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1. 发明授权

US08331897B2 Highly linear embedded filtering passive mixer 有权
标题翻译：高线性嵌入式滤波无源混频器
公开(公告)号：US08331897B2
公开(公告)日：2012-12-11
申请号：US12192933
申请日：2008-08-15
申请人： Namsoo Kim , Prasad S. Gudem , Vladimir Aparin
发明人： Namsoo Kim , Prasad S. Gudem , Vladimir Aparin
IPC分类号： H04B1/26
CPC分类号： H03D7/163 , H03D7/1466 , H03D7/166
摘要： A communication channel has a highly linear switched current mixer that incorporates passive filtering (e.g., low pass, notch) for improved transmitting (Tx) and receiving (Rx) with adding external filtering components. A high IIP2 (input referenced second order intercept point) of the receiver at the Tx offset is essential to avoid corrupting the system's sensitivity performance, and a high triple beat (TB) is required to avoid sensitivity degradation due to transmitter leakage. Thanks to the embedded filtering in the mixer and the active post-distortion (APD) method in a low noise amplifier (LNA), the required high linearity is achieved with low noise figure and power consumption, overcoming transmitter power leakage without the use of a SAW (surface acoustic wave) filter.
摘要翻译：通信通道具有高度线性的开关电流混频器，其结合无源滤波（例如，低通，陷波），用于增加外部滤波组件以改善发射（Tx）和接收（Rx）。接收机在Tx偏移处的高IIP2（输入参考二阶截取点）对于避免破坏系统的灵敏度性能至关重要，并且需要高三重（TB）以避免由于发射机泄漏导致的灵敏度劣化。由于混频器中的嵌入式滤波器和低噪声放大器（LNA）中的有源后失真（APD）方法，所需的高线性度可通过低噪声系数和功耗实现，克服发射机功率泄漏而不使用 SAW（表面声波）滤波器。

2. 发明申请

US20090252252A1 HIGHLY LINEAR EMBEDDED FILTERING PASSIVE MIXER 有权
标题翻译：高度线性嵌入式无源混频器
公开(公告)号：US20090252252A1
公开(公告)日：2009-10-08
申请号：US12192933
申请日：2008-08-15
申请人： Namsoo Kim , Prasad S. Gudem , Vladimir Aparin
发明人： Namsoo Kim , Prasad S. Gudem , Vladimir Aparin
IPC分类号： H04L27/02
CPC分类号： H03D7/163 , H03D7/1466 , H03D7/166
摘要： A communication channel has a highly linear switched current mixer that incorporates passive filtering (e.g., low pass, notch) for improved transmitting (Tx) and receiving (Rx) with adding external filtering components. A high IIP2 (input referenced second order intercept point) of the receiver at the Tx offset is essential to avoid corrupting the system's sensitivity performance, and a high triple beat (TB) is required to avoid sensitivity degradation due to transmitter leakage. Thanks to the embedded filtering in the mixer and the active post-distortion (APD) method in a low noise amplifier (LNA), the required high linearity is achieved with low noise figure and power consumption, overcoming transmitter power leakage without the use of a SAW (surface acoustic wave) filter.
摘要翻译：通信通道具有高度线性的开关电流混频器，其结合无源滤波（例如，低通，陷波），用于增加外部滤波组件以改善发射（Tx）和接收（Rx）。接收机在Tx偏移处的高IIP2（输入参考二阶截取点）对于避免破坏系统的灵敏度性能至关重要，并且需要高三重（TB）以避免由于发射机泄漏导致的灵敏度劣化。由于混频器中的嵌入式滤波器和低噪声放大器（LNA）中的有源后失真（APD）方法，所需的高线性度可通过低噪声系数和功耗实现，克服发射机功率泄漏而不使用 SAW（表面声波）滤波器。

