公开(公告)号：JPH08125445A

公开(公告)日：1996-05-17

申请号：JP28287794

申请日：1994-10-21

Applicant: ADVANTEST CORP

Inventor： UEKI YUTAKA

IPC: H03D1/18 ,  H04L27/06

Abstract: PURPOSE: To realize an excellent full wave rectifier circuit for high frequency in which production of a detection conversion error due to a phase lag of the detection circuit or the like caused by a high frequency is reduced. CONSTITUTION: This detection circuit is provided with a differential amplifier circuit 12 receiving an AC input signal 100, having transistors(TRs) Q1, Q2, a current balancing resistor R55, and a constant current source 40, supplying a corresponding inverted current output to a 1st current mirror circuit 16 and supplying a noninverting current output to a 2nd current mirror circuit 18, with the 1st current mirror circuit 16 having TRs Q3, Q6, a resistor R51 to form a current mirror and to output a half-wave rectifier current and with the 2nd current mirror circuit 18 having TRs Q4, Q5, and resistors R52, R53 to form a current mirror and to output a half-wave rectifier current. Thus, output currents from both collectors of the TRs Q6, Q5 are synthesized to output a full mirror current iQ65 being a full-wave rectifier current.

公开(公告)号：JP2008064467A

公开(公告)日：2008-03-21

申请号：JP2006239337

申请日：2006-09-04

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

Inventor： UEKI YUTAKA

IPC: G01R31/3183

Abstract: PROBLEM TO BE SOLVED: To reduce time lags of operations and output signals among a plurality of circuit units.
SOLUTION: A signal generating apparatus is provided with the plurality of circuit units which each operate in the case where a prescribed reference signal is received; a branch part for receiving a reference signal generated by a master circuit unit among the plurality of circuit units and outputting it; and a reference signal distributing part for inputting a reference signal outputted from the branch part to the plurality of circuit units including the master circuit unit via transmission paths having approximately equal line lengths.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：减少多个电路单元之间的操作和输出信号的时间滞后。 解决方案：信号发生装置具有多个电路单元，每个电路单元在接收到规定的参考信号的情况下操作; 分支部分，用于接收由多个电路单元中的主电路单元产生的参考信号并将其输出; 以及参考信号分配部件，用于经由具有大致相等的线路长度的传输路径将从分支部分输出的参考信号输入到包括主电路单元的多个电路单元。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2005101754A

公开(公告)日：2005-04-14

申请号：JP2003330335

申请日：2003-09-22

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

Inventor： KURITA HIROYUKI ,  UEKI YUTAKA ,  HANAI HIDEYUKI

IPC: H04L12/28 ,  H04B17/00

Abstract: PROBLEM TO BE SOLVED: To provide a transmitter characteristic measurement apparatus for reducing a measurement time of a transmitter 20 more in comparison with the case of transmitting one kind each of measurement data by means of packets from the transmitter 20.
SOLUTION: The transmitter characteristic measurement apparatus 10 for measuring a characteristic of the transmitter 20 for transmitting a return packet with the same payload as that of a received packet includes: a packet transmission section 12 for transmitting a transmission packet with a plurality of kinds of measurement data; a packet reception section 14 for receiving the return packet transmitted from the transmitter 20 which receives the transmission packet as the received packet; and a characteristic measurement section 16 for measuring the characteristic of the transmitter 20 on the basis of the return packet received by the packet reception section 14. Thus, the reply packet transmitted from the transmitter 20 includes the plurality of measurement data.
COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：与通过来自发射机20的分组发送各种测量数据的情况相比，提供一种用于减少发射机20的测量时间的发射机特性测量装置。 解决方案：用于测量用于发送具有与接收分组相同的有效载荷的返回分组的发送机20的特性的发送机特性测量装置10包括：分组发送部分12，用于发送具有多种测量的发送分组 数据; 一个分组接收部分14，用于接收从接收发送分组的发射机20发送的返回分组作为接收分组; 以及用于基于由分组接收部分14接收的返回分组来测量发射机20的特性的特性测量部分16.因此，从发射机20发送的应答分组包括多个测量数据。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2003283470A

