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公开(公告)号：JPH0193914A
公开(公告)日：1989-04-12
申请号：JP25125087
申请日：1987-10-05
Applicant: ADVANTEST CORP
Inventor： YAMAGUCHI TAKAHIRO , NAKANISHI TORU , ARAKAWA NORIO , TAKANAGA YOSHIO
Abstract: PURPOSE:To solve problems of restrictions on the dynamic range of a frequency converter and the drift of a DC amplifier by performing digital processing in all of means following an AD converter. CONSTITUTION:An input signal is converted to a digital signal by an AD converter 23 and has the frequency converted in first and second digital frequency converting means 24 and 25 by sine and cosine wave local signals and is converted to complex data by orthogonal modulation. Respective outputs of the first and second digital frequency converting means 24 and 25 pass first and second digital filters 28 and 29 to take out digital signals in preliminarily determined frequency bands, and they are resampled by first and second resampling means 31 and 32 and are successively stored in a complex memory 33. Thus, problems of restrictions on the dynamic range of the frequency converter and the drift of the DC amplifier are resolved.
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公开(公告)号：JPS6345514A
公开(公告)日：1988-02-26
申请号：JP19008586
申请日：1986-08-13
Applicant: ADVANTEST CORP
Inventor： ARAKAWA NORIO , YAMAGUCHI TAKAHIRO , NIKI NAOHARU , WATANABE SHINICHI
Abstract: PURPOSE:To improve the resolution of a spectrum analyzer by finding a partial sum by multiplying part of a power spectrum by the 2nd window function. CONSTITUTION:A signal in some as data which is AD-converted by an AD converter 7 and inputted to a buffer memory 16 is read out by a microcomputer 17 and then multiplied by a hanning window by the 1st window function multiplying means 17A. Further, analytic data converted into the power spectrum is supplied to an extracting means 17C and part of the spectrum is multiplied by the 2nd window function to extract plural power spectrum groups while the 2nd window function is shifted in position successively from the spectrum; and the sum of the extracted power spectrum groups is calculated by an adding means 17D to calculate the partial product. This partial product is an interpolating value which interpolates respective frequency analytic components of the power spectrum, thereby improving the resolution.
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公开(公告)号：JPS633230A
公开(公告)日：1988-01-08
申请号：JP14667086
申请日：1986-06-23
Applicant: ADVANTEST CORP
Inventor： YAMAGUCHI TAKAHIRO , ENOMOTO KOJI , ARAKAWA NORIO , WATANABE SHINICHI , NIKI NAOHARU
IPC: G01J3/45
Abstract: PURPOSE:To perform correct Fourier transform processing by performing squaring arithmetic and adding arithmetic and finding a maximum value. CONSTITUTION:Interference light from an optical interferometer 21 is converted by a photodetector 15 into an electric signal, which is converted by an AD converter 24 into a digital signal. This is increased in magnification by a magnification varying circuit 25 and fetched in a buffer memory 33. At this time, a real and an imaginary part which are the outputs of switches 31 and 32 of the circuit 25 are squared by squaring devices 41 and 42. Their squared values are added together by an adder 43, and the maximum value of the addition result is detected by a maximum detector 44. Data at the point of time when the maximum value is obtained is regarded as a reference point of time and data required for the Fourier transform processing is fetched out of the memory 33 and processed by fast Fourier transformation. Thus, the result of the correct fast Fourier transformation which is maximum at the center point of time at any time and has a nearly symmetrical waveform is obtained.
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公开(公告)号：JP2012034208A
公开(公告)日：2012-02-16
申请号：JP2010172324
申请日：2010-07-30
Applicant: Advantest Corp , 株式会社アドバンテスト
Inventor： ARAKAWA NORIO , ENDO YUKI , YAMAMOTO KAZUNARI
Abstract: PROBLEM TO BE SOLVED: To suppress an increase of processing time for a plurality of instruction signals, while reducing a control circuit area occupying a control chip and reducing the number of output parts for outputting control signals.SOLUTION: A signal processor, which generates control signals for controlling circuits to be controlled which have a plurality of channels, comprises: a control chip for receiving an instruction signal for each of the circuits to be controlled at a common input part, generating a control signal according to the received instruction signal, and outputting the control signal for each of the circuits to be controlled from the common output part; and a distribution circuit for distributing each of the control signals, which are output by the control chip, to each corresponding circuit to be controlled.
