 3' transmits a pulse having a repetitive frequency lower than that at the normal operation to a modulator 2 in response to a repetitive frequency control signal 16 for the start of operation from a control signal output means 4. The modulator 2 amplifies this pulse and impresses it to the power amplifier tube 1, which amplifies a high frequency input signal 11 with the pulse having a low repetitive frequency applied. After the elapse of a prescribed time, when the pulse generator 3' receives the signal 16 for the normal operation from the means 4, the repetitive frequency of the pulse transmitted to the modulator 2 is returned to that at the normal operation. Thus, the power amplifier tube 1 makes amplification with the normal duty ratio.
COPYRIGHT: (C)1983,JPO&JapioAbstract translation: 目的：为了在启动时获得稳定的运行，通过降低调制脉冲的重复频率小于正常工作的频率，在向发射机施加高电压时，不会将施加到功率放大管的调制脉冲的重复频率固定 达到正常运行的值。 构成：当向发射机施加高电压时，向功率放大管1施加高电压。接着，在输入发送触发器15时，可变频率脉冲发生器3'发送重复频率低于 响应于来自控制信号输出装置4的开始操作的重复频率控制信号16对调制器2进行正常操作。调制器2放大该脉冲并将其印制到功率放大器管1上，功率放大器管1放大高频 输入信号11具有施加低重复频率的脉冲。 在经过规定时间之后，当脉冲发生器3'从装置4接收到用于正常操作的信号16时，发送到调制器2的脉冲的重复频率返回到正常操作。 因此，功率放大管1以正常占空比进行放大。
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公开(公告)号：JPS61217784A
公开(公告)日：1986-09-27
申请号：JP5897885
申请日：1985-03-23
Applicant: NEC CORP
Inventor： TAKIZAWA KENJI
Abstract: PURPOSE:To achieve a higher reliability, by arranging multiple units of antenna opening surfaces each along a specified spherical surface in an azimuth range and an elevation angle range as specified. CONSTITUTION:A radar is made up of a plurality of antenna/transmitter/receiver units 1, a timing controller 2, a signal processor 3 and an indicator 4. For example, the units 1 are arranged in the number of (n) for the azimuth way and (m) for the elevation way and an antenna opening surface in each unit 1 is arranged along the hemispherical surface. Transmitting/receiving operation in each unit 1 is started by a timing start signal from a controller 2 and the transmitters 7 of one or several units 1 transmit a transmission power to the antenna 5 and radiation is done from the antenna 5 receiving this power to start the reception continually to obtain a received signal from the receiver 8. These received signals are all sent to a signal processor and after a necessary processing is done, they are sent to the indicator 4 together with azimuth data and elevation data to indicate.
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Patent Agency Ranking
公开(公告)号：JPS63298385A
公开(公告)日：1988-12-06
申请号：JP13463487
申请日：1987-05-29
Applicant: NEC CORP
Inventor： TAKIZAWA KENJI
IPC: G03B21/132 , G02F1/13 , G09F9/00
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公开(公告)号：JPS62154157A
公开(公告)日：1987-07-09
申请号：JP29593385
申请日：1985-12-27
Applicant: NEC CORP
Inventor： TAKIZAWA KENJI
Abstract: PURPOSE:To change easily the task of a terminal equipment by processing data and programs read out of the files shown by task selection data transmitted to a host computer from the terminal equipment through this terminal equipment. CONSTITUTION:When file selection data is inputted from a keyboard 9 of a terminal equipment 3, a microprocessor 7 sends selection data to a CPU 4 of a host computer 1 via an interface circuit 8, a communication circuit 2 and an interface circuit 6. The CPU 4 reads data and programs out of a designated file 5, and sends them to the processor 7. The processor 7 stores those data and programs in a RAM 11 and works with the program of the RAM 11. In such a way, the task of the equipment 3 can be easily changed.
