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1.发明申请公开(公告)号：US20080055005A1
公开(公告)日：2008-03-06
申请号：US11753739
申请日：2007-05-25
申请人： Il-Ku NAM , Young-Jin Kim , Hyun-Won Mun
发明人： Il-Ku NAM , Young-Jin Kim , Hyun-Won Mun
CPC分类号： H03G1/0088 , H03F1/342 , H03F1/56 , H03F3/193 , H03F3/45183 , H03F3/45188 , H03F2200/117 , H03F2200/141 , H03F2200/147 , H03F2200/301 , H03F2200/451 , H03F2203/45481 , H03F2203/45524 , H03F2203/45532 , H03F2203/45638 , H03F2203/45641 , H03F2203/45691
摘要： A feedback-type variable gain amplifier including a first field effect transistor, a feedback circuit, and a load circuit. The first field effect transistor receives an input voltage signal through an input node, amplifies the input voltage signal, and outputs the amplified input voltage signal through an output node. The feedback circuit is coupled between the input node and the output node, and generates feedback impedance that is changed in response to a control signal. The load circuit is coupled between the output node and a voltage source, and generates load impedance that is changed in response to the control signal to cancel a change of input impedance due to a change of the feedback impedance. Therefore, since the input impedance is not changed when the gain of the amplifier is changed, a voltage standing wave ratio is good, and a range of gain control is broad.
摘要翻译： 一种反馈型可变增益放大器，包括第一场效应晶体管，反馈电路和负载电路。 第一场效应晶体管通过输入节点接收输入电压信号，放大输入电压信号，并通过输出节点输出放大的输入电压信号。 反馈电路耦合在输入节点和输出节点之间，并产生响应于控制信号而改变的反馈阻抗。 负载电路耦合在输出节点和电压源之间，并且产生响应于控制信号而改变的负载阻抗，以抵消由于反馈阻抗的变化引起的输入阻抗的变化。 因此，由于当放大器的增益改变时输入阻抗不变，所以电压驻波比良好，增益控制范围宽。
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公开(公告)号：US20080122538A1
公开(公告)日：2008-05-29
申请号：US11999421
申请日：2007-12-04
申请人： Seong Su Park , Byoung Gun Choi , Byung Hun Min
发明人： Seong Su Park , Byoung Gun Choi , Byung Hun Min
CPC分类号： H03H11/32 , H03F1/3211 , H03F3/195 , H03F3/45183 , H03F3/45188 , H03F3/45766 , H03F2200/06 , H03F2200/09 , H03F2200/453 , H03F2203/45291 , H03F2203/45302 , H03F2203/45364 , H03F2203/45532
摘要： Provided is a wideband active balun circuit based on a differential amplifier. The active balun circuit is configured to compensate for unbalance between two differential signals and can be applied to wideband systems, such as software defined radio (SDR) systems or ultra wideband (UWB) systems. Also, when signal unbalance is caused by changes in process conditions, such as temperature, errors in amplitude and phase between the two differential signals can be finely tuned by adjusting a voltage tuning terminal outside a chip, so that the active balun circuit can simply solve the unbalance between the two differential signals. Furthermore, input transistors that constitute a pair of differential amplifiers are provided in a cascode structure to prevent the occurrence of signal leakage and self-mixture.
摘要翻译： 提供了一种基于差分放大器的宽带有源平衡 - 不平衡转换电路。 主动平衡 - 不平衡变换器电路被配置为补偿两个差分信号之间的不平衡，并且可以应用于诸如软件定义无线电（SDR）系统或超宽带（UWB）系统的宽带系统。 此外，当信号不平衡是由诸如温度等过程条件的变化引起时，通过调整芯片外部的电压调谐端可以精细地调节两个差分信号之间的幅度和相位误差，使得主动平衡 - 不平衡转换电路可以简单地解决 两个差分信号之间的不平衡。 此外，构成一对差分放大器的输入晶体管以共源共栅结构提供，以防止信号泄漏和自混合的发生。
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公开(公告)号：US20070120603A1
公开(公告)日：2007-05-31
申请号：US11673264
申请日：2007-02-09
申请人： Tienyu Chang , Jinghong Chen
发明人： Tienyu Chang , Jinghong Chen
IPC分类号： H03F3/45
CPC分类号： H03F3/45188 , H03F1/08 , H03F1/26 , H03F1/42 , H03F3/45179 , H03F2200/294 , H03F2200/36 , H03F2200/372 , H03F2203/45481 , H03F2203/45526 , H03F2203/45532 , H03F2203/45554
摘要： A wideband amplifier having an amplifier input terminal and an amplifier output terminal includes at least one transistor coupled to the amplifier input terminal and an impedance element coupled between the amplifier input terminal and the amplifier output terminal. A feedback signal is transmitted between the amplifier output terminal and the amplifier input terminal by way of the impedance element wherein the feedback signal varies in accordance with changes in an impedance of the impedance element so as to peak a frequency response of the amplifier.
