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21. 发明授权

US07398073B2 Low noise mixer 有权
标题翻译：低噪音混音器
公开(公告)号：US07398073B2
公开(公告)日：2008-07-08
申请号：US11220030
申请日：2005-09-06
申请人： Rajasekhar Pullela , Tirdad Sowlati , Dmitriy Rozenblit
发明人： Rajasekhar Pullela , Tirdad Sowlati , Dmitriy Rozenblit
IPC分类号： H04B1/26
CPC分类号： H04B1/28 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/165 , H03D2200/0019 , H03D2200/0084
摘要： A low noise mixer comprises a first mixer core configured to receive a radio frequency (RF) input signal having an RF frequency, and a first local oscillator signal, wherein the first local oscillator signal is at a frequency that is nominally twice the frequency of the RF frequency, the first mixer core configured to switch the RF input signal to at least one secondary mixer core at a frequency that coincides with the frequency of the first local oscillator signal, the at least one secondary mixer core configured to receive the switched RF input signal and a second local oscillator signal, where the second local oscillator signal is at the same nominal frequency as the RF input signal, and wherein switching the RF input signal at the frequency of the first local oscillator signal substantially eliminates flicker noise associated with the down-conversion process.
摘要翻译：低噪声混频器包括被配置为接收具有RF频率的射频（RF）输入信号和第一本地振荡器信号的第一混频器核心，其中第一本地振荡器信号的频率是标称频率为 RF频率，所述第一混频器核心被配置为以与所述第一本机振荡器信号的频率一致的频率将所述RF输入信号切换到至少一个辅助混频器内核，所述至少一个辅助混频器核心被配置为接收所述切换的RF输入信号和第二本地振荡器信号，其中第二本机振荡器信号处于与RF输入信号相同的标称频率，并且其中以第一本地振荡器信号的频率切换RF输入信号基本上消除与下降相关联的闪烁噪声转换过程。

22. 发明授权

US07366484B2 Systems and methods for adjusting the bias level of a mixer in a transmitter 有权
标题翻译：用于调整发射机中混频器偏置电平的系统和方法
公开(公告)号：US07366484B2
公开(公告)日：2008-04-29
申请号：US10861870
申请日：2004-06-04
申请人： Tirdad Sowlati
发明人： Tirdad Sowlati
IPC分类号： H04B1/04
CPC分类号： H03D7/1425 , H03D7/145 , H03D7/1458 , H03D7/1491 , H03D7/165 , H03D2200/0033 , H03D2200/0043
摘要： A mixer having dynamic biasing, comprises a mixer configured to receive a local oscillator (LO) reference signal and a radio frequency (RF) data signal, and a bias control circuit configured to reduce bias current from the mixer under a low power condition.
摘要翻译：具有动态偏置的混频器包括配置成接收本地振荡器（LO）参考信号和射频（RF）数据信号的混频器，以及配置为在低功率条件下减少来自混频器的偏置电流的偏置控制电路。

23. 发明授权

US07355463B2 Loop filter integration in phase-locked loops 有权
标题翻译：环路滤波器集成在锁相环路中
公开(公告)号：US07355463B2
公开(公告)日：2008-04-08
申请号：US11439060
申请日：2006-05-23
申请人： Tirdad Sowlati , Edward Youssoufian
发明人： Tirdad Sowlati , Edward Youssoufian
IPC分类号： H03L7/06 , H00K5/00
CPC分类号： H03L7/0893 , H03L7/093 , H03L7/18 , H03L2207/12
摘要： A phase-locked loop and method are disclosed. One method embodiment includes providing a dual-path filter of a phase-locked loop, the dual-path filter consisting of passive components, and summing control signals in the dual-path filter using the passive components.
摘要翻译：公开了锁相环和方法。一种方法实施例包括提供锁相环路的双路径滤波器，由无源元件组成的双路径滤波器，以及使用无源元件的双路径滤波器中的求和控制信号。

24. 发明申请

US20070264947A1 System and method for saturation detection and compensation in a polar transmitter 审中-公开
标题翻译：极性发射机饱和检测和补偿的系统和方法
公开(公告)号：US20070264947A1
公开(公告)日：2007-11-15
申请号：US11431759
申请日：2006-05-10
申请人： Dmitriy Rozenblit , Tirdad Sowlati , Darioush Agahi , Morten Damgaard
发明人： Dmitriy Rozenblit , Tirdad Sowlati , Darioush Agahi , Morten Damgaard
IPC分类号： H01Q11/12
CPC分类号： H03G3/3047
摘要： A system for saturation detection and compensation in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), a comparator configured to receive the power control signal and a reference signal, the comparator also configured to determine whether the power amplifier is operating in a saturation mode, and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.
摘要翻译：功率放大器中的饱和检测和补偿系统包括：功率放大器，被配置为开发功率控制信号的闭合功率控制回路;配置成接收功率控制信号的比较器;以及参考信号，所述比较器还被配置为确定所述功率放大器是否工作在饱和模式;以及功率控制电路，其被配置为如果所述功率放大器在饱和模式下工作，则降低所述功率控制信号。

25. 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。

26. 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。

27. 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。

28. 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。

29. 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。

30. 发明授权

US07542741B2 System and method for power mapping to compensate for power amplifier gain control variations 有权
标题翻译：用于功率映射的系统和方法，以补偿功率放大器增益控制变化
公开(公告)号：US07542741B2
公开(公告)日：2009-06-02
申请号：US11343442
申请日：2006-01-31
申请人： Dmitriy Rozenblit , Tirdad Sowlati , Dongsoo Koh
发明人： Dmitriy Rozenblit , Tirdad Sowlati , Dongsoo Koh
IPC分类号： H04B1/04
CPC分类号： H03G3/3042
摘要： A system for compensating gain control variations in a power amplifier comprises a power control element configured to receive a power control signal and an instantaneous envelope power reference signal, an adder configured to combine the power control signal and the instantaneous envelope power reference signal to obtain a modified power level signal, and a mapping function configured to receive the modified power level signal and configured to alter a control input to a variable gain amplifier, the variable gain amplifier controlling an adjustable input to the power amplifier.
摘要翻译：用于补偿功率放大器中的增益控制变化的系统包括被配置为接收功率控制信号和瞬时包络功率参考信号的功率控制元件，被配置为组合功率控制信号和瞬时包络功率参考信号以获得修改的功率电平信号，以及映射功能，被配置为接收修改的功率电平信号并且被配置为改变对可变增益放大器的控制输入，所述可变增益放大器控制到功率放大器的可调输入。

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