公开(公告)号：US08135348B2

公开(公告)日：2012-03-13

申请号：US11691737

申请日：2007-03-27

申请人： Vladimir Aparin

发明人： Vladimir Aparin

IPC分类号： H04B1/00 ,  H04B15/00

CPC分类号： H04B1/525

摘要： This disclosure describes techniques for reducing adverse effects of transmit signal leakage in a full-duplex, wireless communication system. The disclosure describes techniques for reducing adverse effects of second order distortion and cross-modulation distortion of transmit signal leakage from a transmitter via a duplexer. The techniques may be effective in rejecting at least a portion of a transmit leakage signal, thereby reducing or eliminating distortion. The adaptive filter may include an estimator circuit that generates a transmit leakage signal estimate. A summer subtracts the estimate from the received signal to cancel transmit leakage and produce an output signal. The estimator circuit generates the transmit leakage signal estimate based on a reference signal and feedback from the output signal. The reference signal approximates the carrier signal used to generate the transmit signal in the transmitter. The reference signal may be provided by the same oscillator used to produce the transmit carrier signal.

摘要翻译： 本公开描述了用于减少全双工无线通信系统中的发射信号泄漏的不利影响的技术。 本公开描述了用于减少来自发射机的双工器的发射信号泄漏的二阶失真和交叉调制失真的不利影响的技术。 这些技术可以有效地拒绝发射泄漏信号的至少一部分，从而减少或消除失真。 自适应滤波器可以包括产生发射泄漏信号估计的估计器电路。 一个夏天从接收到的信号中减去估计值以消除发射泄漏并产生一个输出信号。 估计器电路基于参考信号和来自输出信号的反馈产生发射泄漏信号估计。 参考信号近似于用于在发射机中产生发射信号的载波信号。 参考信号可以由用于产生发射载波信号的相同振荡器提供。

公开(公告)号：US20120011093A1

公开(公告)日：2012-01-12

申请号：US12831871

申请日：2010-07-07

申请人： Vladimir Aparin ,  Subramaniam Venkatraman

发明人： Vladimir Aparin ,  Subramaniam Venkatraman

IPC分类号： G06N3/063

CPC分类号： G06N3/049 ,  G06N3/0472 ,  G06N3/063

摘要： Certain embodiments of the present disclosure support implementation of a digital neural processor with discrete-level synapses and probabilistic synapse weight training.

摘要翻译： 本公开的某些实施例支持具有离散级突触和概率突触重量训练的数字神经处理器的实现。

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。

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。

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。

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。

公开(公告)号：US20050176399A1

公开(公告)日：2005-08-11

申请号：US10920526

申请日：2004-08-17

申请人： Vladimir Aparin

发明人： Vladimir Aparin

IPC分类号： H03F1/22 ,  H03F1/30 ,  H03F1/32 ,  H03F3/193 ,  H03F3/04 ,  H04B1/28

CPC分类号： H03F3/193 ,  H03F1/223 ,  H03F1/301 ,  H03F1/3205 ,  H03F2200/108 ,  H03F2200/162 ,  H03F2200/24 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/489 ,  H03F2200/492 ,  H03F2200/75

摘要： An amplifier comprises a source degeneration inductance and at least two field effect transistors coupled in parallel and having mutually different gate biasing. Source connections of the field effect transistors are coupled along different positions of the source degeneration inductance.

摘要翻译： 放大器包括源极退化电感和并联耦合并且具有相互不同的栅极偏置的至少两个场效应晶体管。 场效应晶体管的源极连接沿源极退化电感的不同位置耦合。

公开(公告)号：US6150852A

公开(公告)日：2000-11-21

申请号：US231852

申请日：1999-01-14

申请人： Vladimir Aparin

发明人： Vladimir Aparin

IPC分类号： H03H7/42 ,  H03F3/45 ,  H03H11/32 ,  H02M11/00

CPC分类号： H03F3/45071

摘要： Many applications require the conversion of a differential current signal into a single-ended signal. The shortcomings encountered with existing approaches include poor conversion efficiency, limited bandwidth, and large size. The converter disclosed uses active devices to obtain a unit of small size and high efficiency having a wide bandwidth of operation.

摘要翻译： 许多应用需要将差分电流信号转换为单端信号。 现有方法遇到的缺点包括转换效率差，带宽有限，大尺寸。 所公开的转换器使用有源器件来获得具有宽的操作带宽的小尺寸和高效率的单元。

公开(公告)号：US5942929A

公开(公告)日：1999-08-24

申请号：US862094

申请日：1997-05-22

申请人： Vladimir Aparin

发明人： Vladimir Aparin

IPC分类号： H03F3/45 ,  H03H11/22 ,  H03K5/00 ,  H03K5/13

CPC分类号： H03F3/45183 ,  H03H11/22 ,  H03F2203/45366 ,  H03F2203/45512

摘要： An active phase splitter comprises two or more phase shift circuits. Each phase shift circuit comprises a number of active devices and capacitors. For a single-pole active phase splitter, within each phase shift circuit, two active devices are configured as a cascode amplifier. The first active device is configured as a common source amplifier and the second active device is configured as a common gate amplifier. A capacitor is connected across the gate and drain of the first active device to generates the necessary pole-zero pair for the phase shift circuit. The cascode configuration results in the desired transfer function and provides transconversion of voltage input to current outputs. Active phase splitters with two or more poles can be built using the same inventive concept.

摘要翻译： 有源分相器包括两个或多个相移电路。 每个移相电路包括多个有源器件和电容器。 对于单极有源分相器，在每个相移电路内，两个有源器件被配置为共源共栅放大器。 第一有源器件被配置为公共源放大器，第二有源器件被配置为公共栅极放大器。 电容器连接在第一有源器件的栅极和漏极之间，以产生相移电路所需的极点对。 共源共栅配置导致所需的传输功能，并提供电压输入到电流输出的转换。 可以使用相同的发明构思构建具有两个或多个极点的有源分相器。