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公开(公告)号：JPH01228251A
公开(公告)日：1989-09-12
申请号：JP5521988
申请日：1988-03-08
Applicant: NEC CORP
Inventor： TAKIZAWA KENJI
Abstract: PURPOSE:To prevent reception from an opponent from whom it is undesirous to receive from being performed and to prevent mischievous telephone and sale telephone from being received by attaching a function to select the reception of telephone by registering a telephone number. CONSTITUTION:When a telephone set is connected to a telephone line, a decoder 2 monitors a registration number from an outgoing side, and decodes the signal of an encoded telephone number, and sends a decoded telephone number signal to a comparison part 4. The comparison part 4 compares the signal with a registered telephone number, and when it decides that it is a call from the registered telephone, calls a person receiving the call from a voice generation part 8 by a buzzer tone or a melody tone. When it is decided that the call is not from the registered telephone in the comparison part 4, a message to answer impossible on the telephone is informed from the recording and reproducing device of a storage part 6 to a party A, and the fact to enable the message to be recorded is informed. In such a way, it is possible to prevent the mischievous telephone or the sale telephone from being received.
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公开(公告)号：JPS6366480A
公开(公告)日：1988-03-25
申请号：JP21196986
申请日：1986-09-09
Applicant: NEC CORP
Inventor： TAKIZAWA KENJI
IPC: G01S7/12
Abstract: PURPOSE:To enable the monitoring of a airplane near a landing point while monitoring the airplane approaching a control zone of a radar with one screen, by arranging a screen display of a plan position indicator (PPI) on a logarithmic scale. CONSTITUTION:When a transmission trigger 2a synchronizing with a radar transmission pulse is applied to a timing control circuit 2, the circuit outputs a sweep gate signal 2b, a brightness gate signal 2c and a range mark gate signal 2d separately. Receiving the signal 2b, a logarithmic sweep generating circuit 3 generates logarithmic signals 3a and 3b to perform a logarithmic sweeping of vertical and horizontal axes based on the vertical component 10 and the horizontal component 1d to the antenna bearing from a bearing control generation circuit 1 as reference. The signals 3a and 3b are amplified in the current with respective deflection circuits 7a and 7b to drive a deflection coil 9 of a CRT8, which generates a PPI sweep to perform a logarithmic display of a distance direction alone on the CRT8. Thus, an airplane approaching a radar control zone can be displayed on one screen together with an airplane near a landing point thereby permitting the monitoring of both the airplanes.
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公开(公告)号：JPS5730242A
公开(公告)日：1982-02-18
申请号：JP10562080
申请日：1980-07-31
Applicant: Nec Corp
Inventor： TAKIZAWA KENJI , HASEGAWA MASANOBU
CPC classification number: H01J19/82
Abstract: PURPOSE:To prevent the occurrence of the voltage higher than the absolute max. rated voltage when a high speed discharge protector is operated, by connecting one power source system discharge loop to another power source system through a diode. CONSTITUTION:A high speed discharge protector is composed of a discharge tube 11, current limiting resistors 17-20, diode 23, current detecting circuit 21 and a trigger drive 22. The resistors 19, 20 are connected in series to a capacitor 12 for the purpose of limiing the arcing current occurring between a cathode and a body, while the resistors 17, 18 are connected in series to a capacitor 15 for the purpose of limiting the arcing current occurring between a collector and the body. The discharge tube 12, capacitor 12 and the resistor 20 will constitute one loop while the discharge tube 11, resistors 18, 20, capacitor 15 and the diode 23 will constitute another loop.
Abstract translation: 目的：防止电压高于绝对最大值的发生。 通过一个二极管将一个电源系统放电回路连接到另一个电源系统，高速放电保护器工作时的额定电压。 构成：高速放电保护器由放电管11，限流电阻器17-20，二极管23，电流检测电路21和触发驱动器22组成。电阻器19,20串联连接到电容器12，用于 为了限制发生在集电体和主体之间的电弧电流，电阻器17,18与电容器15串联连接，因此限制了在阴极和体之间产生的电弧电流的目的。 放电管12，电容器12和电阻器20将构成一个环路，而放电管11，电阻器18,20，电容器15和二极管23将构成另一环路。
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