公开(公告)号：EP0547228A4

公开(公告)日：1994-07-13

申请号：EP92910579

申请日：1992-05-26

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI ,  KATOH KAZUO ,  UEKI YUTAKA ,  HIRAKOSO YOHEI ,  SATOH MITSUNORI ,  KOSUGE TAKASHI

IPC: G01R19/00 ,  G01R29/08 ,  G01R29/26

CPC classification number: G01R19/003 ,  G01R29/0892 ,  G01R29/26

公开(公告)号：DE112008002111T5

公开(公告)日：2010-07-08

申请号：DE112008002111

申请日：2008-08-12

Applicant: ADVANTEST CORP

Inventor： OSUMI TARO ,  UEKI YUTAKA

IPC: G01R27/28 ,  G01R35/00

公开(公告)号：DE69228232T2

公开(公告)日：1999-07-08

申请号：DE69228232

申请日：1992-05-26

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI ,  KATOH KAZUO ,  UEKI YUTAKA ,  HIRAKOSO YOHEI ,  SATOH MITSUNORI ,  KOSUGE TAKASHI

IPC: G01R19/00 ,  G01R29/08 ,  G01R29/26

Abstract: An apparatus for measuring the intensity of an interfering electromagnetic wave, specifically for measuring the average value of impulsive noises in a short time accurately. In the apparatus, impulsive noises, inputted through a variable attenuator (12), a frequency converter (13), an intermediate-frequency amplifier (15), a band-pass filter (16) of 9 KHz or 120 KHz are inputted into a linear detector (17). The detected outputs are passed through a low-pass CR filter (31) whose cut-off frequency is tens of thousands of hertz to lower their peak values and to widen their width. The output of the filter is converted into digital signal by an A/D converter (33), and digital values at respective sampling points in one frame of the digital signals are summed by a computing circuit (34). Then, the summation value thereof is divided by the number of samples to obtain the average value and the result is displayed.

公开(公告)号：DE69228232D1

公开(公告)日：1999-03-04

申请号：DE69228232

申请日：1992-05-26

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI ,  KATOH KAZUO ,  UEKI YUTAKA ,  HIRAKOSO YOHEI ,  SATOH MITSUNORI ,  KOSUGE TAKASHI

IPC: G01R19/00 ,  G01R29/08 ,  G01R29/26

Abstract: An apparatus for measuring the intensity of an interfering electromagnetic wave, specifically for measuring the average value of impulsive noises in a short time accurately. In the apparatus, impulsive noises, inputted through a variable attenuator (12), a frequency converter (13), an intermediate-frequency amplifier (15), a band-pass filter (16) of 9 KHz or 120 KHz are inputted into a linear detector (17). The detected outputs are passed through a low-pass CR filter (31) whose cut-off frequency is tens of thousands of hertz to lower their peak values and to widen their width. The output of the filter is converted into digital signal by an A/D converter (33), and digital values at respective sampling points in one frame of the digital signals are summed by a computing circuit (34). Then, the summation value thereof is divided by the number of samples to obtain the average value and the result is displayed.

公开(公告)号：JPH11341812A

公开(公告)日：1999-12-10

申请号：JP13959398

申请日：1998-05-21

Applicant: ADVANTEST CORP

Inventor： UEKI YUTAKA

IPC: H02M7/21 ,  H03B19/14

Abstract: PROBLEM TO BE SOLVED: To obtain a full-wave rectifier circuit which requires no power transistor or rectifier diode. SOLUTION: The emitters of transistor Q1 and Q2 are connected to a common constant-current source PI and the bases of the transistors Q1 and Q2 are connected to a common potential point via resistors R1 and R2 . The collector of the transistor Q1 is connected to a voltage source successively via the collector and emitter of a transistor Q3 short-circuited to each other and a resistor R3 . The emitters of transistors Q4 and Q5 are connected to the voltage source via a common resistor R4 and the collectors of the transistors Q4 and Q4 are connected to the common potential point through a common resistor R5 . The collector of the transistor Q2 is connected to the voltage source successively via the collector and emitter of a transistor Q6 the collector and emitter, of which are short-circuited to each other and a resistor R6 . The bases of the transistors Q3 and Q4 are respectively connected to those of the transistors Q5 and Q6 . By impressing the input AC voltage upon the base of the transistor Q1 , a full-wave rectified output voltage is obtained across both ends of the resistor R5 . By having the output voltage applied to a BPF and a signal which has a frequency which is twice as high as that of the input voltage is selected, a frequency multiplying circuit is obtained.