3. 发明申请

US20090153244A1 LOW NOISE AND LOW INPUT CAPACITANCE DIFFERENTIAL MDS LNA 有权
标题翻译：低噪声和低输入电容差分MDS LNA
公开(公告)号：US20090153244A1
公开(公告)日：2009-06-18
申请号：US11959196
申请日：2007-12-18
申请人： Jose Cabanillas , Prasad S. Gudem , Namsoo Kim , Cristian Marcu , Anup Savla
发明人： Jose Cabanillas , Prasad S. Gudem , Namsoo Kim , Cristian Marcu , Anup Savla
IPC分类号： H03F3/45
CPC分类号： H03F3/45188 , H03F1/3205 , H03F1/3211 , H03F2203/45318 , H03F2203/45396
摘要： A differential low noise amplifier (LNA) involves two main amplifying transistors biased in saturation, and two cancel transistors biased in sub-threshold. In one example, the gates of the cancel transistors are coupled to the drains of main transistors, in a symmetrical and cross-coupled fashion. The main transistors are source degenerated. Because the gates of cancel transistors are not coupled to the differential input leads of the LNA, the input capacitance of the LNA is reduced. Noise introduced into the LNA output due to the cancel transistors being biased in the sub-threshold region is reduced because there are two stages. The first stage involves the main transistors, and the second stage involves the cancel transistors. By increasing the gain of the first stage and decreasing the gain of the second stage, overall LNA gain is maintained while reducing the noise that the sub-threshold biased transistors contribute to the LNA output.
摘要翻译：差分低噪声放大器（LNA）涉及两个偏置饱和的主放大晶体管，两个取消晶体管偏置为次阈值。在一个示例中，取消晶体管的栅极以对称和交叉耦合的方式耦合到主晶体管的漏极。主晶体管是源极退化的。因为取消晶体管的栅极没有耦合到LNA的差分输入引线，所以LNA的输入电容减小。由于存在两个阶段，由于在子阈值区域偏置的取消晶体管而导入到LNA输出中的噪声被减小。第一级涉及主晶体管，第二级涉及取消晶体管。通过增加第一级的增益并降低第二级的增益，保持整体LNA增益，同时降低子阈值偏置晶体管对LNA输出有贡献的噪声。

4. 发明授权

US07944298B2 Low noise and low input capacitance differential MDS LNA 有权
标题翻译：低噪声和低输入电容差分MDS LNA
公开(公告)号：US07944298B2
公开(公告)日：2011-05-17
申请号：US11959196
申请日：2007-12-18
申请人： Jose Cabanillas , Prasad S. Gudem , Namsoo Kim , Cristian Marcu , Anup Savla
发明人： Jose Cabanillas , Prasad S. Gudem , Namsoo Kim , Cristian Marcu , Anup Savla
IPC分类号： H03F3/45
CPC分类号： H03F3/45188 , H03F1/3205 , H03F1/3211 , H03F2203/45318 , H03F2203/45396
摘要： A differential low noise amplifier (LNA) involves two main amplifying transistors biased in saturation, and two cancel transistors biased in sub-threshold. In one example, the gates of the cancel transistors are coupled to the drains of main transistors, in a symmetrical and cross-coupled fashion. The main transistors are source degenerated. Because the gates of cancel transistors are not coupled to the differential input leads of the LNA, the input capacitance of the LNA is reduced. Noise introduced into the LNA output due to the cancel transistors being biased in the sub-threshold region is reduced because there are two stages. The first stage involves the main transistors, and the second stage involves the cancel transistors. By increasing the gain of the first stage and decreasing the gain of the second stage, overall LNA gain is maintained while reducing the noise that the sub-threshold biased transistors contribute to the LNA output.
摘要翻译：差分低噪声放大器（LNA）涉及两个偏置饱和的主放大晶体管，两个取消晶体管偏置为次阈值。在一个示例中，取消晶体管的栅极以对称和交叉耦合的方式耦合到主晶体管的漏极。主晶体管是源极退化的。因为取消晶体管的栅极没有耦合到LNA的差分输入引线，所以LNA的输入电容减小。由于存在两个阶段，由于在子阈值区域偏置的取消晶体管而导入到LNA输出中的噪声被减小。第一级涉及主晶体管，第二级涉及取消晶体管。通过增加第一级的增益并降低第二级的增益，保持整体LNA增益，同时降低子阈值偏置晶体管对LNA输出有贡献的噪声。