摘要翻译： 具有放大器输入端子和放大器输出端子的宽带放大器包括耦合到放大器输入端子的至少一个晶体管和耦合在放大器输入端子和放大器输出端子之间的阻抗元件。 反馈信号通过阻抗元件在放大器输出端和放大器输入端之间传输，其中反馈信号根据阻抗元件的阻抗变化而变化，从而使放大器的频率响应达到峰值。
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4.发明申请Broadband variable gain amplifier with high linearity and variable gain characteristic 有权具有高线性度和可变增益特性的宽带可变增益放大器公开(公告)号：US20030214357A1
公开(公告)日：2003-11-20
申请号：US10438047
申请日：2003-05-15
发明人： Youngho Cho , Bo-Eun Kim , Bonkee Kim
IPC分类号： H03G003/30
CPC分类号： H03F1/342 , H03F3/45183 , H03F2200/108 , H03F2200/117 , H03F2200/141 , H03F2203/45532 , H03G1/007
摘要： A broadband variable gain amplifier with improved linearity and gain characteristic is provided. According to the present invention, the broadband variable gain amplifier comprises: an amplification unit for amplifying an input signal applied to an input terminal and outputting an amplified signal to an output terminal; and a gain control unit which is connected between the input and output terminals, and for controlling gain of said amplification unit, wherein said gain control unit comprises: a variable resistance unit whose resistance value is varied according to a control signal; and a broadband matching unit for proving an optimal impedance characteristic to the input terminal said amplification unit in a broad band, where in said variable gain resistance unit and said broadband matching unit is connected in parallel.
摘要翻译： 提供了具有改善的线性度和增益特性的宽带可变增益放大器。 根据本发明，宽带可变增益放大器包括：放大单元，用于放大施加到输入端的输入信号，并将放大的信号输出到输出端; 以及增益控制单元，其连接在所述输入和输出端子之间并用于控制所述放大单元的增益，其中所述增益控制单元包括：电阻值根据控制信号而变化的可变电阻单元; 以及宽带匹配单元，用于向所述放大单元在宽带中证明最佳阻抗特性，其中所述可变增益电阻单元和所述宽带匹配单元并联连接。
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5.发明授权公开(公告)号：US07633337B2
公开(公告)日：2009-12-15
申请号：US11753739
申请日：2007-05-25
申请人： Il-Ku Nam , Young-Jin Kim , Hyun-Won Mun
发明人： Il-Ku Nam , Young-Jin Kim , Hyun-Won Mun
IPC分类号： H03F1/36
CPC分类号： H03G1/0088 , H03F1/342 , H03F1/56 , H03F3/193 , H03F3/45183 , H03F3/45188 , H03F2200/117 , H03F2200/141 , H03F2200/147 , H03F2200/301 , H03F2200/451 , H03F2203/45481 , H03F2203/45524 , H03F2203/45532 , H03F2203/45638 , H03F2203/45641 , H03F2203/45691
摘要： A feedback-type variable gain amplifier including a first field effect transistor, a feedback circuit, and a load circuit. The first field effect transistor receives an input voltage signal through an input node, amplifies the input voltage signal, and outputs the amplified input voltage signal through an output node. The feedback circuit is coupled between the input node and the output node, and generates feedback impedance that is changed in response to a control signal. The load circuit is coupled between the output node and a voltage source, and generates load impedance that is changed in response to the control signal to cancel a change of input impedance due to a change of the feedback impedance. Therefore, since the input impedance is not changed when the gain of the amplifier is changed, a voltage standing wave ratio is good, and a range of gain control is broad.