公开(公告)日：2003-10-03

申请号：JP2002077835

申请日：2002-03-20

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

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

IPC: H04L1/00 ,  H04L12/28 ,  H04L12/70 ,  H04L29/14 ,  H04W24/00 ,  H04W24/08 ,  H04W84/10 ,  H04W84/12 ,  H04W88/02 ,  H04L12/56

Abstract: PROBLEM TO BE SOLVED: To provide a communication state measurement apparatus for measuring the communication state so as to easily discriminate the packet type that is optimum to the communication.
SOLUTION: An error rate calculation section 18 calculates the error rate obtained by dividing the number of packets wherein errors take place by the number of received packets by each packet type. An error rate display section 22 displays the error rates by each packet type. Then it is easy to discriminate of the packet type suitable for the communication by a communication apparatus.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种用于测量通信状态的通信状态测量装置，以便容易地识别对通信最佳的分组类型。 解决方案：错误率计算部分18计算通过将发生错误的分组数除以每个分组类型的接收分组数而获得的错误率。 错误率显示部分22按每个分组类型显示错误率。 然后，可以容易地区分适合于通信设备的通信的分组类型。 版权所有（C）2004，JPO

公开(公告)号：JP2003283444A

公开(公告)日：2003-10-03

申请号：JP2002085373

申请日：2002-03-26

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

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

IPC: H04L12/28 ,  H04B1/713 ,  H04B17/00 ,  H04L29/14 ,  H04W24/00 ,  H04W24/08 ,  H04W84/10 ,  H04W84/12 ,  H04W88/02

Abstract: PROBLEM TO BE SOLVED: To measure the incidence frequency of signal in all channels in Bluetooth communication.
SOLUTION: A communication log recording section 16 records a frequency and a reception time in use. An incidence measurement section 18 measures the number of times when the frequency (channel) is in use in communication. Then the frequency of incidence in signals in all the channels can be measured.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：测量蓝牙通信中所有通道中信号的入射频率。 解决方案：通信记录记录部分16记录使用中的频率和接收时间。 入射测量部分18测量频率（通道）在通信中使用的次数。 然后可以测量所有通道中信号的入射频率。 版权所有（C）2004，JPO

公开(公告)号：JP2003283443A

公开(公告)日：2003-10-03

申请号：JP2002085354

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: H04B17/00 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To measure and display the power of signals in all channels. SOLUTION: A transmission frequency, detection section 22 measures the frequency of a transmission signal and a transmission power measurement section 24 measures the power of the transmission signal. Then the power of the transmission signal of all channels (frequencies) can be measured. Since a transmission power display section 26 displays them, the power of the transmission signal of all the channels (frequencies) is easily obtained. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：测量和显示所有通道中的信号功率。 解决方案：发送频率，检测部分22测量发送信号的频率，发送功率测量部分24测量发送信号的功率。 那么可以测量所有通道（频率）的传输信号的功率。 由于发送功率显示部分26显示它们，因此容易获得所有信道（频率）的发送信号的功率。 版权所有（C）2004，JPO

公开(公告)号：JPH077366A

公开(公告)日：1995-01-10

申请号：JP17269393

申请日：1993-06-18

Applicant: ADVANTEST CORP

Inventor： UEKI YUTAKA

IPC: H03H9/54 ,  H04B1/26

Abstract: PURPOSE:To maintain an output level, a band width characteristic and passing band width, which follow a temperature variation so as to be constant by controlling a tuning frequency of the crystal filter by reading out correction data from a temperature correction table derived in advance in accordance with an ambient temperature. CONSTITUTION:Set values of the corresponding D/A converters 13, 23 extending over all working temperatures at every crystal filter and written in a temperature correction table 20. A deviation of a tuning frequency of each crystal filter 14, 24, which follows a variation of an ambient temperature is corrected by a control voltage applied to variable capacity diodes 12, 22. This control voltage is supplied from the D/A converters 13, 23, and a correction value corresponding to the ambient temperature is read out of the table 20 and set. A correction temperature is inputted from a temperature sensor 18 and used as a temperature parameter at the time of referring to the temperature correction table 20 by a control part 19. Fine adjustment of the tuning frequency of the filter 14 is executed by varying a series capacity value of the variable capacity diode 12 connected to the filter 14.

