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1. 发明授权

US08971830B2 Multi-mode multi-band power amplifier module 有权
标题翻译：多模式多频段功率放大器模块
公开(公告)号：US08971830B2
公开(公告)日：2015-03-03
申请号：US12575414
申请日：2009-10-07
申请人： Aristotle Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman L Frederick, Jr. , Gurkanwal S Sahota , Marco Cassia , Nathan M Pletcher , Yu Zhao , Thomas A Myers
发明人： Aristotle Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman L Frederick, Jr. , Gurkanwal S Sahota , Marco Cassia , Nathan M Pletcher , Yu Zhao , Thomas A Myers
IPC分类号： H01Q11/12 , H04B1/04 , H03F1/02 , H03F3/24 , H03F3/72
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。

2. 发明授权

US08666338B2 Multi-mode bypass driver amplifier with tunable load matching 有权
标题翻译：具有可调负载匹配的多模式旁路驱动放大器
公开(公告)号：US08666338B2
公开(公告)日：2014-03-04
申请号：US13356492
申请日：2012-01-23
申请人： Yu Zhao , Nathan M. Pletcher
发明人： Yu Zhao , Nathan M. Pletcher
IPC分类号： H01Q11/12
CPC分类号： H03F1/0277 , H03F1/565 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/213 , H03F2200/222 , H03F2200/318 , H03F2200/378 , H03F2200/387 , H03F2200/411 , H03F2203/21136 , H03F2203/21175 , H03F2203/7233 , H03F2203/7239
摘要： A multi-mode driver amplifier with tunable load matching is disclosed. In an exemplary design, an apparatus includes a multi-mode driver amplifier and a tunable impedance matching circuit. The driver amplifier amplifies an input radio frequency (RF) signal and provides an amplified RF signal. The tunable impedance matching circuit matches an output impedance of the driver amplifier. The apparatus may include a main transmit path and a bypass transmit path. The bypass transmit path may include the driver amplifier and the tunable impedance matching circuit and no power amplifier. The main transmit path may include a second driver amplifier and a power amplifier. The main transmit path may be selected for transmit power levels higher than a threshold level, and the bypass transmit path may be selected for transmit power levels lower than the threshold level.
摘要翻译：公开了一种具有可调负载匹配的多模驱动放大器。在示例性设计中，装置包括多模式驱动器放大器和可调谐阻抗匹配电路。驱动器放大器放大输入射频（RF）信号并提供放大的RF信号。可调阻抗匹配电路匹配驱动器放大器的输出阻抗。该装置可以包括主发射路径和旁路发射路径。旁路发射路径可以包括驱动放大器和可调谐阻抗匹配电路，而不包括功率放大器。主发射路径可以包括第二驱动放大器和功率放大器。可以为高于阈值电平的发射功率电平选择主发射路径，并且可以选择低于阈值电平的发射功率电平的旁路发射路径。

