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41. 发明申请

US20060003717A1 Quadrature subharmonic mixer 有权
标题翻译：正交次谐调音台
公开(公告)号：US20060003717A1
公开(公告)日：2006-01-05
申请号：US10884757
申请日：2004-07-02
申请人： Tirdad Sowlati
发明人： Tirdad Sowlati
IPC分类号： H04B1/26
CPC分类号： H04B1/30 , H03D7/1433 , H03D7/1458 , H03D7/1475 , H03D7/165 , H03D2200/0023 , H03D2200/0047
摘要： A quadrature subharmonic mixer comprises a polyphase filter configured to generate quadrature components of a local oscillator (LO) reference signal, a summing and scaling element configured to create additional components of the LO reference signal, and a plurality of mixer elements configured to multiply the quadrature components of the LO reference signal and the additional components of the LO reference signal with a radio frequency (RF) signal to obtain a downconverted version of the RF signal.
摘要翻译：正交次谐波混频器包括多相滤波器，其被配置为生成本地振荡器（LO）参考信号的正交分量，被配置为产生LO参考信号的附加分量的求和和比例元素，以及多个混频器元件，被配置为将正交 LO参考信号的分量和具有射频（RF）信号的LO参考信号的附加分量，以获得RF信号的下变频版本。

42. 发明授权

US06593797B1 High-frequency integrated transistor module 失效
标题翻译：高频集成晶体管模块
公开(公告)号：US06593797B1
公开(公告)日：2003-07-15
申请号：US10174317
申请日：2002-06-18
申请人： Tirdad Sowlati
发明人： Tirdad Sowlati
IPC分类号： H03K1760
CPC分类号： H03F3/19 , H01L2924/0002 , H03F3/211 , H03F2203/21178 , H01L2924/00
摘要： A high-frequency integrated transistor module includes a bipolar transistor having at least one emitter finger, which is internally connected in series with a resistor to provide a DC current path for the circuit, and is internally connected in series with a capacitor to provide an RF current path for the module separate from the DC current path. The capacitor may be coupled to an RF ground connection, and the value of the capacitor may be selected to resonate with the value of the RF ground connection inductance in order to provide gain enhancement at a selected operating frequency range. In order to provide gain enhancement over a broader frequency bandwidth, two or more emitter fingers can be connected in series with respective capacitors of different values in order to provide at least two RF current paths having different resonant frequencies.
摘要翻译：高频集成晶体管模块包括具有至少一个发射极指的双极晶体管，其内部与电阻器串联连接以提供用于电路的DC电流通路，并且与电容器串联连接以提供RF 模块的电流路径与直流电流路径分开。电容器可以耦合到RF接地连接，并且可以选择电容器的值以与RF接地连接电感的值谐振，以便在选定的工作频率范围内提供增益。为了在更宽的频率带宽上提供增益增益，可以将两个或多个发射极指与串联不同值的相应电容器串联，以便提供具有不同谐振频率的至少两个RF电流路径。

43. 发明授权

US06498533B1 Bootstrapped dual-gate class E amplifier circuit 失效
标题翻译：自举双门级E放大器电路
公开(公告)号：US06498533B1
公开(公告)日：2002-12-24
申请号：US09671911
申请日：2000-09-28
申请人： Tirdad Sowlati
发明人： Tirdad Sowlati
IPC分类号： H03F122
CPC分类号： H03K17/102 , H03F1/223 , H03F3/2176
摘要： A bootstrapped dual-gate Class E amplifier circuit includes a first MOSFET and a second MOSFET connected in series and coupled between a dc voltage source terminal and a common terminal. An rf input signal terminal is coupled to a gate electrode of the first MOSFET and a dc control voltage terminal is coupled to a gate electrode of the second MOSFET, with a unidirectionally-conducting element such as a diode-connected MOSFET being coupled between a drain electrode and the gate electrode of the second MOSFET. The output of the amplifier circuit is taken from the drain electrode of the second MOSFET. This circuit configuration permits the first and second MOSFETs to withstand a larger output voltage swing, thus permitting the use of a higher supply voltage and resulting in a substantially increased maximum output power capability for a given load value.
摘要翻译：自举双栅E类放大器电路包括串联连接并耦合在直流电压源端子和公共端子之间的第一MOSFET和第二MOSFET。 RF输入信号端子耦合到第一MOSFET的栅电极，并且直流控制电压端子耦合到第二MOSFET的栅电极，其中单向导电元件例如二极管连接的MOSFET耦合在漏极电极和第二MOSFET的栅电极。放大器电路的输出取自第二MOSFET的漏电极。该电路配置允许第一和第二MOSFET承受更大的输出电压摆幅，从而允许使用更高的电源电压，并且对于给定的负载值，导致基本上增加的最大输出功率能力。

