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81. 发明专利

JPH0830723B2 失效
公开(公告)号：JPH0830723B2
公开(公告)日：1996-03-27
申请号：JP51558090
申请日：1990-10-12
申请人： TEII ESU AI INC
发明人： JENSON RESURII EMU
IPC分类号： G01R23/175 , G01P3/36 , G01R23/02 , G01S7/02 , G01S17/50 , G01S17/58 , G06F17/15

82. 发明专利

JPH04248471A FREQUENCY MEASURING DEVICE 失效
公开(公告)号：JPH04248471A
公开(公告)日：1992-09-03
申请号：JP3338291
申请日：1991-02-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： HAMADA YOSHIO
IPC分类号： G01R23/175 , H03D3/00
摘要： PURPOSE:To enable frequency to be measured even in a wide frequency range by providing an equalizer with certain frequency characteristics at a previous stage of a phase discrimination circuit and a detection circuit of a video amplitude data which is determined by frequency characteristics at a later stage and determing frequency from the data and I/Q video quantized output. CONSTITUTION:An RF signal passed through an equalizer 10 with certain frequency characteristics and is fed to an I/Q phase discrimination circuit 5. An output QA of an adder 11 can detect a video amplitude which is determined by frequency characteristics of the equalizer 10. The video amplitude signal is converted to a quantized amplitude data, thus enabling ranges A and B of frequency measurement to be determined. A polarity is judged by a frequency calculation circuit 13 according to this amplitude data and an I/Q video, is code-converted, and is outputted as a digital data, thus enabling an uncertainty of a frequency precise measurement system of the I/Q video system to be compensated for by a rough measurement system of the amplitude data system and obtaining a high resolution.

83. 发明专利

JPH0411827B2 失效
公开(公告)号：JPH0411827B2
公开(公告)日：1992-03-02
申请号：JP21606781
申请日：1981-12-28
申请人： ROCKWELL INTERNATIONAL CORP
发明人： SUTANRI AACHIBARUDO HOWAITO
IPC分类号： G01R23/16 , G01R23/10 , G01R23/175
摘要： Multiplexing means for allowing multi-octave processing of sampled data by means of a common single-octave data processor. Sampled data is preselectively delayed, corresponding to delay-coding-thereof, and multiplex switching means samples the progessively delayed delay-coded data at progressively reduced data sampling rates, corresponding to lower octaves of interest. In this way the several octaves of data are interleaved or time-multiplexed. Similar multiplexing within the single-octave data processor corresponds to frequency multiplexing of the time-multiplexed multi-octave date, whereby the single bandwidth limit processor may handle such multiple-octave data.

84. 发明专利

JPH01232271A SIMULTANEOUS DELAY CORRELATOR 失效
公开(公告)号：JPH01232271A
公开(公告)日：1989-09-18
申请号：JP33278588
申请日：1988-12-28
申请人： HUGHES AIRCRAFT CO
发明人： REYNOLDS SAMUEL C , CHANG DONALD C D
IPC分类号： G01R29/00 , G01R23/163 , G01R23/175 , H01P5/16
摘要： PURPOSE: To obtain a small and simple simultaneous delay correlation unit in which configuration and arrangement are facilitated by delaying two input signals simultaneously using a single transmission line and connecting two input signals with the opposite end parts of transmission line. CONSTITUTION: A single transmission line 17 is used for delaying a first and second input signals simultaneously. Circulators 19, 21 are arranged at the opposite end of the line 17 and one circulator 19 receives a first input signal transmitted on a line 23 and delivers the received signal in one direction while coupling the signals with the line. At the same time, the other circulator 21 receives a second input signal transmitted on a line 24 and delivers the received signal in the opposite direction while coupling the signal with the line. Each circulator 19, 21 is associated with an appropriate matching load terminal. A plurality of directional couplers 27a-27i are arranged at an interval along the line 17 and the output the delayed version of first and second input signals transmitted in the opposite directions along the line.

85. 发明专利

JPS61294376A CHIRP CONVERTER 失效
公开(公告)号：JPS61294376A
公开(公告)日：1986-12-25
申请号：JP13575785
申请日：1985-06-21
申请人： NEC CORP
发明人： UEDA ISAMU
IPC分类号： G06G7/19 , G01R23/175
摘要： PURPOSE:To simplify a device by making common use of a 90 deg. hybrid mixer and chirp signal generator for modulation and demodulation. CONSTITUTION:The 90 deg. hybride mixer 4 and the chirp signal generator 1 are commonly used for modulation and demodulation by changing over of switch circuits 2, 6, 10. Two input signals of I, Q are inputted to the mixers 3, 5 during the modulation operation. The input signals are modulated by the signal from the generator 1 in which the phase is divided to two components different from each other by 90 deg. and thereafter the signals are synthesized by the hybrid 8. The synthesized signal is inputted to DDL11. The switches 2, 6, 10 are changed over upon the completion of inputting so that the demodulation operation is started. More specifically, the output from the DDL11 is branched by the hybrid 8 and is inputted to the mixers 3, 5. The mixers 3, 5 demodulate the input signals with the same signal as in the modulation stage and output the signals to higher harmonic wave removing filters 7, 9.