3. 发明授权

US08432237B2 Output circuit with integrated impedance matching, power combining and filtering for power amplifiers and other circuits 有权
标题翻译：具有集成阻抗匹配，功率放大器和其他电路的功率组合和滤波的输出电路
公开(公告)号：US08432237B2
公开(公告)日：2013-04-30
申请号：US12541831
申请日：2009-08-14
申请人： Guy Klemens , Nathan M Pletcher , Babak Nejati , Norman L Frederick , Thomas A Myers
发明人： Guy Klemens , Nathan M Pletcher , Babak Nejati , Norman L Frederick , Thomas A Myers
IPC分类号： H01P5/12 , H03H7/38
CPC分类号： H03H7/38 , H03F1/56 , H03F3/195 , H03F3/245 , H03F3/604 , H03F2200/108 , H03F2200/171 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/411 , H03F2200/414 , H03F2200/451 , H03H7/48 , H04B1/0483
摘要： An output circuit with integrated impedance matching, power combining, and filtering and suitable for use with power amplifiers and other circuits is described. In an exemplary design, an apparatus may include first and second circuits (e.g., power amplifiers) and an output circuit. The first circuit may provide a first single-ended signal and may have a first output impedance. The second circuit may provide a second single-ended signal and may have a second output impedance. The output circuit may include (i) first and second matching circuits that perform output impedance matching and filtering for the first and second circuits, (ii) a combiner (e.g., a summing node) that combines the first and second single-ended signals to obtain a combined single-ended signal, (iii) a third matching circuit that performs impedance matching and filtering for the combined single-ended signal, and (iv) switches to route the single-ended signals to different outputs.
摘要翻译：描述了具有集成阻抗匹配，功率组合和滤波并适用于功率放大器和其他电路的输出电路。在示例性设计中，装置可以包括第一和第二电路（例如，功率放大器）和输出电路。第一电路可以提供第一单端信号并且可以具有第一输出阻抗。第二电路可以提供第二单端信号并且可以具有第二输出阻抗。输出电路可以包括（i）对第一和第二电路执行输出阻抗匹配和滤波的第一和第二匹配电路，（ii）将第一和第二单端信号组合到的组合器（例如，求和节点）获得组合的单端信号，（iii）对组合的单端信号执行阻抗匹配和滤波的第三匹配电路，以及（iv）将单端信号路由到不同输出的开关。

4. 发明授权

US08072272B2 Digital tunable inter-stage matching circuit 有权
标题翻译：数字可调谐级间匹配电路
公开(公告)号：US08072272B2
公开(公告)日：2011-12-06
申请号：US12715254
申请日：2010-03-01
申请人： Yu Zhao , Babak Nejati , Nathan M Pletcher , Aristotele Hadjichristos
发明人： Yu Zhao , Babak Nejati , Nathan M Pletcher , Aristotele Hadjichristos
IPC分类号： H03F3/04
CPC分类号： H03F1/42 , H03F1/223 , H03F3/193 , H03F2200/318 , H03H7/40
摘要： A tunable inter-stage matching circuit that can improve performance is described. In an exemplary design, an apparatus includes a first active circuit (e.g., a driver amplifier), a second active circuit (e.g., a power amplifier), and a tunable inter-stage matching circuit coupled between the first and second active circuits. The tunable inter-stage matching circuit includes a tunable capacitor that can be varied in discrete steps to adjust impedance matching between the first and second active circuits. In an exemplary design, the tunable capacitor includes (i) a plurality of capacitors coupled in parallel and (ii) a plurality of switches coupled to the plurality of capacitors, one switch for each capacitor. Each switch may be turned on to select an associated capacitor or turned off to unselect the associated capacitor. The tunable capacitor may further include a fixed capacitor coupled in parallel with the plurality of capacitors.
摘要翻译：描述了可以提高性能的可调谐级间匹配电路。在示例性设计中，装置包括耦合在第一和第二有源电路之间的第一有源电路（例如，驱动器放大器），第二有源电路（例如，功率放大器）和可调谐级间匹配电路。可调谐级间匹配电路包括可以在离散步骤中变化的可调谐电容器，以调整第一和第二有源电路之间的阻抗匹配。在示例性设计中，可调谐电容器包括（i）并联耦合的多个电容器和（ii）耦合到多个电容器的多个开关，用于每个电容器的一个开关。每个开关可以被接通以选择一个相关联的电容器或关闭以取消选择相关联的电容器。可调谐电容器还可以包括与多个电容器并联耦合的固定电容器。