Abstract translation: 解决的问题：为了抑制多个指令信号的处理时间的增加，同时减少占用控制芯片的控制电路区域并减少用于输出控制信号的输出部分的数量。 解决方案：一种信号处理器，其产生用于控制的控制电路的控制信号，该控制信号具有多个通道，包括：控制芯片，用于接收每个待控制在公共输入部分的电路的指令信号， 根据接收到的指令信号生成控制信号，并从公共输出部分输出要控制的每个电路的控制信号; 以及分配电路，用于将由控制芯片输出的每个控制信号分配给要控制的每个相应的电路。 版权所有（C）2012，JPO＆INPIT
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公开(公告)号：JP2011247783A
公开(公告)日：2011-12-08
申请号：JP2010122085
申请日：2010-05-27
Applicant: Advantest Corp , 株式会社アドバンテスト
Inventor： ENDO YUKI , ARAKAWA NORIO , YAMAMOTO KAZUNARI
IPC: G01R31/28
Abstract: PROBLEM TO BE SOLVED: To reduce a circuit scale of a testing device.SOLUTION: The testing device for testing a device to be tested includes a plurality of channels for transmitting and receiving signals to and from the device to be tested, and a signal processing circuit for processing a plurality of signals corresponding to the plurality of channels. The signal processing circuit includes an input selector for selecting the plurality of signals in a preliminarily determined channel order in time division, a processing part for outputting a signal corresponding to the signal selected by the input selector, a plurality of holding parts provided correspondingly to the plurality of channels to store signals, and an output selector for storing each signal outputted from the processing part into a holding part according with the preliminarily determined channel order, out of the plurality of holding parts.
Abstract translation: 要解决的问题：减少测试设备的电路规模。 用于测试要测试的设备的测试设备包括用于向被测设备发送和接收信号的多个通道，以及用于处理与多个测试对应的多个信号的信号处理电路 通道。 信号处理电路包括输入选择器，用于以时分方式以预定的信道顺序选择多个信号;处理部分，用于输出与由输入选择器选择的信号相对应的信号;多个保持部分， 多个通道来存储信号;以及输出选择器，用于在多个保持部分中存储根据预先确定的通道顺序将从处理部分输出的每个信号存储到保持部分中。 版权所有（C）2012，JPO＆INPIT
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Patent Agency Ranking
公开(公告)号：JP2001067579A
公开(公告)日：2001-03-16
申请号：JP23999199
申请日：1999-08-26
Applicant: ADVANTEST CORP
Inventor： UMETSU SATOSHI , MIYAJIMA ATSUSHI , YAMAGUCHI TAKAHIRO , ARAKAWA NORIO
Abstract: PROBLEM TO BE SOLVED: To easily or properly perform a measuring process. SOLUTION: A measuring instrument 100 has a program reception part 110 which receives a control program having contents prescribing a measuring process through a network 10, a storage part 120 which stores the control program, a start indication reception part 130 which receives an indication for starting the control program through the network 110, and a measurement control part 156 which makes a measurement part 160 perform the measuring process according to the control program stored in the storage part 120 when the start indication reception part 130 receives the execution start indication.
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公开(公告)号：JPH08248072A
公开(公告)日：1996-09-27
申请号：JP8078195
申请日：1995-03-13
Applicant: ADVANTEST CORP
Inventor： ARAKAWA NORIO
Abstract: PURPOSE: To suppress error in the calculation of resonance frequency by determining the linear relationship among the reactances of a complex impedance calculated from data measured with a plurality of frequencies thereby decreasing the number of measuring points. CONSTITUTION: Measurements at two frequencies are converted into complex impedances and a linear function passing both reactance points is calculated thus determining a resonance frequency f0 at a point where the linear function intersects the reactance value = 0. Measurement data is picked up at two points or more at a wide frequency interval 410. In case of two measuring points 402, 403, where the measuring points N=2, the line of reactance value = 0 exists between the points 402, 403. A crystal oscillator exhibits high linearity and a line 400 passing these two points is determined. The resonance frequency f0 is determined at a point where the line 400 intersects the line of reactance value = 0.