44. 发明授权

US06300837B1 Dynamic bias boosting circuit for a power amplifier 有权
标题翻译：功率放大器的动态偏置升压电路
公开(公告)号：US06300837B1
公开(公告)日：2001-10-09
申请号：US09536946
申请日：2000-03-28
申请人： Tirdad Sowlati , Sifen Luo
发明人： Tirdad Sowlati , Sifen Luo
IPC分类号： H03F326
CPC分类号： H03F1/0261
摘要： A power amplifier circuit includes an amplifying transistor and a dc bias circuit for biasing the amplifier transistor to obtain a conduction angle of at least about 180°. The dc bias circuit includes a dynamic bias boosting circuit for increasing the dc bias current provided to the amplifying transistor by the dc bias circuit in direct proportion to an increase in the input signal provided to the power amplifier. The bias boosting circuit permits the power amplifier circuits to operate in Class B or Class AB with improved power output characteristics and reduced power dissipation at low power levels.
摘要翻译：功率放大器电路包括放大晶体管和用于偏置放大器晶体管以获得至少约180°的导通角的直流偏置电路。直流偏置电路包括动态偏置升压电路，用于通过直流偏置电路与提供给功率放大器的输入信号的增加成正比地增加提供给放大晶体管的直流偏置电流。偏置升压电路允许功率放大器电路在B类或AB类中工作，具有改善的功率输出特性，并在低功率水平下降低功耗。

45. 发明授权

US08760189B2 Apparatus to implement symmetric single-ended termination in differential voltage-mode drivers 有权
标题翻译：在差分电压模式驱动器中实现对称单端端接的装置
公开(公告)号：US08760189B2
公开(公告)日：2014-06-24
申请号：US13248485
申请日：2011-09-29
申请人： Cheng Zhong , Vannam Dang , Miao Li , Fares K. Maarouf , Tirdad Sowlati
发明人： Cheng Zhong , Vannam Dang , Miao Li , Fares K. Maarouf , Tirdad Sowlati
IPC分类号： H03K17/16
CPC分类号： H04L25/0274 , H04L25/0278
摘要： A differential voltage mode driver for implementing symmetric single ended termination includes an output driver circuitry having a predefined termination impedance. The differential voltage mode driver also includes an output driver replica having independently controlled first and second portions. The first and second portions are independently controlled to establish a substantially equal on-resistance of the first and the second portions. The output driver replica controls the predefined termination impedance of the output driver circuitry.
摘要翻译：用于实现对称单端终端的差分电压模式驱动器包括具有预定义的终端阻抗的输出驱动器电路。差分电压模式驱动器还包括具有独立控制的第一和第二部分的输出驱动器副本。独立地控制第一和第二部分以建立第一和第二部分的基本相等的导通电阻。输出驱动器副本控制输出驱动器电路的预定终止阻抗。

46. 发明申请

US20120109356A1 Method and Digital Circuit for Recovering a Clock and Data from an Input Signal Using a Digital Frequency Detection 有权
标题翻译：使用数字频率检测从输入信号中恢复时钟和数据的方法和数字电路
公开(公告)号：US20120109356A1
公开(公告)日：2012-05-03
申请号：US12938405
申请日：2010-11-03
申请人： Xiaohua Kong , Zhi Zhu , Nam V. Dang , Tirdad Sowlati
发明人： Xiaohua Kong , Zhi Zhu , Nam V. Dang , Tirdad Sowlati
IPC分类号： G01R13/02 , G06F19/00 , H03L7/06
CPC分类号： H04L7/033 , H04L7/0337
摘要： In a particular embodiment, a digital circuit includes a frequency detection circuit operative to compare information related to transitions between sequential samples of a received signal. The frequency detection circuit is further operative to generate a control signal to reduce a sampling rate of the received signal in response to a predetermined number of the sequential samples having a same value. The digital circuit also includes a digital phase detector operative to provide the information related to the transitions between sequential samples to the frequency detection circuit.
摘要翻译：在特定实施例中，数字电路包括频率检测电路，其可操作以比较与接收信号的连续采样之间的转换有关的信息。频率检测电路进一步操作以产生控制信号，以响应于具有相同值的预定数量的顺序样本来减小接收信号的采样率。该数字电路还包括一个数字相位检测器，可操作以提供与频率检测电路的连续样本之间的转换有关的信息。

47. 发明授权

US07356318B2 Quadrature subharmonic mixer 有权
标题翻译：正交次谐调音台
公开(公告)号：US07356318B2
公开(公告)日：2008-04-08
申请号：US10884757
申请日：2004-07-02
申请人： Tirdad Sowlati
发明人： Tirdad Sowlati
IPC分类号： H04B1/26
CPC分类号： H04B1/30 , H03D7/1433 , H03D7/1458 , H03D7/1475 , H03D7/165 , H03D2200/0023 , H03D2200/0047
摘要： A quadrature subharmonic mixer comprises a polyphase filter configured to generate quadrature components of a local oscillator (LO) reference signal, a summing and scaling element configured to create additional components of the LO reference signal, and a plurality of mixer elements configured to multiply the quadrature components of the LO reference signal and the additional components of the LO reference signal with a radio frequency (RF) signal to obtain a downconverted version of the RF signal.
摘要翻译：正交次谐波混频器包括多相滤波器，其被配置为生成本地振荡器（LO）参考信号的正交分量，被配置为产生LO参考信号的附加分量的求和和比例元素，以及多个混频器元件，被配置为将正交 LO参考信号的分量和具有射频（RF）信号的LO参考信号的附加分量，以获得RF信号的下变频版本。