5. 发明授权

US09166533B2 Bias current monitor and control mechanism for amplifiers 有权
标题翻译：放大器的偏置电流监视和控制机制
公开(公告)号：US09166533B2
公开(公告)日：2015-10-20
申请号：US12704432
申请日：2010-02-11
申请人： Thomas D. Marra , Aristotele Hadjichristos , Nathan M. Pletcher
发明人： Thomas D. Marra , Aristotele Hadjichristos , Nathan M. Pletcher
IPC分类号： H03G3/10 , H03F3/04 , H03F1/30 , H03F3/189
CPC分类号： H03F1/301 , H03F1/30 , H03F3/04 , H03F3/189
摘要： Techniques for monitoring and controlling bias current of amplifiers are described. In an exemplary design, an apparatus may include an amplifier and a bias circuit. The amplifier may include at least one transistor coupled to an inductor. The bias circuit may generate at least one bias voltage for the at least one transistor in the amplifier to obtain a target bias current for the amplifier. The bias circuit may generate the at least one bias voltage based on a voltage across the inductor in the amplifier, or a current through a current mirror formed with one of the at least one transistor in the amplifier, or a gate-to-source voltage of one of the at least one transistor in the amplifier, or a voltage in a replica circuit replicating the amplifier, or a current applied to the amplifier with a switched mode power supply disabled.
摘要翻译：描述了用于监视和控制放大器偏置电流的技术。在示例性设计中，装置可以包括放大器和偏置电路。放大器可以包括耦合到电感器的至少一个晶体管。偏置电路可以为放大器中的至少一个晶体管产生至少一个偏置电压，以获得放大器的目标偏置电流。偏置电路可以基于放大器中的电感器两端的电压或通过放大器中的至少一个晶体管中的一个形成的电流镜的电流或栅极至源极电压来产生至少一个偏置电压放大器中的至少一个晶体管中的一个，或复制放大器的复制电路中的电压，或禁用开关模式电源的施加到放大器的电流。

6. 发明授权

US08461921B2 Amplifier module with multiple operating modes 有权
标题翻译：具有多种工作模式的放大器模块
公开(公告)号：US08461921B2
公开(公告)日：2013-06-11
申请号：US13226400
申请日：2011-09-06
申请人： Nathan M Pletcher , Aristotele Hadjichristos , Babak Nejati
发明人： Nathan M Pletcher , Aristotele Hadjichristos , Babak Nejati
IPC分类号： H03F1/14
CPC分类号： H03F1/0277 , H03F1/56 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/222 , H03F2200/27 , H03F2200/318 , H03F2200/387 , H03F2200/411 , H03F2200/451 , H03F2200/522 , H03F2200/75 , H03F2203/21136 , H03F2203/21139 , H03F2203/21142 , H03F2203/21157 , H03F2203/21175 , H03F2203/21196 , H03F2203/7206 , H03F2203/7236 , H03G1/0088
摘要： An amplifier module with multiple operating modes is described. In an exemplary design, an apparatus includes a plurality of amplifiers. The apparatus may also include a plurality of switches, each switch coupled to an output of an associated amplifier in the plurality of amplifiers and configured to provide an amplified signal in a first mode and bypass the associated amplifier and provide an associated bypass signal in a second mode. Further, the apparatus may include an output circuit including a plurality of matching circuits, each matching circuit coupled to an associated amplifier in the plurality of amplifiers and an associated switch in the plurality of switches.
摘要翻译：描述具有多种工作模式的放大器模块。在示例性设计中，装置包括多个放大器。该装置还可以包括多个开关，每个开关耦合到多个放大器中的相关联的放大器的输出，并且被配置为以第一模式提供放大的信号并且旁路相关的放大器并在第二模式中提供相关的旁路信号模式。此外，该装置可以包括包括多个匹配电路的输出电路，每个匹配电路耦合到多个放大器中的相关联的放大器以及多个开关中的关联开关。