5. 发明授权

US07889007B2 Differential amplifier with active post-distortion linearization 有权
标题翻译：具有有源后失真线性化的差分放大器
公开(公告)号：US07889007B2
公开(公告)日：2011-02-15
申请号：US11696876
申请日：2007-04-05
申请人： Namsoo Kim , Kenneth Charles Barnett , Vladimir Aparin
发明人： Namsoo Kim , Kenneth Charles Barnett , Vladimir Aparin
IPC分类号： H03F3/18
CPC分类号： H03F1/3211 , H03F1/22 , H03F1/223 , H03F1/26 , H03F1/3205 , H03F1/3276 , H03F3/45188 , H03F2200/294 , H03F2200/372 , H03F2200/456 , H03F2200/489 , H03F2200/492 , H03F2203/45296 , H03F2203/45311 , H03F2203/45352 , H03F2203/45386 , H03F2203/45481 , H04B1/525
摘要： A differential amplifier, which has good linearity and noise performance, includes a first side that includes first, second, third, and fourth transistors and an inductor. The first and second transistors are coupled as a first cascode pair, and the third and fourth transistors are coupled as a second cascode pair. The third transistor has its gate coupled to the source of the second transistor, and the fourth transistor has its drain coupled to the drain of the second transistor. The first transistor provides signal amplification. The second transistor provides load isolation and generates an intermediate signal for the third transistor. The third transistor generates distortion components used to cancel third order distortion component generated by the first transistor. The inductor provides source degeneration for the first transistor and improves distortion cancellation. The sizes of the second and third transistors are selected to reduce gain loss and achieve good linearity for the amplifier. The differential amplifier also may include a second side that functions similarly to the first side.
摘要翻译：具有良好线性度和噪声性能的差分放大器包括包括第一，第二，第三和第四晶体管和电感器的第一侧。第一和第二晶体管作为第一共源共栅对耦合，并且第三和第四晶体管作为第二共源共栅对耦合。第三晶体管的栅极耦合到第二晶体管的源极，并且第四晶体管的漏极耦合到第二晶体管的漏极。第一个晶体管提供信号放大。第二晶体管提供负载隔离并为第三晶体管产生中间信号。第三晶体管产生用于消除由第一晶体管产生的三阶失真分量的失真分量。电感器为第一晶体管提供源极退化并改善失真消除。选择第二和第三晶体管的尺寸以减小增益损失并且为放大器获得良好的线性度。差分放大器还可以包括与第一侧类似地起作用的第二侧。

6. 发明授权

US07902925B2 Amplifier with active post-distortion linearization 有权
标题翻译：具有有源后失真线性化的放大器
公开(公告)号：US07902925B2
公开(公告)日：2011-03-08
申请号：US11285949
申请日：2005-11-22
申请人： Namsoo Kim , Kenneth Charles Barnett , Vladimir Aparin
发明人： Namsoo Kim , Kenneth Charles Barnett , Vladimir Aparin
IPC分类号： H03F1/22
CPC分类号： H03F1/223 , H03F1/3205 , H03F1/3276 , H03F2200/294 , H03F2200/372 , H04B1/525
摘要： An amplifier, which has good linearity and noise performance, includes first, second, third, and fourth transistors and an inductor. The first and second transistors are coupled as a first cascode pair, and the third and fourth transistors are coupled as a second cascode pair. The third transistor has its gate coupled to the source of the second transistor, and the fourth transistor has its drain coupled to the drain of the second transistor. The first transistor provides signal amplification. The second transistor provides load isolation and generates an intermediate signal for the third transistor. The third transistor generates distortion components used to cancel third order distortion component generated by the first transistor. The inductor provides source degeneration for the first transistor and improves distortion cancellation. The sizes of the second and third transistors are selected to reduce gain loss and achieve good linearity for the amplifier.
摘要翻译：具有良好线性度和噪声性能的放大器包括第一，第二，第三和第四晶体管和电感器。第一和第二晶体管作为第一共源共栅对耦合，并且第三和第四晶体管作为第二共源共栅对耦合。第三晶体管的栅极耦合到第二晶体管的源极，并且第四晶体管的漏极耦合到第二晶体管的漏极。第一个晶体管提供信号放大。第二晶体管提供负载隔离并为第三晶体管产生中间信号。第三晶体管产生用于消除由第一晶体管产生的三阶失真分量的失真分量。电感器为第一晶体管提供源极退化并改善失真消除。选择第二和第三晶体管的尺寸以减小增益损失并且为放大器获得良好的线性度。

