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41. 发明授权

US07755437B2 Phase locked loop system having locking and tracking modes of operation 有权
标题翻译：具有锁定和跟踪操作模式的锁相环系统
公开(公告)号：US07755437B2
公开(公告)日：2010-07-13
申请号：US11211248
申请日：2005-08-24
申请人： Gary John Ballantyne , Gurkanwal Singh Sahota
发明人： Gary John Ballantyne , Gurkanwal Singh Sahota
IPC分类号： H03L7/085
CPC分类号： H03L7/107 , H03L7/093
摘要： An embodiment pertains to a phase locked loop (PLL) circuit. The PLL includes a voltage controlled oscillator which outputs a signal at a desired frequency. A phase detector is coupled to an output from the voltage controlled oscillator. The phase detector compares the phase of a signal output from the voltage controlled oscillator (VCO) with the phase of a reference signal. A loop filter is coupled to the VCO and the phase detector. The loop filter has a locking mode of operation for locking the phase of the VCO signal to the phase of the reference signal. The loop filter can subsequently be placed in a tracking mode of operation which adjusts the phase of the VCO signal to track the phase of the reference signal.
摘要翻译：实施例涉及锁相环（PLL）电路。 PLL包括以期望频率输出信号的压控振荡器。相位检测器耦合到压控振荡器的输出。相位检测器将从压控振荡器（VCO）输出的信号的相位与参考信号的相位进行比较。环路滤波器耦合到VCO和相位检测器。环路滤波器具有用于将VCO信号的相位锁定到参考信号的相位的锁定操作模式。随后可以将环路滤波器置于跟踪操作模式中，该操作模式调整VCO信号的相位以跟踪参考信号的相位。

42. 发明授权

US07076266B2 System and method for power control calibration and a wireless communication device 失效
公开(公告)号：US07076266B2
公开(公告)日：2006-07-11
申请号：US10964404
申请日：2004-10-12
申请人： Gurkanwal Singh Sahota
发明人： Gurkanwal Singh Sahota
IPC分类号： H04B7/00
CPC分类号： H04W52/52 , H04B17/13
摘要： A technique for calibrating the open-loop transmit power of a wireless communication device overcomes the inherent nonlinearities in the gain control input of a variable gain amplifier (VGA). In one embodiment, a feedback circuit generates a signal indicative of the transmit power. This signal is compared with a desired transmit power level, which comprises an open-loop gain component and a closed-loop gain component. The desired transmit power level is compared with the actual transmit power level and an error signal is generated. The error signal is used to alter the gain of the VGA in the transmitter to thereby adjust the actual transmit power level to correspond with the desired transmit power level. In alternative embodiment, the receiver portion, which also contains a VGA, is pre-calibrated in a conventional manner. During a transmitter calibration process, the transmitter is coupled to the receiver input through a mixer and filter. The pre-calibrated receiver determines the actual transmit power level. The difference is used to generate error correction data to adjust for non linearities in the gain control input of the transmitter VGA.