86. 发明专利

JPS6120872B2 JPS6120872B2 - 失效
公开(公告)号：JPS6120872B2
公开(公告)日：1986-05-24
申请号：JP5303578
申请日：1978-05-02
申请人： Tokyo Shibaura Electric Co
发明人： NISHIGATA HIROYUKI , YAMAMOTO TAKASHI
IPC分类号： G01R13/20 , G01R13/22 , G01R23/02 , G01R23/175 , G01S7/22 , G09G1/12

87. 发明专利

JPS58155477A Z CONVERTER OF ACOUSTIC SURFACE WAVE CHIRP 失效
公开(公告)号：JPS58155477A
公开(公告)日：1983-09-16
申请号：JP3855882
申请日：1982-03-11
申请人： NIPPON ELECTRIC CO
发明人： KITANO TOSHIHIKO
IPC分类号： H03H9/64 , G01R23/175 , G06F17/14 , G06F17/15 , G06G7/19 , H03H3/08 , H03H9/44
摘要： PURPOSE:To make the in-band amplitude characteristic flat to improve the conversion precision, by using three acoustic surface wave dispersing delay lines different in delay characteristic to perform the Fourier transform of an input signal. CONSTITUTION:Pulses from an RF pulse generator 2 are applied to an acoustic surface wave dispersing delay line 1 having the characteristic, where the delay time is shortened linearly for the frequency, to obtain a chirp signal. A composite signal obtained by multiplying this chirp signal and a signal r(t) having an unknown frequency spectrum in a multiplexer 3 is applied to an acoustic surface wave dispersing delay line 4 having the Characteristic where the delay time is extended for the frequency. The output of this delay line 4 and a chirp signal obtained in an acoustic surface wave dispersing delay line 5 having the same characteristic as the delay line 1 are multiplied in a multiplexer 7 to obtain a Fourier transform signal of the signal r(t). In this case, the width and the carrier frequency of input pulses of the delay line 5 are controlled to eliminate the influence of the amplitude inclination of the delay line upon an output signal S(tau).

88. 发明专利

JPS5840701B2 失效
公开(公告)号：JPS5840701B2
公开(公告)日：1983-09-07
申请号：JP2326478
申请日：1978-02-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： OKADA TAKATO , ISHIKAWA SHINSUKE
IPC分类号： G01R23/175 , G01R23/16

89. 发明专利

JPS57207869A DIGITIZING INSTANTANEOUS FREQUENCY MEASURING DEVICE 失效
公开(公告)号：JPS57207869A
公开(公告)日：1982-12-20
申请号：JP9427581
申请日：1981-06-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： MINAMI NAOYUKI
IPC分类号： G01R23/175 , G01R23/02
摘要： PURPOSE:To use an I/Q phase discriminating circuit in common, to make a device small-sized, and also to elevate a frequency measuring accuracy, by switching and selecting plural delay signal whose delay time is different from each other, and inputting its selected signal to one I/Q phase discriminating circuit. CONSTITUTION:An inputted high frequency signal is distributed in phase, one input signal 15 is inputted to an I/Q phase discriminating circuit 6, and the other input signal is delayed by delaying circuits 5a-5c, respectively, and becomes delay signals 16a-16c, respectively. A switching circuit 41 switches the signals 16a-16c by a control signal generated by a timing pulse generation controlling circuit 42, in accordance with an arrival time of the input signal, and a delay signal 16 is is obtained. When this signal 16 is inputted to the I/Q phase discriminating circuit 6 and phase synthesis is executed between this signal and said non-delay signal 15, I and Q video outputs whose 1 period becomes 1/gamma, 1/2gamma-1/ngamma against input carrier frequency at every changeover of the switch are obtained.

90. 发明专利

JPS54115280A SPECTRUM ANALYZER 失效
公开(公告)号：JPS54115280A
公开(公告)日：1979-09-07
申请号：JP2326478
申请日：1978-02-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： OKADA TAKUTO , ISHIKAWA SHINSUKE
IPC分类号： G01R23/175 , G01R23/16
摘要： PURPOSE:To expand the analyzable range by controlling the amplitude of input signal. CONSTITUTION:An amplitude limiter or a logarithmic amplifier 10 is disposed between IF filter 4 and a chirp filter 5. As a result, the observation signal to be analyzed which is inputted into an input terminal is mixed with the output from a sweep oscillator 3 in a mixer 2, and unwanted waves are removed by the IF filter 4. Then, the amplitude is controlled to the dynamic range (amplitude) determined by the side lobe level of the chirp filter 5 by the amplitude limiter or logarithmic amplifier 10, and the signal is inputted into the chirp filter 5 and is outputted from an output terminal 6. Therefore, small signals in the vicinity of large signals may be analyzed, and the analyzable range of spectrum analysis may be expanded. Hence, the manufacturing precision of the sweep oscillator 3 and chirp filter 5 may be alleviated.

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