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61. 实用新型

CN210431403U 一种情报检索预警系统有权
公开(公告)号：CN210431403U
公开(公告)日：2020-04-28
申请号：CN201921507334.2
申请日：2019-09-10
申请人：东北林业大学
发明人：郑利远 , 丁宇婷 , 刘今越 , 焦晓光 , 张志萍
IPC分类号： H04B1/16 , H04B1/14 , G06F21/81
摘要：本实用新型公开了一种情报检索预警系统，包括情报接收电路、信号调节电路、选频电路和异常信号保护电路，情报接收电路包括用于接受无线情报信号的信号接收器E1，并将接收信号滤波后送入信号调节电路中，信号调节电路采用运放器AR1、AR2串联方式消除信号失调，最后经过选频电路对情报筛选后送入计算机中，异常保护电路的输入端连接信号调节电路的信号输入端，当计算机检测到非法情报入侵时，用于控制异常保护电路截断信号调节电路的输入信号，从而快速的对运放器AR1同相输入端信号进行短路，从接收端源头切断异常信号，从而起到很好的防御作用。

62. 实用新型

CN209913805U 一种直流失调校准电路及高速串行链路接收机有权
公开(公告)号：CN209913805U
公开(公告)日：2020-01-07
申请号：CN201920990501.7
申请日：2019-06-28
申请人：苏州兆凯电子有限公司
发明人：车大志 , 郭嵩昊 , 刘恒 , 丁力 , 李芹
IPC分类号： H04B1/12 , H04B1/14
摘要：本实用新型公开了一种直流失调校准电路及高速串行链路接收机，其中，采用多路半速率高速判决器组、多路电压选择器、高精度电阻数模转换器阵列和数字状态机连接组成直流失调校准环路，数字状态机控制该高精度电阻数模转换器阵列产生扫描电压，扫描电压作为校准电压输入该多路半速率高速判决器组的高速数据判决器，数字状态机记录该高速数据判决器跳变时的该校准电压，并将多次该高速数据判决器跳变时的该校准电压取平均值，该数字状态机生成将该平均值作为高速数据判决器直流校准的校准电压的控制信号，并将控制信号传输给该高速数据判决器，解决了在高速数据传输系统中差分信号的直流失调的问题，提供了接收机的灵敏度和数据判决的可靠性。(ESM)同样的发明创造已同日申请发明专利

63. 发明专利

JP2002043971A HIGH FREQUENCY RECEIVING DEVICE 失效
公开(公告)号：JP2002043971A
公开(公告)日：2002-02-08
申请号：JP2000230370
申请日：2000-07-31
申请人： SHARP KK
发明人： NAKAMORI TOSHIHIRO
IPC分类号： H04B1/26 , H04B1/10 , H04B1/14
摘要： PROBLEM TO BE SOLVED: To provide a high frequency receiving device that allows a filter to surely eliminate noise just after a high frequency input signal is converted into a signal with an intermediate frequency with a comparatively simple configuration and can sufficiently eliminate noise after demodulation. SOLUTION: The high frequency receiver is provided with a mixer 3 that down-converts an input high frequency signal into a 1st intermediate frequency signal and with a 2nd mixer 9 that up-converts the 1st intermediate frequency signal into a 2nd intermediate frequency signal whose frequency is higher than that of the 1st intermediate frequency signal. A demodulation circuit 6 demodulates the 2nd intermediate frequency signal.

64. 发明专利

JP2001094454A METHOD FOR SUPPLYING LOCAL OSCILLATION SIGNAL AND ITS CIRCUIT 失效
公开(公告)号：JP2001094454A
公开(公告)日：2001-04-06
申请号：JP26983199
申请日：1999-09-24
申请人： NEC SAITAMA LTD
发明人： KAWANABE YOSHITAKA
IPC分类号： H01Q3/26 , H04B1/14 , H04B1/16 , H04B1/26 , H04B7/08 , H04B7/12 , H04B15/06 , H04L1/06 , H04L27/00
摘要： PROBLEM TO BE SOLVED: To accurately reproduce propagation delay differences at antennas among received signals inputted to a plurality of receivers each adopting a small-scale circuit. SOLUTION: A frequency data generating section 6 supplies frequency data including a commonly synchronized frequency component to a plurality of the receivers 2-1-2-n. In a receiver 2-n, a local oscillation signal generating section 3-n typically represented by a D/A converter generates a local oscillation signal on the basis of a the commonly synchronized frequency data. Thus, the passing phase of the received signal outputted from an antenna 1-n via the receiver 1-n is fixed. As a result, the phase difference of the received signals by a DSP 8 through the receivers 2-1-2-n indicates the propagation delay differences of the received signals. Furthermore, the frequency data including a plurality of frequency components are supplied to the receivers 2-1-2-n. By selecting the frequency data in the inside of the receiver 2-n and applying orthogonal modulation to the selected frequency data, a local oscillation signal with intermediate frequencies mutually different from each other is generated.