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公开(公告)号：JPH0225726A
公开(公告)日：1990-01-29
申请号：JP17681088
申请日：1988-07-15
Applicant: ADVANTEST CORP
Inventor： NIKI NAOHARU , ARAKAWA NORIO
Abstract: PURPOSE:To obtain an interference light containing phase information by constituting a variable optical path of a structure in which one of light beams which have been demultiplexed by an optical demultiplexer and multiplexer is allowed to pass through an inspecting body and the other is not allowed to pass through a body to be inspected and multiplexing both the light beams. CONSTITUTION:A white light 11 emitted from a white light source 10 is made incident directly on an optical interferometer 20, and also, by an optical demultiplexer and multiplexer 21, one of said light and the other are demultiplexed to a variable optical path 22 and a fixed optical path 23, respectively. One of this demultiplexed light is led to inspected body connecting parts 12, 13 provided on the fixed optical path 23 side, and by connecting a body to be inspected 15 thereto, a light beam which is passed through the body to be inspected and a light beam which is passed through the variable path 22 are multiplexed and allowed to interfere with each other, and by receiving them by a light receiving device 26, an optical interference signal is obtained. This optical interference signal is brought to frequency analysis, and from a real part and an imaginary part which are obtained, a phase characteristic and an amplitude characteristic of the body to be inspected are derived.
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公开(公告)号：JPS631940A
公开(公告)日：1988-01-06
申请号：JP14582786
申请日：1986-06-20
Applicant: ADVANTEST CORP
Inventor： ARAKAWA NORIO , YAMAGUCHI TAKAHIRO , NIKI NAOHARU , WATANABE SHINICHI
IPC: G01J9/02
Abstract: PURPOSE:To measure the coherence length of a wave to be measured, by a method wherein the timewise or spatial interference fringe resulting from the interference of the wave to be measured is converted to an electric signal, and the square value of AD conversion output and the square value of the Hilbert transform value of the AD conversion output are added while the added value is extracted. CONSTITUTION:The wave to be measured from a light source 11 is inputted to an interferometer 21 and the obtained timewise interference fringe is inputted to a light detector 16 to be converted to an electric signal. This electric signal is supplied to an AD converter 22 and the digital signal converted is directly taken in a buffer memory 25 corresponding to the setting of switches 23, 24 or taken in a memory 25 through a magnification altering means 26. The digital signal value of the interference fringe taken in the memory 25 is inputted to an operation part 27. The operation part 27 operates the square of the inputted digital signal and the square of the Hilbert transform value of the digital signal and both square values operated are added and the added value is further evoluted. Accurate envelope can be detected on the basis of the extraction value obtained and an accurate coherence length can be measured.
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公开(公告)号：JPS631939A
公开(公告)日：1988-01-06
申请号：JP14582886
申请日：1986-06-20
Applicant: ADVANTEST CORP
Inventor： YAMAGUCHI TAKAHIRO , ARAKAWA NORIO , NIKI NAOHARU , WATANABE SHINICHI
Abstract: PURPOSE:To process the envelope of the original signal of an input signal in a real time, by respectively mixing the frequencies of first and second carrier wave signals in orthogonal relation and the frequency of an input digital signal and adding the square values of respective difference frequency components and further extracting the square root of the added value. CONSTITUTION:The light from a light source 11 is incident to an interferometer 21 and interference light is converted to an electric signal by a light detector 16. This electric signal is inputted to a magnification altering means 23 through an AD converter 22. A digital signal is applied to frequency mixing means 24, 25 to be respectively multiplied by first and second carrier waves. The second carrier wave has the same frequency as the first carrier wave and holds orthogonal relation different by 90 deg. in a phase with respect to the first carrier wave. The difference frequency components in the frequency mixing result obtained from the means 24, 25 are respectively supplied to LPFs 26, 27 and the outputs thereof are taken out at the cycle corresponding to set magnification by switches 30a, 30b. These outputs are squared by square means 28, 29 and the squared values are added by an adding means 31. The added value is subjected to evolution operation by an extraction means 32 and accurate envelope can be detected on the basis of the extraction result.
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