7. 发明申请

US20110043285A1 DIGITAL TUNABLE INTER-STAGE MATCHING CIRCUIT 有权
标题翻译：数字可调节间歇匹配电路
公开(公告)号：US20110043285A1
公开(公告)日：2011-02-24
申请号：US12715254
申请日：2010-03-01
申请人： Yu Zhao , Babak Nejati , Nathan M. Pletcher , Aristotele Hadjichristos
发明人： Yu Zhao , Babak Nejati , Nathan M. Pletcher , Aristotele Hadjichristos
IPC分类号： H03F3/16
CPC分类号： H03F1/42 , H03F1/223 , H03F3/193 , H03F2200/318 , H03H7/40
摘要： A tunable inter-stage matching circuit that can improve performance is described. In an exemplary design, an apparatus includes a first active circuit (e.g., a driver amplifier), a second active circuit (e.g., a power amplifier), and a tunable inter-stage matching circuit coupled between the first and second active circuits. The tunable inter-stage matching circuit includes a tunable capacitor that can be varied in discrete steps to adjust impedance matching between the first and second active circuits. In an exemplary design, the tunable capacitor includes (i) a plurality of capacitors coupled in parallel and (ii) a plurality of switches coupled to the plurality of capacitors, one switch for each capacitor. Each switch may be turned on to select an associated capacitor or turned off to unselect the associated capacitor. The tunable capacitor may further include a fixed capacitor coupled in parallel with the plurality of capacitors.
摘要翻译：描述了可以提高性能的可调谐级间匹配电路。在示例性设计中，装置包括耦合在第一和第二有源电路之间的第一有源电路（例如，驱动器放大器），第二有源电路（例如，功率放大器）和可调谐级间匹配电路。可调谐级间匹配电路包括可以在离散步骤中变化的可调谐电容器，以调整第一和第二有源电路之间的阻抗匹配。在示例性设计中，可调谐电容器包括（i）并联耦合的多个电容器和（ii）耦合到多个电容器的多个开关，用于每个电容器的一个开关。每个开关可以被接通以选择一个相关联的电容器或关闭以取消选择相关联的电容器。可调谐电容器还可以包括与多个电容器并联耦合的固定电容器。

8. 发明授权

US08847689B2 Stacked amplifier with diode-based biasing 有权
标题翻译：具有基于二极管的偏置的堆叠放大器
公开(公告)号：US08847689B2
公开(公告)日：2014-09-30
申请号：US12711858
申请日：2010-02-24
申请人： Yu Zhao , Nathan M. Pletcher
发明人： Yu Zhao , Nathan M. Pletcher
IPC分类号： H03F3/04
CPC分类号： H03F1/0283 , H03F1/301 , H03F3/189
摘要： Techniques for improving linearity of amplifiers are described. In an exemplary design, an amplifier (e.g., a power amplifier) may include a plurality of transistors coupled in a stack and at least one diode. The plurality of transistors may receive and amplify an input signal and provide an output signal. The at least one diode may be operatively coupled to at least one transistor in the stack. Each diode may provide a variable bias voltage to an associated transistor in the stack. Each diode may have a lower voltage drop across the diode at high input power and may provide a higher bias voltage to the associated transistor at high input power. The at least one transistor may have higher gain at high input power due to the higher bias voltage from the at least one diode. The higher gain may improve the linearity of the amplifier.
摘要翻译：描述了用于提高放大器线性度的技术。在示例性设计中，放大器（例如，功率放大器）可以包括耦合在堆叠中的多个晶体管和至少一个二极管。多个晶体管可以接收和放大输入信号并提供输出信号。至少一个二极管可以可操作地耦合到堆叠中的至少一个晶体管。每个二极管可以向堆叠中的相关联的晶体管提供可变偏置电压。每个二极管可以在高输入功率下在二极管上具有较低的电压降，并且可以在高输入功率下向相关联的晶体管提供更高的偏置电压。由于来自至少一个二极管的较高偏置电压，至少一个晶体管可能在高输入功率下具有更高的增益。较高的增益可以提高放大器的线性度。