公开(公告)号：JPH05209907A

公开(公告)日：1993-08-20

申请号：JP1441792

申请日：1992-01-30

Applicant: ADVANTEST CORP

Inventor： KATO KAZUO ,  UEKI YUTAKA

IPC: G01R23/173

Abstract: PURPOSE:To prevent a floor noise from being superimposed on a display spectrum waveform of an input RF signal. CONSTITUTION:Data for one screen in an output of an A/D converter 10 of a floor noise that a measurement system has when an input RF signal is not put in (spectrum N0 to Nn in f0 to fn) is written in a sub memory 21. Also, display data for one screen of an A/D converted output that the floor noise is superimposed on the spectrum of the input RF signal (E0 to En) is written in a sub memory 22. A control/calculation circuit 12' reads respective data, calculates a spectrum S1=(E i-N i) (i=0 to n) only for the input RF signal that the floor noise is not superimposed, writes the calculated value in a main memory 11, reads out the written data and has it display on a display 14.

公开(公告)号：JPH10261929A

公开(公告)日：1998-09-29

申请号：JP6645297

申请日：1997-03-19

Applicant: ADVANTEST CORP

Inventor： UEKI YUTAKA

IPC: G01R23/16 ,  H03G11/00 ,  H03G11/08

Abstract: PROBLEM TO BE SOLVED: To improve the high frequency band output characteristic by making an amplitude limiting amplifier circuit and an unmagnified amplifier circuit to be independent, and supplying the output voltage of the amplitude limiting amplifier from one end of a load resistance and adding the current signal of the unmagnification amplifier from the other end. SOLUTION: The amplitude limiting amplifier 10 is a general differential amplifier operating independently and it receives an input signal Vi, amplifies it by prescribed number of times and supplies an amplitude-limited output voltage V11 to a load resistance Re3 for addition. An unmagnified amplifier 20 is an independent single-fold amplifier. An emitter resistance Re5 and a collector-side load resistance Re3 have almost equal resistance values. It converts the input signal Vi into a current signal Ie5 by receiving it at the base of a transistor Q5. An addition part adds the output voltage signal of the amplitude limiting amplifier 10 and the current signal Ie5 of the unmagnified amplifier 20 with a load resistance Re3 and outputs the result through a buffer circuit by a transistor Q4 and a resistance Re4. Thus, a logarithmic amplifier with a satisfactorily high band characteristic can be constructed by using the device.

公开(公告)号：JPH04118564A

公开(公告)日：1992-04-20

申请号：JP23968290

申请日：1990-09-10

Applicant: ADVANTEST CORP

Inventor： UEKI YUTAKA

IPC: G01R29/08

Abstract: PURPOSE:To simplify circuit constitution by providing a step amplifier, able to switch a gain, on the front stage of an amplitude detector, and a step attenuator, able to switch an attenuation quantity, and a comparator on the rear stage. CONSTITUTION:The gain of a step amplifier 130 is controlled to a condition having larger than 1 of a gain in a condition where the voltage of the detection output signal of an amplitude detector 121 is less than standard voltage EV, and at that time, a step attenuator 131 is switched to a condition where an attenuation quantity same as the gain of the step amplifier 130 is given. In a condition where the voltage of the detection output signal of the amplitude detector 121 is more than the standard voltage EV, the gain of the step amplifier 130 is controlled to a condition having a value near to 1 with a comparator 126, and the step attenuator 131 is controlled to a condition having an attenuation quantity of zero. By this constitution, the dynamic range of the amplitude detector 121 can be expanded and moreover the amplitude detector 121 can be made one, and circuit constitution can be simplified.