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1. 发明专利

JP2009118258A Voltage-current conversion circuit 审中-公开
标题翻译：电流转换电路
公开(公告)号：JP2009118258A
公开(公告)日：2009-05-28
申请号：JP2007289942
申请日：2007-11-07
申请人： Toshiba Corp , 株式会社東芝
发明人： ARAI TADASHI , SAEGUSA SHIGETO
IPC分类号： H03F3/34 , H03D7/14 , H03F1/32
摘要： PROBLEM TO BE SOLVED: To provide a voltage-current conversion circuit that can conduct voltage and current conversion having low distortions.
SOLUTION: This voltage-current conversion circuit 30 is provided with a bias circuit 1, a capacitor C1, a capacitor C2, NPN transistors NT1-4 and impedance elements Z1-5. In the NPN transistor NT1, RF input voltage Vin(+) is inputted to the base, and in the NPN transistor NT2, RF input voltage Vin(-) which is opposite in phase to that of the RF input voltage Vin(+) is inputted to the base (a control terminal). The impedance element Z1 is connected at one end to the base of the NPN transistor NT1. The impedance element Z2 is connected at one end to the base of the NPN transistor NT2, and the other end is connected to the other end of the impedance element Z1. Voltage is supplied from the bias circuit 1 to the other end of the impedance elements Z1 and Z2, and a differential voltage, substantially equal to {Vin(+)-Vin(-)}, is impressed on both ends of the impedance element Z3 and the impedance element Z4.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供能够进行具有低失真的电压和电流转换的电压 - 电流转换电路。解决方案：该电压 - 电流转换电路30设置有偏置电路1，电容器C1，电容器C2，NPN晶体管NT1-4和阻抗元件Z1-5。在NPN晶体管NT1中，RF输入电压Vin（+）输入到基极，在NPN晶体管NT2中，与RF输入电压Vin（+）相反的RF输入电压Vin（ - ）为输入到基座（控制端子）。阻抗元件Z1的一端连接到NPN晶体管NT1的基极。阻抗元件Z2的一端连接到NPN晶体管NT2的基极，另一端连接到阻抗元件Z1的另一端。电压从偏置电路1提供给阻抗元件Z1和Z2的另一端，并且基本上等于äVin（+） - Vin（ - ）}的差分电压施加在阻抗元件Z3的两端，并且阻抗元件Z4。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2005086316A Differential circuit and transconductor employing same 有权
标题翻译：差分电路和使用相同的晶体管
公开(公告)号：JP2005086316A
公开(公告)日：2005-03-31
申请号：JP2003313845
申请日：2003-09-05
申请人： Toshiba Corp , 株式会社東芝
发明人： ITO RUI , ARAI TADASHI
IPC分类号： H03F3/45 , H03F3/68 , H03G3/10
摘要： PROBLEM TO BE SOLVED: To provide a differential circuit capable of optionally and independently setting a band and stability required for differential components in a differential operation while setting a band and stability required for in-phase components in an in-phase operation.
SOLUTION: The differential circuit comprises: a first voltage current converter (Gm1) for receiving outputs of first and second amplifiers (A1, A2) for amplifying an input signal; first and second impedance elements (R1, R2) connected in series between outputs of the first voltage current converter; an in-phase signal detector (CM) for detecting the in-phase signal components from the outputs of the first and second amplifiers; second and third voltage current converters (Gm2, Gm3) for applying voltage current conversion to an output of the in-phase signal detector; a first phase compensator (PC1) connected between the output of the first voltage current converter and the output of the first amplifier and a second phase compensator (PC2) connected between the output of the first voltage current converter and the output of the second amplifier; and a third phase compensator (PC3) connected between an output of the in-phase signal detector and the first and second impedance elements.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种差分电路，其可以在同步操作中设置同步分量所需的频带和稳定性的同时，在差分操作中可选地独立地设置差分组件所需的频带和稳定性。解决方案：差分电路包括：第一电压电流转换器（Gm1），用于接收用于放大输入信号的第一和第二放大器（A1，A2）的输出; 第一和第二阻抗元件（R1，R2）串联连接在第一电压电流转换器的输出之间; 用于从第一和第二放大器的输出检测同相信号分量的同相信号检测器（CM）; 第二和第三电压电流转换器（Gm2，Gm3），用于向同相信号检测器的输出施加电压电流转换; 连接在第一电压电流转换器的输出和第一放大器的输出端之间的第一相位补偿器（PC1）和连接在第一电压电流转换器的输出端和第二放大器的输出端之间的第二相位补偿器（PC2）以及连接在同相信号检测器的输出端和第一和第二阻抗元件之间的第三相位补偿器（PC3）。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2008283249A Transconductor 审中-公开
标题翻译：跨
公开(公告)号：JP2008283249A
公开(公告)日：2008-11-20
申请号：JP2007123179
申请日：2007-05-08
申请人： Toshiba Corp , 株式会社東芝
发明人： SAEGUSA SHIGETO , ARAI TADASHI
IPC分类号： H03F3/34 , H03F1/48
摘要： PROBLEM TO BE SOLVED: To provide a transconductor with a phase compensator which does not impair a gain in a high-frequency band.
SOLUTION: The transconductor includes: an amplifier A1 which inputs a first input signal at an input terminal Vin+; an amplifier A2 which inputs a second input signal at an input terminal Vin-; a voltage-current converter Gm1 which inputs outputs of the amplifiers A1 and A2; a resistance R1 connected between output terminals of the voltage-current converter Gm1; an in-phase signal detector CM which detects an in-phase signal from the output of the amplifier A1 and the output of the amplifier A2; voltage-current converters Gm2 and Gm3 which input the output of the in-phase signal detector CM and output a current to the voltage-current converter Gm1; a phase compensator PC1 connected between the output end of the in-phase signal detector CM and the output of the amplifier A1; a phase compensator PC2 connected between the output terminal of the in-phase signal detector CM and the output terminal of the amplifier A2; and a fourth voltage-current converter Gm4 which inputs the output of the amplifier A1 and the output of the amplifier A2.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种不损害高频带增益的相位补偿器的跨导体。解决方案：跨导体包括：在输入端Vin +处输入第一输入信号的放大器A1; 放大器A2，其在输入端Vin-处输入第二输入信号; 输入放大器A1和A2的输出的电压 - 电流转换器Gm1; 连接在电压 - 电流转换器Gm1的输出端子之间的电阻R1; 同相信号检测器CM，其检测来自放大器A1的输出和放大器A2的输出的同相信号; 电压 - 电流转换器Gm2和Gm3，其输入同相信号检测器CM的输出，并将电流输出到电压 - 电流转换器Gm1; 连接在同相信号检测器CM的输出端和放大器A1的输出端之间的相位补偿器PC1; 相位补偿器PC2，其连接在同相信号检测器CM的输出端子和放大器A2的输出端子之间; 以及输入放大器A1的输出和放大器A2的输出的第四电压 - 电流转换器Gm4。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2002185275A VARIABLE GAIN AMPLIFIER 审中-公开
公开(公告)号：JP2002185275A
公开(公告)日：2002-06-28
申请号：JP2001262666
申请日：2001-08-31
申请人： TOSHIBA CORP
发明人： UENO TAKASHI , ARAI TADASHI , YAMAJI TAKAFUMI , YOSHIDA HIROSHI , ITAKURA TETSURO
IPC分类号： H03G3/12 , H03F3/45 , H03G3/18 , H03G3/30
摘要： PROBLEM TO BE SOLVED: To provide a variable gain amplifier having an offset removing circuit and capable of cancelling an offset favorably by removing offset fluctuation at a gain change. SOLUTION: The amplifier comprises a gain-variable main amplifier circuit (11) for amplifying the difference signal between an input signal and a feedback signal, a gain-variable feedback amplifying circuit (12) for amplifying an output signal from the main amplifying circuit to generate the feed back signal, and a gain control circuit (13) for changing a gain of the main amplifying circuit and complementarily changing a gain from the feedback amplifying circuit.