43. 发明授权

US09143172B2 Tunable matching circuits for power amplifiers 有权
标题翻译：功率放大器的可调匹配电路
公开(公告)号：US09143172B2
公开(公告)日：2015-09-22
申请号：US12544177
申请日：2009-08-19
申请人： Puay Hoe See , Aristotele Hadjichristos , Gurkanwal Singh Sahota
发明人： Puay Hoe See , Aristotele Hadjichristos , Gurkanwal Singh Sahota
IPC分类号： H03F3/04 , H04B1/04 , H03F1/56 , H03F3/24 , H03F3/72
CPC分类号： H04B1/0458 , H03F1/565 , H03F3/24 , H03F3/72 , H03F2200/111 , H03F2200/378 , H03F2200/387 , H03F2203/7209
摘要： Tunable matching circuits for power amplifiers are described. In an exemplary design, an apparatus may include a power amplifier and a tunable matching circuit. The power amplifier may amplify an input RF signal and provide an amplified RF signal. The tunable matching circuit may provide output impedance matching for the power amplifier, may receive the amplified RF signal and provide an output RF signal, and may be tunable based on at least one parameter effecting the operation of the power amplifier. The parameter(s) may include an envelope signal for the amplified RF signal, an average output power level of the output RF signal, a power supply voltage for the power amplifier, IC process variations, etc. The tunable matching circuit may include a series variable capacitor and/or a shunt variable capacitor. Each variable capacitor may be tunable based on a control generated based on the parameter(s).
摘要翻译：描述了用于功率放大器的可调谐匹配电路。在示例性设计中，设备可以包括功率放大器和可调谐匹配电路。功率放大器可以放大输入RF信号并提供放大的RF信号。可调谐匹配电路可以为功率放大器提供输出阻抗匹配，可以接收放大的RF信号并提供输出RF信号，并且可以基于影响功率放大器的操作的至少一个参数来调节。参数可以包括放大的RF信号的包络信号，输出RF信号的平均输出功率电平，功率放大器的电源电压，IC过程变化等。可调谐匹配电路可以包括一系列可变电容器和/或分流可变电容器。每个可变电容器可以基于基于参数产生的控制来调节。

44. 发明授权

US08457570B2 System and method for power control calibration and a wireless communication device 有权
公开(公告)号：US08457570B2
公开(公告)日：2013-06-04
申请号：US10964118
申请日：2004-10-12
申请人： Gurkanwal Singh Sahota
发明人： Gurkanwal Singh Sahota
IPC分类号： H01Q11/12 , H04K3/00
CPC分类号： H04W52/52 , H04B17/13
摘要： A technique for calibrating the open-loop transmit power of a wireless communication device overcomes the inherent nonlinearities in the gain control input of a variable gain amplifier (VGA). In one embodiment, a feedback circuit generates a signal indicative of the transmit power. This signal is compared with a desired transmit power level, which comprises an open-loop gain component and a closed-loop gain component. The desired transmit power level is compared with the actual transmit power level and an error signal is generated. The error signal is used to alter the gain of the VGA in the transmitter to thereby adjust the actual transmit power level to correspond with the desired transmit power level. In alternative embodiment, the receiver portion, which also contains a VGA, is pre-calibrated in a conventional manner. During a transmitter calibration process, the transmitter is coupled to the receiver input through a mixer and filter. The pre-calibrated receiver determines the actual transmit power level. The difference is used to generate error correction data to adjust for non linearities in the gain control input of the transmitter VGA.

45. 发明申请

US20130094550A1 SHARED FEEDBACK FOR ADAPTIVE TRANSMITTER PRE-DISTORTION 有权
标题翻译：用于自适应发射机预失真的共享反馈
公开(公告)号：US20130094550A1
公开(公告)日：2013-04-18
申请号：US13364065
申请日：2012-02-01
申请人： Philip D. Coan , Paul J. Draxler , Roberto Rimini , Thomas D. Marra , Gurkanwal Singh Sahota , Steven C. Ciccarelli , Shrenik Patel
发明人： Philip D. Coan , Paul J. Draxler , Roberto Rimini , Thomas D. Marra , Gurkanwal Singh Sahota , Steven C. Ciccarelli , Shrenik Patel
IPC分类号： H04L25/49 , H04B1/38
CPC分类号： H04L27/368 , H03F1/3247 , H03F3/195 , H03F3/245 , H03F3/68 , H03F3/72 , H03F2201/3212 , H03F2203/7221 , H03F2203/7236 , H04B7/0825
摘要： A modem is described. The modem includes a transmitter. The transmitter includes a digital pre-distortion module and a power amplifier. The modem also includes one or more selected shared receivers. The one or more selected shared receivers generate a feedback signal for the digital pre-distortion module. The modem further includes a feedback switch. The feedback switch selectively couples the one or more selected shared receivers to an output of the transmitter.
摘要翻译：调制解调器被描述。调制解调器包括发射机。发射机包括数字预失真模块和功率放大器。调制解调器还包括一个或多个选择的共享接收器。一个或多个选择的共享接收器产生用于数字预失真模块的反馈信号。调制解调器还包括反馈开关。反馈开关将一个或多个选择的共享接收机选择性地耦合到发射机的输出。