7. 发明申请

US20100244927A1 SPUR ATTENUATION DEVICES, SYSTEMS, AND METHODS 有权
标题翻译： SPUR衰减设备，系统和方法
公开(公告)号：US20100244927A1
公开(公告)日：2010-09-30
申请号：US12494068
申请日：2009-06-29
申请人： Vladimir Aparin , Namsoo Kim , Lennart K. Mathe
发明人： Vladimir Aparin , Namsoo Kim , Lennart K. Mathe
IPC分类号： G06G7/12
CPC分类号： H04B1/525 , H03F1/34 , H03F3/24 , H04B1/0475 , H04B1/109 , H04B1/123 , H04B2001/0433
摘要： Exemplary embodiments of the invention disclose signal filtering. In an exemplary embodiment, a filter device may comprise a subtractor operably coupled between an input and an output and configured to receive an input signal comprising a desired component and at least one undesired frequency component. The filter device may further include a feedback loop configured to receive at least one of the input signal and an output signal from the subtractor and convey a feedback signal comprising at least one undesired component to the subtractor. Each undesired component of the feedback signal corresponds to an associated undesired component of the input signal. Furthermore, the subtractor subtracts the feedback signal from the input signal and convey the output signal
摘要翻译：本发明的示例性实施例公开了信号滤波。在示例性实施例中，滤波器装置可以包括可操作地耦合在输入端和输出端之间并被配置为接收包括期望分量和至少一个不需要的频率分量的输入信号的减法器。滤波器装置还可以包括反馈回路，其被配置为从减法器接收输入信号和输出信号中的至少一个，并将包括至少一个不期望的分量的反馈信号传送到减法器。反馈信号的每个不期望的分量对应于输入信号的相关不期望的分量。此外，减法器从输入信号中减去反馈信号并传送输出信号

8. 发明授权

US07965134B2 Spur attenuation devices, systems, and methods 有权
标题翻译：支线衰减器件，系统和方法
公开(公告)号：US07965134B2
公开(公告)日：2011-06-21
申请号：US12494068
申请日：2009-06-29
申请人： Vladimir Aparin , Namsoo Kim , Lennart K. Mathe
发明人： Vladimir Aparin , Namsoo Kim , Lennart K. Mathe
IPC分类号： H04B1/10
CPC分类号： H04B1/525 , H03F1/34 , H03F3/24 , H04B1/0475 , H04B1/109 , H04B1/123 , H04B2001/0433
摘要： Exemplary embodiments of the invention disclose signal filtering. In an exemplary embodiment, a filter device may comprise a subtractor operably coupled between an input and an output and configured to receive an input signal comprising a desired component and at least one undesired frequency component. The filter device may further include a feedback loop configured to receive at least one of the input signal and an output signal from the subtractor and convey a feedback signal comprising at least one undesired component to the subtractor. Each undesired component of the feedback signal corresponds to an associated undesired component of the input signal. Furthermore, the subtractor subtracts the feedback signal from the input signal and convey the output signal.
摘要翻译：本发明的示例性实施例公开了信号滤波。在示例性实施例中，滤波器装置可以包括可操作地耦合在输入端和输出端之间并被配置为接收包括期望分量和至少一个不需要的频率分量的输入信号的减法器。滤波器装置还可以包括反馈回路，其被配置为从减法器接收输入信号和输出信号中的至少一个，并将包括至少一个不期望的分量的反馈信号传送到减法器。反馈信号的每个不期望的分量对应于输入信号的相关不期望的分量。此外，减法器从输入信号中减去反馈信号并传送输出信号。