5. 发明专利

JPH0690127A LOGARITHMIC CONVERSION CIRCUIT 失效
公开(公告)号：JPH0690127A
公开(公告)日：1994-03-29
申请号：JP20548692
申请日：1992-07-31
申请人： TOSHIBA CORP
发明人： KOYAMA MIKIO , ARAI TADASHI
IPC分类号： H03G11/08 , G06G7/24
摘要： PURPOSE:To provide the logarithmic conversion circuit enlarging the operational range of low energy consumption by supplying current from both of 1st and 2nd transistors Tr and 3rd and 4th Tr to an impedance element and performing logarithmic conversion with the 3rd and 4th Tr. CONSTITUTION:The collector current of 1st and 2nd Tr Q1 and Q2 is turned to a current value beta-fold (beta is an amplification factor) as large as a base current IB when it is observed from the base current IB of the Tr Q1 and Q2. This current is fed back to the bases of Tr Q3 and Q4 and further amplified beta-fold, and the input current IB is amplified to beta*beta-fold. Namely, the current flow from both of the Tr Q1 and Q2 and the Tr Q3 and Q4 to an impedance element RE, and the logarithmic conversion is performed by the Tr Q3 and Q4. With the current amplifying functions of these Tr Q3 and Q4, the transconductance of the entire circuit can be enlarged. Thus, the logarithmic conversion is enabled over the wide voltage amplitude range of an input signal Vin without increasing an operating current, namely, without increasing current consumption.