摘要翻译： 一种反馈型可变增益放大器，包括第一场效应晶体管，反馈电路和负载电路。 第一场效应晶体管通过输入节点接收输入电压信号，放大输入电压信号，并通过输出节点输出放大的输入电压信号。 反馈电路耦合在输入节点和输出节点之间，并产生响应于控制信号而改变的反馈阻抗。 负载电路耦合在输出节点和电压源之间，并且产生响应于控制信号而改变的负载阻抗，以抵消由于反馈阻抗的变化引起的输入阻抗的变化。 因此，由于当放大器的增益改变时输入阻抗不变，所以电压驻波比良好，增益控制范围宽。
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6.发明授权Broadband variable gain amplifier with high linearity and variable gain characteristic 有权具有高线性度和可变增益特性的宽带可变增益放大器公开(公告)号：US06882226B2
公开(公告)日：2005-04-19
申请号：US10438047
申请日：2003-05-15
申请人： Youngho Cho , Bo-Eun Kim , Bonkee Kim
发明人： Youngho Cho , Bo-Eun Kim , Bonkee Kim
CPC分类号： H03F1/342 , H03F3/45183 , H03F2200/108 , H03F2200/117 , H03F2200/141 , H03F2203/45532 , H03G1/007
摘要： A broadband variable gain amplifier with improved linearity and gain characteristic is provided. According to the present invention, the broadband variable gain amplifier comprises: an amplification unit for amplifying an input signal applied to an input terminal and outputting an amplified signal to an output terminal; and a gain control unit which is connected between the input and output terminals, and for controlling gain of said amplification unit, wherein said gain control unit comprises: a variable resistance unit whose resistance value is varied according to a control signal; and a broadband matching unit for proving an optimal impedance characteristic to the input terminal said amplification unit in a broad band, where in said variable gain resistance unit and said broadband matching unit is connected in parallel.
摘要翻译： 提供了具有改善的线性度和增益特性的宽带可变增益放大器。 根据本发明，宽带可变增益放大器包括：放大单元，用于放大施加到输入端的输入信号，并将放大的信号输出到输出端; 以及增益控制单元，其连接在所述输入和输出端子之间并用于控制所述放大单元的增益，其中所述增益控制单元包括：电阻值根据控制信号而变化的可变电阻单元; 以及宽带匹配单元，用于向所述放大单元在宽带中证明最佳阻抗特性，其中所述可变增益电阻单元和所述宽带匹配单元并联连接。
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公开(公告)号：US07639079B2
公开(公告)日：2009-12-29
申请号：US11673264
申请日：2007-02-09
申请人： Tienyu Chang , Jinghong Chen
发明人： Tienyu Chang , Jinghong Chen
IPC分类号： H03F3/45
CPC分类号： H03F3/45188 , H03F1/08 , H03F1/26 , H03F1/42 , H03F3/45179 , H03F2200/294 , H03F2200/36 , H03F2200/372 , H03F2203/45481 , H03F2203/45526 , H03F2203/45532 , H03F2203/45554
摘要： A wideband amplifier having an amplifier input terminal and an amplifier output terminal includes at least one transistor coupled to the amplifier input terminal and an impedance element coupled between the amplifier input terminal and the amplifier output terminal. A feedback signal is transmitted between the amplifier output terminal and the amplifier input terminal by way of the impedance element wherein the feedback signal varies in accordance with changes in an impedance of the impedance element so as to peak a frequency response of the amplifier.
摘要翻译： 具有放大器输入端子和放大器输出端子的宽带放大器包括耦合到放大器输入端子的至少一个晶体管和耦合在放大器输入端子和放大器输出端子之间的阻抗元件。 反馈信号通过阻抗元件在放大器输出端和放大器输入端之间传输，其中反馈信号根据阻抗元件的阻抗变化而变化，从而使放大器的频率响应达到峰值。
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8.发明授权Digital signal offset adjusting apparatus and pulse pattern generator using the same 失效数字信号偏移调整装置及使用其的脉冲图案发生器公开(公告)号：US07613239B2
公开(公告)日：2009-11-03
申请号：US10579385
申请日：2005-09-29
IPC分类号： H03K7/04
CPC分类号： H04L1/24 , H03F1/3211 , H03F1/42 , H03F3/45475 , H03F3/45968 , H03F2203/45526 , H03F2203/45532 , H03F2203/45554 , H03F2203/45588 , H03F2203/45638 , H03F2203/45681
摘要： A digital signal offset adjusting apparatus has a capacitor causing an output terminal to pass a high frequency band of an input digital signal. A first coil has one end connected to an input terminal and a second coil has one end connected to an output. An operational amplifier has an input connected to another end of the first coil, a second input connected to a direct current voltage generator and an output connected to another end of the second coil. The operational amplifier outputs a signal obtained by subtracting and combining the low frequency band, the direct current component and a direct current bias voltage. A frequency characteristic compensating circuit is connected between a reference point and the second input of the operational amplifier. The gain of the operational amplifier increases with a component having a higher frequency from among low frequency bands of the input digital signal.