46. 发明授权

US08237509B2 Amplifier with integrated filter 有权
标题翻译：带集成滤波器的放大器
公开(公告)号：US08237509B2
公开(公告)日：2012-08-07
申请号：US11852946
申请日：2007-09-10
申请人： Tae Wook Kim , Guy Klemens , Kenneth Charles Barnett , Susanta Sangupta , Gurkanwal Singh Sahota
发明人： Tae Wook Kim , Guy Klemens , Kenneth Charles Barnett , Susanta Sangupta , Gurkanwal Singh Sahota
IPC分类号： H03F3/04
CPC分类号： H03F1/223 , H03F3/195 , H03F3/45188 , H03F3/45475 , H03F3/72 , H03F2200/168 , H03F2200/294 , H03F2200/451 , H03F2203/45034 , H03F2203/45058 , H03F2203/45138 , H03F2203/45296 , H03F2203/45301 , H03F2203/45316 , H03F2203/45396 , H03F2203/7239 , H03G1/0017 , H03G1/0029 , H03G1/0088 , H03G3/3052 , H03G3/3078
摘要： An amplifier with integrated filter (e.g., an LNA) is described. In one design, the amplifier may include a gain stage, a filter stage, and a buffer stage. The gain stage may provide signal amplification for an input signal. The filter stage may provide filtering for the input signal. The buffer stage may buffer a filtered signal from the filter stage. The amplifier may further include a second filter stage and a second buffer stage. The second filter stage may provide additional filtering for the input signal. The second buffer stage may buffer a second filtered signal from the second filter stage. All of the stages may be stacked and coupled between a supply voltage and circuit ground. The filter stage(s) may implement an elliptical lowpass filter. Each filter stage may include an inductor and a capacitor coupled in parallel and forming a resonator tank to attenuate interfering signals.
摘要翻译：描述了具有集成滤波器（例如，LNA）的放大器。在一种设计中，放大器可以包括增益级，滤波级和缓冲级。增益级可以为输入信号提供信号放大。滤波器级可以为输入信号提供滤波。缓冲级可以缓冲来自滤波级的滤波信号。放大器还可以包括第二滤波器级和第二缓冲级。第二滤波器级可以为输入信号提供额外的滤波。第二缓冲级可以缓冲来自第二滤波级的第二滤波信号。所有级可以堆叠并耦合在电源电压和电路接地之间。滤波器级可以实现椭圆形低通滤波器。每个滤波器级可以包括并联耦合的电感器和电容器，并形成谐振器箱以衰减干扰信号。