6. 发明专利

JP2003174340A VARIABLE-GAIN AMPLIFIER 审中-公开
公开(公告)号：JP2003174340A
公开(公告)日：2003-06-20
申请号：JP2002218403
申请日：2002-07-26
申请人： TOSHIBA CORP
发明人： UENO TAKASHI , ARAI TADASHI , ITAKURA TETSURO
IPC分类号： H03F3/34 , H03G3/12
摘要： PROBLEM TO BE SOLVED: To solve the problem that the gain change of a variable-gain amplifier with an offset remover circuit causes the signal pass-band width to vary in a low frequency range to result in the deterioration of the signal quality at a high gain. SOLUTION: The variable-gain amplifier comprises a variable-gain main amplifier circuit (11) for amplifying a difference signal between an input signal and a feedback signal, a feedback circuit (12) for outputting a feedback signal having only a specified low frequency component among frequency components of an output signal from the main amplifier circuit, and a means (13) for so controlling as to lower the cutoff frequency of the feedback circuit against the raise of the gain of the main amplifier circuit. COPYRIGHT: (C)2003,JPO

7. 发明专利

JPH10209812A ALL PASS FILTER CIRCUIT DEVICE 失效
公开(公告)号：JPH10209812A
公开(公告)日：1998-08-07
申请号：JP876997
申请日：1997-01-21
申请人： TOSHIBA CORP
发明人： ARAI TADASHI
IPC分类号： H03H11/18
摘要： PROBLEM TO BE SOLVED: To improve phase characteristics even when driving capability at an input side is low, and to realize characteristic improvement and low power consumption by detecting currents flowing to a capacity at an input side by an input current compensating circuit, generating anti-phase currents for offsetting this, and adding it to the input side. SOLUTION: This device is provided with an all pass filter circuit 32 equipped with a voltage control current source circuit and a capacity and an input current compensating circuit 31, and the input terminal of the input current compensating circuit 31 is connected with outside input terminals 1 and 2 for inputting an input voltage. Then, input currents ID+ and ID-to the all pass filter circuit 32 are detected from the output side of the capacitor serially connected between the input terminal and output terminal of the voltage control current source circuit included in the all pass filter circuit 32, and the input current compensating circuit 31 generates anti-phase currents for offsetting the detected input currents, and inputs and adds the anti-phase input currents to the input terminal of the all pass filter circuit 32.

8. 发明专利

JPH07263984A VOLTAGE CONTROLLED CURRENT SOURCE CIRCUIT 失效
公开(公告)号：JPH07263984A
公开(公告)日：1995-10-13
申请号：JP4692994
申请日：1994-03-17
申请人： TOSHIBA CORP
发明人： ARAI TADASHI
IPC分类号： H03G3/00 , H03G3/02
摘要： PURPOSE:To improve high frequency characteristics by connecting one terminal of an impedance element to the inverted input terminal of first voltage/current converting circuit and the non-inverted output terminal of a third current/voltage converting circuit and connecting the other terminal to the inverted input terminal of a second voltage/current converting circuit and the inverted output terminal of the third current/ voltage converter. CONSTITUTION:An error current I1 flows from a (-) input terminal side to a (+) output terminal side at a parasitic capacitor 112 of a current/voltage converting circuit 103, and an error current I2 flows from a (+) input terminal side to a (-) output terminal side at a parasitic capacitor 115 of a current/voltage converting circuit 105. Further, an error current 13 flows from the (+) output terminal side to the (-) input terminal side at a parasitic capacitor 113 of a current/voltage converting circuit 104. In this case, since it can be regarded that the absolute values of respective error currents I3-I4 are almost equal, the error currents I1 and I2 are canceled at a contact B and the error currents I3 and I4 are canceled at a contact D. Thus, the error current inside the voltage controlled current source circuit can be practically turned to zero, and high frequency characteristics can be improved. Then, just the connection relationship is changed and the circuit scale is not changed.

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