9. 发明申请

US20070229154A1 DIFFERENTIAL AMPLIFIER WITH ACTIVE POST-DISTORTION LINEARIZATION 有权
标题翻译：具有主动后失真线性化的差分放大器
公开(公告)号：US20070229154A1
公开(公告)日：2007-10-04
申请号：US11696876
申请日：2007-04-05
申请人： Namsoo Kim , Kenneth Barnett , Vladimir Aparin
发明人： Namsoo Kim , Kenneth Barnett , Vladimir Aparin
IPC分类号： H03F1/26
CPC分类号： H03F1/3211 , H03F1/22 , H03F1/223 , H03F1/26 , H03F1/3205 , H03F1/3276 , H03F3/45188 , H03F2200/294 , H03F2200/372 , H03F2200/456 , H03F2200/489 , H03F2200/492 , H03F2203/45296 , H03F2203/45311 , H03F2203/45352 , H03F2203/45386 , H03F2203/45481 , H04B1/525
摘要： A differential amplifier, which has good linearity and noise performance, includes a first side that includes first, second, third, and fourth transistors and an inductor. The first and second transistors are coupled as a first cascode pair, and the third and fourth transistors are coupled as a second cascode pair. The third transistor has its gate coupled to the source of the second transistor, and the fourth transistor has its drain coupled to the drain of the second transistor. The first transistor provides signal amplification. The second transistor provides load isolation and generates an intermediate signal for the third transistor. The third transistor generates distortion components used to cancel third order distortion component generated by the first transistor. The inductor provides source degeneration for the first transistor and improves distortion cancellation. The sizes of the second and third transistors are selected to reduce gain loss and achieve good linearity for the amplifier. The differential amplifier also may include a second side that functions similarly to the first side.
摘要翻译：具有良好线性度和噪声性能的差分放大器包括包括第一，第二，第三和第四晶体管和电感器的第一侧。第一和第二晶体管作为第一共源共栅对耦合，并且第三和第四晶体管作为第二共源共栅对耦合。第三晶体管的栅极耦合到第二晶体管的源极，并且第四晶体管的漏极耦合到第二晶体管的漏极。第一个晶体管提供信号放大。第二晶体管提供负载隔离并为第三晶体管产生中间信号。第三晶体管产生用于消除由第一晶体管产生的三阶失真分量的失真分量。电感器为第一晶体管提供源极退化并改善失真消除。选择第二和第三晶体管的尺寸以减小增益损失并且为放大器获得良好的线性度。差分放大器还可以包括与第一侧类似地起作用的第二侧。

10. 发明申请

US20070030076A1 Amplifier with active post-distortion linearization 有权
标题翻译：具有有源后失真线性化的放大器
公开(公告)号：US20070030076A1
公开(公告)日：2007-02-08
申请号：US11285949
申请日：2005-11-22
申请人： Namsoo Kim , Kenneth Barnett , Vladimir Aparin
发明人： Namsoo Kim , Kenneth Barnett , Vladimir Aparin
IPC分类号： H03F1/22
CPC分类号： H03F1/223 , H03F1/3205 , H03F1/3276 , H03F2200/294 , H03F2200/372 , H04B1/525
摘要： An amplifier, which has good linearity and noise performance, includes first, second, third, and fourth transistors and an inductor. The first and second transistors are coupled as a first cascode pair, and the third and fourth transistors are coupled as a second cascode pair. The third transistor has its gate coupled to the source of the second transistor, and the fourth transistor has its drain coupled to the drain of the second transistor. The first transistor provides signal amplification. The second transistor provides load isolation and generates an intermediate signal for the third transistor. The third transistor generates distortion components used to cancel third order distortion component generated by the first transistor. The inductor provides source degeneration for the first transistor and improves distortion cancellation. The sizes of the second and third transistors are selected to reduce gain loss and achieve good linearity for the amplifier.
摘要翻译：具有良好线性度和噪声性能的放大器包括第一，第二，第三和第四晶体管和电感器。第一和第二晶体管作为第一共源共栅对耦合，并且第三和第四晶体管作为第二共源共栅对耦合。第三晶体管的栅极耦合到第二晶体管的源极，并且第四晶体管的漏极耦合到第二晶体管的漏极。第一个晶体管提供信号放大。第二晶体管提供负载隔离并为第三晶体管产生中间信号。第三晶体管产生用于消除由第一晶体管产生的三阶失真分量的失真分量。电感器为第一晶体管提供源极退化并改善失真消除。选择第二和第三晶体管的尺寸以减小增益损失并且为放大器获得良好的线性度。

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