公开(公告)号：JPH05188100A

公开(公告)日：1993-07-27

申请号：JP430492

申请日：1992-01-14

Applicant: ADVANTEST CORP

Inventor： KATO KAZUO ,  UEKI YUTAKA

IPC: G01R23/16 ,  G01R23/167

Abstract: PURPOSE:To obtain information close to the information obtained in the case of displaying without storing detection output. CONSTITUTION:Fixed cycle pulses are generated from a saw-tooth-wave control part 15, and a saw-tooth-wave signal raised one step by the pulse is generated from a generator 16. The oscillation frequency of a local oscillator 13 is controlled by this saw-tooth-wave signal, so that the frequency of input signals taken in by a frequency converter 11 is swept, and the output of a frequency converter 12 is detected. The pulses from the saw-tooth-wave control part 15 are also supplied to a plural pulse generator 26. During one cycle of each one of these pulses, twenty pulses are generated at equal intervals. With each pulse, the detection output is converted into a digital signal in an AD converter 21. These digital signals are temporarily stored in a time axis memory 27, and two levels are stored in a frame memory 22, in the order of high frequency in the generation level every frequency sweeping step by a control processing part 14. The stored content of the frame memory 22 is then displayed on a display 19, in the display mode of continuous lines and dotted lines, for instance.

公开(公告)号：JP2003283508A

公开(公告)日：2003-10-03

申请号：JP2002085981

申请日：2002-03-26

Applicant: Advantest Corp ,  株式会社アドバンテスト

Inventor： UEKI YUTAKA ,  KANAI SUSUMU ,  HANAI HIDEYUKI ,  KURITA HIROYUKI

IPC: H04L12/28 ,  H04B7/26 ,  H04W84/10 ,  H04W88/02 ,  H04Q7/34

Abstract: PROBLEM TO BE SOLVED: To know band power distribution. SOLUTION: In a communication state display device 1 for measuring and displaying a communication state by receiving a signal by performing a communication suited to the Bluetooth (R) standard with a communication device 2, a receiving part 10 receives the signal, a power measuring part 12 measures a signal power for each channel and a power display part 14 displays a display graphic 14a having a length corresponding to the signal power for each channel. Therefore, the band power distribution is easier to know than the case of displaying only the leak power of the adjacent channel. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：了解频带功率分配。 解决方案：在通信状态显示装置1中，用于通过用通信装置2执行适合于蓝牙标准的通信来接收信号来测量和显示通信状态，接收部分10接收该信号， 功率测量部分12测量每个通道的信号功率，并且功率显示部分14显示具有与每个通道的信号功率相对应的长度的显示图形14a。 因此，与仅显示相邻信道的泄漏功率的情况相比，频带功率分配更容易知道。 版权所有（C）2004，JPO

公开(公告)号：JP2003283445A

公开(公告)日：2003-10-03

申请号：JP2002085346

申请日：2002-03-26

Applicant: Advantest Corp ,  株式会社アドバンテスト

Inventor： KURITA HIROYUKI ,  KANAI SUSUMU ,  UEKI YUTAKA ,  HANAI HIDEYUKI

IPC: G01R23/173 ,  H04B1/713 ,  H04B17/00

Abstract: PROBLEM TO BE SOLVED: To sufficiently display information with respect to waveform quality of a frequency.
SOLUTION: A waveform quality information display section displays the waveform data 20a denoting the magnitude relation between a value taken by a waveform 18a and a prescribed threshold value f0 by using a time base in common for the waveform 18a. Then the magnitude relation between the frequency at a time and the threshold value f0 can easily be grasped and the display section sufficiently displays the information with respect to the waveform quality of the frequency.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：为了充分显示关于频率的波形质量的信息。 解决方案：波形质量信息显示部分通过使用波形18a的共同时基来显示表示由波形18a取得的值与规定的阈值f0之间的大小关系的波形数据20a。 然后，可以容易地掌握一次频率与阈值f0之间的大小关系，并且显示部分充分显示关于频率的波形质量的信息。 版权所有（C）2004，JPO