48. 发明授权

US07271656B2 Sliding bias circuit for enabling dynamic control of quiescent current in a linear power amplifier 有权
标题翻译：滑动偏置电路，用于在线性功率放大器中实现静态电流的动态控制
公开(公告)号：US07271656B2
公开(公告)日：2007-09-18
申请号：US10538348
申请日：2003-11-28
申请人： Christophe Joly , Tirdad Sowlati
发明人： Christophe Joly , Tirdad Sowlati
IPC分类号： H03G3/10
CPC分类号： H03F1/0261 , H03F1/0266 , H03F1/30 , H03F1/302 , H03F3/195 , H03F3/343 , H03G3/3047
摘要： A sliding bias circuit for dynamically controlling quiescent current flowing through an output transistor of a linear power amplifier operating in an output frequency band, the linear power amplifier comprising a circuit device for generating a bias signal producing a quiescent current flowing through the output transistor of the RF power amplifier, the sliding bias circuit comprising a detector circuit for detecting RF input to the amplifier and generating an output signal tracking the detected RF input, the output signal directly coupled to the circuit device for automatically modifying the bias signal and the quiescent current through the output transistor. In this manner, the quiescent current at the output stage is reduced and optimized for minimum dissipation and optimal linearity at all power output levels.
摘要翻译：一种用于动态地控制流过在输出频带中工作的线性功率放大器的输出晶体管的静态电流的滑动偏置电路，所述线性功率放大器包括用于产生偏置信号的电路装置，所述偏置信号产生流过所述输出晶体管的输出晶体管的静态电流 RF功率放大器，滑动偏置电路包括用于检测RF输入到放大器并产生跟踪检测到的RF输入的输出信号的检测器电路，该输出信号直接耦合到电路装置，用于自动修改偏置信号和静态电流通过输出晶体管。以这种方式，降低输出级的静态电流并优化所有功率输出电平下的最小耗散和最佳线性度。

49. 发明申请

US20070087720A1 Downconverting mixer 有权
标题翻译：下变频混频器
公开(公告)号：US20070087720A1
公开(公告)日：2007-04-19
申请号：US11250995
申请日：2005-10-14
申请人： Raja Pullela , Peihua Ye , Tirdad Sowlati
发明人： Raja Pullela , Peihua Ye , Tirdad Sowlati
IPC分类号： H04B1/26
CPC分类号： H03D7/18 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/165 , H03D2200/0047
摘要： A downconverter is provided. The downconverter includes a I mixer and a Q mixer. Each mixer includes a transconductance stage and a mixer core stage. The outputs of the transconductance stages of the mixers are shorted together, and a resistors are arranged in series with an input of the mixer core stages.
摘要翻译：提供下变频器。下变频器包括I混频器和Q混频器。每个混合器包括跨导级和混频器核级。混频器的跨导级的输出短路在一起，并且电阻器与混频器核心级的输入串联布置。

50. 发明申请

US20060244533A1 Sliding bias circuit for enabling dynamic control of quiescent current in a linear power amplifier 有权
标题翻译：滑动偏置电路，用于在线性功率放大器中实现静态电流的动态控制
公开(公告)号：US20060244533A1
公开(公告)日：2006-11-02
申请号：US10538348
申请日：2003-11-28
申请人： Christophe Joly , Tirdad Sowlati
发明人： Christophe Joly , Tirdad Sowlati
IPC分类号： H03G3/10
CPC分类号： H03F1/0261 , H03F1/0266 , H03F1/30 , H03F1/302 , H03F3/195 , H03F3/343 , H03G3/3047
摘要： A sliding bias circuit for dynamically controlling quiescent current flowing through an output transistor of a linear power amplifier operating in an output frequency band, the linear power amplifier comprising a circuit device for generating a bias signal producing a quiescent current flowing through the output transistor of the RF power amplifier, the sliding bias circuit comprising a detector circuit for detecting RF input to the amplifier and generating an output signal tracking the detected RF input, the output signal directly coupled to the circuit device for automatically modifying the bias signal and the quiescent current through the output transistor. In this manner, the quiescent current at the output stage is reduced and optimized for minimum dissipation and optimal linearity at all power output levels.
摘要翻译：一种用于动态地控制流过在输出频带中工作的线性功率放大器的输出晶体管的静态电流的滑动偏置电路，所述线性功率放大器包括用于产生偏置信号的电路装置，所述偏置信号产生流过所述输出晶体管的输出晶体管的静态电流 RF功率放大器，滑动偏置电路包括用于检测RF输入到放大器并产生跟踪检测到的RF输入的输出信号的检测器电路，该输出信号直接耦合到电路装置，用于自动修改偏置信号和静态电流通过输出晶体管。以这种方式，降低输出级的静态电流并优化所有功率输出电平下的最小耗散和最佳线性度。

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