47. 发明授权

US08059748B2 Multi-mode and multi-band transmitters for wireless communication 有权
标题翻译：用于无线通信的多模和多频发射机
公开(公告)号：US08059748B2
公开(公告)日：2011-11-15
申请号：US11857929
申请日：2007-09-19
申请人： Puay Hoe See , Gurkanwal Singh Sahota , Bo Sun , Gary John Ballantyne , William Ronald Panton , Zae Yong Choi
发明人： Puay Hoe See , Gurkanwal Singh Sahota , Bo Sun , Gary John Ballantyne , William Ronald Panton , Zae Yong Choi
IPC分类号： H04K1/02 , H04B1/04
CPC分类号： H04L27/0008 , H03C3/0916 , H03C3/0975 , H03C5/00 , H03F1/3241 , H03F1/3252 , H04B1/0483 , H04B2001/0425 , H04L27/361 , H04L27/362
摘要： Transmitters supporting multiple modulation modes and/or multiple frequency bands are described. A transmitter may perform large signal polar modulation, small signal polar modulation, and/or quadrature modulation, which may support different modulation schemes and systems. Circuit blocks may be shared by the different modulation modes to reduce cost and power. For example, a single modulator and a single power amplifier may be used for small signal polar modulation and quadrature modulation. The transmitter may apply pre-distortion to improve performance, to allow a power amplifier to support multiple frequency bands, to allow the power amplifier to operate at higher output power levels, etc. Envelope and phase distortions due to non-linearity of the power amplifier may be characterized for different input levels and different bands and stored at the transmitter. Thereafter, envelope and phase signals may be pre-distorted based on the stored characterizations to compensate for non-linearity of the power amplifier.
摘要翻译：描述了支持多个调制模式和/或多个频带的发射机。发射机可以执行可能支持不同调制方案和系统的大信号极性调制，小信号极化调制和/或正交调制。电路块可以由不同的调制模式共享以降低成本和功率。例如，单个调制器和单个功率放大器可以用于小信号极性调制和正交调制。发射机可以应用预失真来提高性能，以允许功率放大器支持多个频带，以允许功率放大器在较高的输出功率电平下工作等。由功率放大器的非线性引起的包络和相位失真可以表征为不同的输入电平和不同的频带并存储在发射机。此后，包络和相位信号可以基于存储的特征来预失真，以补偿功率放大器的非线性。

48. 发明申请

US20100308933A1 TUNABLE MATCHING CIRCUITS FOR POWER AMPLIFIERS 有权
标题翻译：功率放大器的可调匹配电路
公开(公告)号：US20100308933A1
公开(公告)日：2010-12-09
申请号：US12544177
申请日：2009-08-19
申请人： Puay Hoe See , Aristotele Hadjichristos , Gurkanwal Singh Sahota
发明人： Puay Hoe See , Aristotele Hadjichristos , Gurkanwal Singh Sahota
IPC分类号： H03H7/38
CPC分类号： H04B1/0458 , H03F1/565 , H03F3/24 , H03F3/72 , H03F2200/111 , H03F2200/378 , H03F2200/387 , H03F2203/7209
摘要： Tunable matching circuits for power amplifiers are described. In an exemplary design, an apparatus may include a power amplifier and a tunable matching circuit. The power amplifier may amplify an input RF signal and provide an amplified RF signal. The tunable matching circuit may provide output impedance matching for the power amplifier, may receive the amplified RF signal and provide an output RF signal, and may be tunable based on at least one parameter effecting the operation of the power amplifier. The parameter(s) may include an envelope signal for the amplified RF signal, an average output power level of the output RF signal, a power supply voltage for the power amplifier, IC process variations, etc. The tunable matching circuit may include a series variable capacitor and/or a shunt variable capacitor. Each variable capacitor may be tunable based on a control generated based on the parameter(s).
摘要翻译：描述了用于功率放大器的可调谐匹配电路。在示例性设计中，设备可以包括功率放大器和可调谐匹配电路。功率放大器可以放大输入RF信号并提供放大的RF信号。可调谐匹配电路可以为功率放大器提供输出阻抗匹配，可以接收放大的RF信号并提供输出RF信号，并且可以基于影响功率放大器的操作的至少一个参数来调节。参数可以包括放大的RF信号的包络信号，输出RF信号的平均输出功率电平，功率放大器的电源电压，IC过程变化等。可调谐匹配电路可以包括一系列可变电容器和/或分流可变电容器。每个可变电容器可以基于基于参数产生的控制来调节。