65. 发明专利

JP2000341149A ELIMINATION DEVICE FOR UNWANTED WAVE 失效
公开(公告)号：JP2000341149A
公开(公告)日：2000-12-08
申请号：JP14662899
申请日：1999-05-26
申请人： ICHIBA KOJI
发明人： ICHIBA KOJI
IPC分类号： H04B1/10 , H04B1/14
摘要： PROBLEM TO BE SOLVED: To effectively eliminate noise and disturbing waves, when there is not much difference between the frequency band of a signal and that of the noise and a disturbing wave. SOLUTION: A 1st frequency converter 1 converts the frequency of a modulation wave modulated by a base band signal into a frequency which is equivalent to an integral multiples of the period of one symbol. Storage means 3, 4 store the converted modulation wave by each symbol and provide the output of a multiplied wave by each symbol, so as to spread a noise or a disturbing wave included in the modulation wave. Then the modulation wave passes through a band pass filter 9, whose center frequency is the outputted frequency of the multiplied wave and whose bandwidth is an occupied bandwidth of the modulation wave, before being multiplied so as to eliminate spread noise, and a 2nd frequency conversion circuit 10 converts the frequency of the output of the filter 9 into the frequency before being multiplied. Thus, even when there is not much difference between the frequency band of a signal and that of the noise and the disturbing wave, the noise and the disturbing wave can be eliminated effectively.

66. 发明专利

JPH06509691A 失效
公开(公告)号：JPH06509691A
公开(公告)日：1994-10-27
申请号：JP50323093
申请日：1992-07-23
IPC分类号： H04B1/10 , H04B1/14 , H04B1/26

67. 实用新型

JPH0559982U 失效
公开(公告)号：JPH0559982U
公开(公告)日：1993-08-06
申请号：JP218292
申请日：1992-01-24
IPC分类号： H04B1/14

68. 发明专利

JPS6057731B2 失效
公开(公告)号：JPS6057731B2
公开(公告)日：1985-12-17
申请号：JP6151477
申请日：1977-05-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TEODOORU ESU REEZEFUSUKII , HOORU DEII FURANTSUISU , SOTEIRIOSU SHIDARISU
IPC分类号： H04N5/44 , H03J5/00 , H03J5/02 , H03J7/02 , H03J7/06 , H04B1/10 , H04B1/14 , H04B1/26

69. 发明专利

JPS5928084B2 JPS5928084B2 - 失效
公开(公告)号：JPS5928084B2
公开(公告)日：1984-07-10
申请号：JP5004775
申请日：1975-04-24
申请人： Sony Corp
发明人： OOSAWA MITSUO
IPC分类号： H03J7/02 , H03D3/00 , H03D3/04 , H03D3/06 , H03D3/20 , H03D7/00 , H03J7/08 , H03L7/02 , H04B1/10 , H04B1/14 , H04B1/26
CPC分类号： H03D3/04 , H03D3/00 , H03D3/20 , H03D2200/0009 , H03D2200/0033 , H03D2200/0082 , H03J7/08 , H04B1/14 , H04B1/26

70. 发明专利

JPS56126313A INTERMEDIATE FREQUENCY CONTROL METHOD FOR FM RECEIVER 失效
公开(公告)号：JPS56126313A
公开(公告)日：1981-10-03
申请号：JP2987880
申请日：1980-03-10
申请人： KENWOOD CORP
发明人： KANEDA RIYOUICHI
IPC分类号： H03J7/02 , H04B1/10 , H04B1/14 , H04B1/26
摘要： PURPOSE:To minimize the distortion at the intermediate frequency amplifying stage, by giving an FM modulation to a local oscillator with a sine wave having sufficiently high frequency and a reduced degree of distortion and then detecting the distortion of said sine wave after an intermediate frequency amplification and demodulation to control the local oscillation frequency. CONSTITUTION:The sine wave oscillator 8 produces a sine wave having a high frequency that is not contained in the broadcast signal with a reduction of distortion. An FM modulation is given via the above-mentioned sine wave and the adder 10 to the local oscillator 4 that can apply the control voltage to give a minute change of frequency, and the oscillating frequency is mixed 3 with the received electric wave to be amplified 5 in the form of an intermediate frequency. Furthermore the frequency of more than double said sine wave is extracted through a high-pass filter 11 and out of the democulated 6 signals to be turned into a DC through an AM wave detection 12 and then applied to the control circuit 14 after an A/D conversion 13. Then the local oscillation circuit control voltage set at the circuit 14 with the input supplied from the converter 13 to obtain the compensating voltage. This voltage receives a D/A conversion 9 to be applied to the local oscillator 4 via the adder 10. Then the distortion is reduced gradually for the oscillation frequency through a control.

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