摘要翻译： 数字信号偏移调整装置具有使输出端子通过输入数字信号的高频带的电容器。 第一线圈的一端连接到输入端子，第二线圈的一端连接到输出端。 运算放大器具有连接到第一线圈的另一端的输入端，连接到直流电压发生器的第二输入端和连接到第二线圈另一端的输出端。 运算放大器输出通过减去和组合低频带，直流分量和直流偏置电压而获得的信号。 频率特性补偿电路连接在运算放大器的参考点和第二输入端之间。 运算放大器的增益随着输入数字信号的低频带中具有较高频率的分量而增加。
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公开(公告)号：US07538618B2
公开(公告)日：2009-05-26
申请号：US11999421
申请日：2007-12-04
申请人： Seong Su Park , Byoung Gun Choi , Byung Hun Min
发明人： Seong Su Park , Byoung Gun Choi , Byung Hun Min
IPC分类号： H03F3/45
CPC分类号： H03H11/32 , H03F1/3211 , H03F3/195 , H03F3/45183 , H03F3/45188 , H03F3/45766 , H03F2200/06 , H03F2200/09 , H03F2200/453 , H03F2203/45291 , H03F2203/45302 , H03F2203/45364 , H03F2203/45532
摘要： Provided is a wideband active balun circuit based on a differential amplifier. The active balun circuit is configured to compensate for unbalance between two differential signals and can be applied to wideband systems, such as software defined radio (SDR) systems or ultra wideband (UWB) systems. Also, when signal unbalance is caused by changes in process conditions, such as temperature, errors in amplitude and phase between the two differential signals can be finely tuned by adjusting a voltage tuning terminal outside a chip, so that the active balun circuit can simply solve the unbalance between the two differential signals. Furthermore, input transistors that constitute a pair of differential amplifiers are provided in a cascode structure to prevent the occurrence of signal leakage and self-mixture.
摘要翻译： 提供了一种基于差分放大器的宽带有源平衡 - 不平衡转换电路。 主动平衡 - 不平衡变换器电路被配置为补偿两个差分信号之间的不平衡，并且可以应用于诸如软件定义无线电（SDR）系统或超宽带（UWB）系统的宽带系统。 此外，当信号不平衡是由诸如温度等过程条件的变化引起时，通过调整芯片外部的电压调谐端可以精细地调节两个差分信号之间的幅度和相位误差，使得主动平衡 - 不平衡转换电路可以简单地解决 两个差分信号之间的不平衡。 此外，构成一对差分放大器的输入晶体管以共源共栅结构提供，以防止信号泄漏和自混合的发生。
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10.发明申请Digital Signal Offset Adjusting Apparatus and Pulse Pattern Generator Using the Same 失效数字信号偏移调整装置及使用其的脉冲模式发生器公开(公告)号：US20070129903A1
公开(公告)日：2007-06-07
申请号：US10579385
申请日：2005-09-29
IPC分类号： G01R13/00
CPC分类号： H04L1/24 , H03F1/3211 , H03F1/42 , H03F3/45475 , H03F3/45968 , H03F2203/45526 , H03F2203/45532 , H03F2203/45554 , H03F2203/45588 , H03F2203/45638 , H03F2203/45681
摘要： A digital signal offset adjusting apparatus has a capacitor (21) causing an output terminal (20b) to pass through a high frequency band of an input digital signal in order to transmit a wideband digital signal without generating a waveform distortion, a first coil (23), one end of which is connected to an input terminal (20a), the first coil passing a low frequency band and a direct current component to another end, a second coil (22), one end of which is connected to an output end, a operational amplifier (31a), a first input end of which is connected to the other end of the first coil, a second input end of which is connected to a direct current voltage generator (25), an output end of which is connected to the other end of the second coil, the operational amplifier outputting to another end of the second coil a signal obtained by subtracting and combining the low frequency band, the direct current component and a direct current bias voltage, and a frequency characteristic compensating circuit (35) connected between a reference electrical potential point and the second input end of the operational amplifier, the compensating circuit being adopted to compensate for a frequency characteristic so that a gain of the operational amplifier increases with a component having a higher frequency from among low frequency bands of the input digital signal passed to the other end of the first coil.
摘要翻译： 数字信号偏移调整装置具有使输出端子（20b）通过输入数字信号的高频带以便发送宽带数字信号而不产生波形失真的电容器（21），第一线圈 23），其一端连接到输入端子（20a），所述第一线圈通过低频带和直流分量到另一端;第二线圈（22），其一端连接到 输出端，运算放大器（31a），其第一输入端连接到第一线圈的另一端，其第二输入端连接到直流电压发生器（25），输出端 其连接到第二线圈的另一端，运算放大器向第二线圈的另一端输出通过减去和组合低频带，直流分量和直流偏置电压获得的信号，以及频率特性 连接在运算放大器的参考电位点和第二输入端之间的补偿电路（35），补偿电路被用于补偿频率特性，使得运算放大器的增益随着具有较高频率的分量而增加 从输入数字信号的低频带传送到第一线圈的另一端。
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