49. 发明申请

US20100291888A1 MULTI-MODE MULTI-BAND POWER AMPLIFIER MODULE 有权
标题翻译：多模多功率放大器模块
公开(公告)号：US20100291888A1
公开(公告)日：2010-11-18
申请号：US12575414
申请日：2009-10-07
申请人： Aristotele Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman Frederick, JR. , Gurkanwal Singh Sahota , Marco Cassia , Nathan Pletcher , Yu Zhao , Thomas Myers
发明人： Aristotele Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman Frederick, JR. , Gurkanwal Singh Sahota , Marco Cassia , Nathan Pletcher , Yu Zhao , Thomas Myers
IPC分类号： H04B1/04
CPC分类号： H04B1/0458 , H03F1/0277 , H03F3/24 , H03F3/72 , H03F2203/7236 , H04B1/0483
摘要： A multi-mode multi-band power amplifier (PA) module is described. In an exemplary design, the PA module includes multiple power amplifiers, multiple matching circuits, and a set of switches. Each power amplifier provides power amplification for its input signal when selected. Each matching circuit provides impedance matching and filtering for its power amplifier and provides a respective output signal. The switches configure the power amplifiers to support multiple modes, with each mode being for a particular radio technology. Each power amplifier supports at least two modes. The PA module may further include a driver amplifier and an additional matching circuit. The driver amplifier amplifies an input signal and provides an amplified signal to the power amplifiers. The additional matching circuit combines the outputs of other matching circuits and provides an output signal with higher output power. The driver amplifier and the power amplifiers can support multiple output power levels.
摘要翻译：描述了多模式多频带功率放大器（PA）模块。在示例性设计中，PA模块包括多个功率放大器，多个匹配电路和一组开关。每个功率放大器在选择时为其输入信号提供功率放大。每个匹配电路为其功率放大器提供阻抗匹配和滤波，并提供相应的输出信号。这些开关配置功率放大器以支持多种模式，每种模式都适用于特定的无线电技术。每个功率放大器至少支持两种模式。 PA模块还可以包括驱动器放大器和附加匹配电路。驱动器放大器放大输入信号并向功率放大器提供放大的信号。附加匹配电路组合其他匹配电路的输出，并提供具有较高输出功率的输出信号。驱动器放大器和功率放大器可以支持多个输出功率电平。

50. 发明申请

US20100237945A1 CASCODE AMPLIFIER WITH PROTECTION CIRCUITRY 有权
标题翻译：带保护电路的CASCODE放大器
公开(公告)号：US20100237945A1
公开(公告)日：2010-09-23
申请号：US12407729
申请日：2009-03-19
申请人： Marco Cassia , Gurkanwal Singh Sahota
发明人： Marco Cassia , Gurkanwal Singh Sahota
IPC分类号： H03F3/16
CPC分类号： H03F1/223 , H03F1/523 , H03F3/211 , H03F3/72 , H03F2200/27 , H03F2200/294 , H03F2203/7206 , H03F2203/7215 , H03F2203/7236 , H03G1/0088
摘要： A cascode amplifier with protection circuitry is described. In one exemplary design, the amplifier includes multiple branches coupled in parallel, with at least one branch being switchable between “on” and “off” states. Each switchable branch includes a gain transistor coupled to a cascode transistor. The gain transistor amplifies an input signal and provides an amplified signal in the on state and does not amplify the input signal in the off state. The cascode transistor buffers the amplified signal and provides an output signal in the on state. The output signal swing may be split between the gain transistor and the cascode transistor in both the on and off states with the protection circuitry. Each transistor may then observe a fraction of the voltage swing. The voltage splitting in the off state may be achieved by floating the gain transistor and shorting the gate and source of the cascode transistor.
摘要翻译：描述了具有保护电路的共源共栅放大器。在一个示例性设计中，放大器包括并联耦合的多个分支，至少一个分支可在“开”和“关”状态之间切换。每个可切换分支包括耦合到共源共栅晶体管的增益晶体管。增益晶体管放大输入信号，并将放大的信号提供为导通状态，并且不将输入信号放大在关闭状态。共源共栅晶体管缓冲放大的信号，并提供处于导通状态的输出信号。在保护电路中，输出信号摆幅可以在开关状态和断开状态之间在增益晶体管和共源共栅晶体管之间分开。然后，每个晶体管可以观察电压摆幅的一小部分。断开状态下的分压可以通过使增益晶体管浮置并使共源共栅晶体管的栅极和源极短路来实现。

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