9. 发明授权

US08536950B2 Multi-stage impedance matching 有权
标题翻译：多级阻抗匹配
公开(公告)号：US08536950B2
公开(公告)日：2013-09-17
申请号：US12641228
申请日：2009-12-17
申请人： Babak Nejati , Yu Zhao , Nathan M Pletcher , Aristotele Hadjichristos , Puay Hoe See
发明人： Babak Nejati , Yu Zhao , Nathan M Pletcher , Aristotele Hadjichristos , Puay Hoe See
IPC分类号： H03F3/04
CPC分类号： H03F1/565 , H03F3/211 , H03F3/72
摘要： Exemplary techniques for performing impedance matching are described. In an exemplary embodiment, the apparatus may include an amplifier (e.g., a power amplifier) coupled to first and second matching circuits. The first matching circuit may include multiple stages coupled to a first node and may provide input impedance matching for the amplifier. The second matching circuit may include multiple stages coupled to a second node and may provide output impedance matching for the amplifier. At least one switch may be coupled between the first and second nodes and may bypass or select the amplifier. The first and second nodes may have a common impedance. The apparatus may further include a second amplifier coupled in parallel with the amplifier and further to the matching circuits. The second matching circuit may include a first input stage coupled to the amplifier, a second input stage coupled to the second amplifier, and a second stage coupled to the two input stages via switches.
摘要翻译：描述了用于执行阻抗匹配的示例性技术。在示例性实施例中，该装置可以包括耦合到第一和第二匹配电路的放大器（例如，功率放大器）。第一匹配电路可以包括耦合到第一节点的多个级并且可以为放大器提供输入阻抗匹配。第二匹配电路可以包括耦合到第二节点的多个级并且可以为放大器提供输出阻抗匹配。至少一个开关可以耦合在第一和第二节点之间，并且可以旁路或选择放大器。第一和第二节点可以具有公共阻抗。该装置还可以包括与放大器并联并且进一步耦合到匹配电路的第二放大器。第二匹配电路可以包括耦合到放大器的第一输入级，耦合到第二放大器的第二输入级，以及经由开关耦合到两个输入级的第二级。

10. 发明授权

US08102205B2 Amplifier module with multiple operating modes 有权
标题翻译：具有多种工作模式的放大器模块
公开(公告)号：US08102205B2
公开(公告)日：2012-01-24
申请号：US12757679
申请日：2010-04-09
申请人： Nathan M Pletcher , Aristotele Hadjichristos , Babak Nejati
发明人： Nathan M Pletcher , Aristotele Hadjichristos , Babak Nejati
IPC分类号： H03F1/14
CPC分类号： H03F1/0277 , H03F1/56 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/222 , H03F2200/27 , H03F2200/318 , H03F2200/387 , H03F2200/411 , H03F2200/451 , H03F2200/522 , H03F2200/75 , H03F2203/21136 , H03F2203/21139 , H03F2203/21142 , H03F2203/21157 , H03F2203/21175 , H03F2203/21196 , H03F2203/7206 , H03F2203/7236 , H03G1/0088
摘要： An amplifier module with multiple operating modes is described. In an exemplary design, the amplifier module includes an amplifier (e.g., a power amplifier), a switch, and an output circuit. The amplifier receives and amplifies an input signal and provides an amplified signal in a first mode. The switch is coupled to the output of the amplifier and bypasses the amplifier and provides a bypass signal in a second mode. The output circuit is coupled to the amplifier and the switch. The output circuit performs output impedance matching for the amplifier in the first mode. The output circuit also (i) receives the amplified signal and provides an output signal in the first mode and (ii) receives the bypass signal and provides the output signal in the second mode. The amplifier is enabled in the first mode and disabled in the second mode.
摘要翻译：描述具有多种工作模式的放大器模块。在示例性设计中，放大器模块包括放大器（例如，功率放大器），开关和输出电路。放大器接收并放大输入信号并在第一模式中提供放大的信号。开关耦合到放大器的输出端，并且旁路放大器并在第二模式中提供旁路信号。输出电路耦合到放大器和开关。输出电路在第一模式下对放大器执行输出阻抗匹配。输出电路还（i）接收放大的信号并在第一模式中提供输出信号，并且（ii）接收旁路信号并在第二模式中提供输出信号。放大器在第一种模式下使能，在第二种模式下禁用。

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