公开(公告)号：JP2003032148A

公开(公告)日：2003-01-31

申请号：JP2001216762

申请日：2001-07-17

Applicant: Advantest Corp ,  株式会社アドバンテスト

Inventor： UEKI YUTAKA

IPC: H04B1/713

Abstract: PROBLEM TO BE SOLVED: To provide a signal processor that converts a broadband reception signal into an intermediate signal so as to attain processing such as analog/ digital conversion.
SOLUTION: A processing object signal is a signal with any of frequencies F1, F2, F3, to Fn. A local signal is a set of signals with frequencies f1', f2', f3', to fn'. An analog/digital converter can apply analog/digital conversion to the signal with the frequency f1. The difference between the frequency (e.g. F3) of the processing object signal and any frequency (e.g. f3') of the local signals is f1. Thus, even when the band of the prescribed object signal extends over a broadband, the processing object signal is mixed with the local signal to obtain an intermediate frequency signal(IF signal) to allow the analog/digital converter to be capable of analog/digital conversion.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：提供一种信号处理器，其将宽带接收信号转换成中间信号，以便获得诸如模拟/数字转换的处理。 解决方案：处理对象信号是具有F1，F2，F3至Fn中任何一个的信号。 本地信号是具有频率f1'，f2'，f3'至fn'的一组信号。 模拟/数字转换器可以对频率为f1的信号进行模拟/数字转换。 处理对象信号的频率（例如F3）与本地信号的任何频率（例如f3'）之间的差为f1。 因此，即使当规定的对象信号的频带在宽带上延伸时，处理对象信号与本地信号混合，以获得中频信号（IF信号），以允许模/数转换器能够模拟/数字 转换。

公开(公告)号：JPH11340828A

公开(公告)日：1999-12-10

申请号：JP14400698

申请日：1998-05-26

Applicant: ADVANTEST CORP

Inventor： UEKI YUTAKA

IPC: H03B5/12 ,  H03L7/24

Abstract: PROBLEM TO BE SOLVED: To reduce cost by further decreasing the circuit scale more than that which employs PLL. SOLUTION: The reference signal generator consists of a rectifier circuit 10, that applies full wave rectification to a standard input signal Vin with a frequency fr and a synchronization oscillating circuit 20. The circuit 20 synchronously oscillates at a frequency 2fr with an output of the rectifier circuit 10 received at a control input terminal CTL and self-running- oscillated at a frequency closer to the frequency 2fr, when no standard input signal is fed to the rectifier circuit 10. A differential circuit, consisting of transistors(TRs) Q1 , Q2 or the like, is configured in the rectifier circuit 10, a current mirror consisting of TRs Q3 , Q4 is formed to a collector side of the TR Q1 and a current mirror consisting of TRs Q5 , Q6 is formed at the collector side of the TR Q2 . When an input signal Vin is switched to a signal of a positive half wave, a collector current of the TR Q1 increases and a collector current of the TR Q2 decreases, the TR Q4 is turned on and the TR Q5 is turned off, only the current mirror consisting of the TRs Q3 , Q4 operates normally, and a positive half wave is applied to a load R5 . When the Vin is a negative half wave, the collector current of the TR Q1 decreases and the collector current of the TR Q2 increases, the TR Q4 is turned off and the TR Q5 is turned on, only the current mirror consisting of the TRs Q5 , Q6 operates normally, and a positive half wave is applied to the load R5 .