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1. 发明授权

US07333778B2 System and method for current-mode amplitude modulation 有权
标题翻译：电流模式幅度调制的系统和方法
公开(公告)号：US07333778B2
公开(公告)日：2008-02-19
申请号：US10889567
申请日：2004-07-12
申请人： David R. Pehlke , Aristotele Hadjichristos
发明人： David R. Pehlke , Aristotele Hadjichristos
IPC分类号： H04B1/04 , H03F3/38
CPC分类号： H03C1/06 , H03C5/00 , H03F1/02 , H03F1/0222 , H03F1/0261 , H03F1/32 , H03F3/24 , H03F2200/324 , H03F2200/456 , H03F2200/504 , H04B1/04 , H04B1/0483 , H04B2001/045 , H04B2001/0491
摘要： An amplifier circuit includes a power amplifier biased for saturated mode operation, and a controllable current source to provide supply current to the power amplifier. The controllable current source effects desired amplitude modulation of the output signal from the power amplifier by modulating the supply current it provides responsive to an amplitude information signal. In one or more embodiments, the current source includes a circuit that is configured to adjust one or more transmitter operating parameters responsive to detecting changes in the effective DC resistance of the power amplifier. For example, the circuit may generate a compensation signal that reduces the effective DC resistance responsive to detecting that the effective DC resistance has undesirably increased. By way of non-limiting examples, such compensation may be effected by changing a current mirror, an amplifier-to-antenna impedance matching, an amplifier bias or device size, or imposing some form of transmit signal back-off.
摘要翻译：放大器电路包括偏置用于饱和模式操作的功率放大器和可控电流源，以向功率放大器提供电源电流。可控电流源通过调制其响应于幅度信息信号提供的电源电流来影响来自功率放大器的输出信号的期望幅度调制。在一个或多个实施例中，电流源包括被配置为响应于检测功率放大器的有效直流电阻的变化来调整一个或多个发射器操作参数的电路。例如，电路可以响应于检测到有效DC电阻不期望地增加而产生降低有效DC电阻的补偿信号。作为非限制性示例，可以通过改变电流镜，放大器到天线阻抗匹配，放大器偏置或器件尺寸或者施加某种形式的发射信号反馈来实现这种补偿。

2. 发明授权

US06738432B2 System and method for RF signal amplification 有权
标题翻译： RF信号放大的系统和方法
公开(公告)号：US06738432B2
公开(公告)日：2004-05-18
申请号：US09813741
申请日：2001-03-21
申请人： David R. Pehlke , Aristotele Hadjichristos
发明人： David R. Pehlke , Aristotele Hadjichristos
IPC分类号： H04L2704
CPC分类号： H03F1/0222 , H03F1/0277 , H03F2200/331 , H03F2200/504
摘要： A branched power amplifier circuit includes two or more amplifier segments or branches, each with a corresponding lossy modulator. The branched power amplifier may be dynamically resized by enabling different ones of its branches, to deliver peak efficiency at a number of different amplifier output power levels. Each amplifier branch operates in a saturated mode and selectively amplifies an RF input signal. The lossy modulators provide either supply voltage or supply current modulation to corresponding amplifier branches, thus imparting highly linear amplitude modulation to the overall output signal generated by branched power amplifier, despite its saturated mode operation. The branched power amplifier circuit may be configured such that particular combinations of segments have peak efficiencies matched to the needs of one or more air interface standards used in wireless mobile communication systems.
摘要翻译：分支功率放大器电路包括两个或更多个放大器段或分支，每个具有相应的有损调制器。分支功率放大器可以通过使其不同的分支动态地调整大小，以在多个不同的放大器输出功率电平上提供峰值效率。每个放大器分支工作在饱和模式，并有选择地放大RF输入信号。有损调制器为相应的放大器分支提供电源电压或电源电流调制，从而对分支功率放大器产生的总体输出信号赋予高度线性的幅度调制，尽管其饱和模式操作。分支功率放大器电路可以被配置为使得段的特定组合具有与在无线移动通信系统中使用的一个或多个空中接口标准的需要相匹配的峰值效率。

3. 发明授权

US07023292B2 Polar modulation using amplitude modulated quadrature signals 有权
标题翻译：使用幅度调制正交信号进行极坐标调制
公开(公告)号：US07023292B2
公开(公告)日：2006-04-04
申请号：US10738268
申请日：2003-12-17
申请人： David R. Pehlke , Aristotele Hadjichristos
发明人： David R. Pehlke , Aristotele Hadjichristos
IPC分类号： H03C1/00 , H03C3/00 , H03C5/00
CPC分类号： H04L27/362 , H04L27/361
摘要： Polar modulators include a phase splitter, a controller, variable current sources, transistor circuits, and a combiner. The phase splitter splits a RF carrier signal into quadrature component signals that are 90 degrees out of phase with each other. The controller generates modulation control signals based on information that is to be transmitted. The variable current sources each generate a variable amplitude current signal based on a different one of the modulation control signals. Each of the transistor circuits amplify a different one of the quadrature component signals with a variable amplification based on the variable amplitude current signal from a different one of the variable current sources to generate an amplitude adjusted quadrature component signal. The combiner combines the amplitude adjusted quadrature component signals from each of the transistor circuits to generate a phase-modulated RF carrier output signal.
摘要翻译：极性调制器包括分相器，控制器，可变电流源，晶体管电路和组合器。相位分离器将RF载波信号分离成彼此相差90度的正交分量信号。控制器根据要发送的信息产生调制控制信号。可变电流源各自基于不同的调制控制信号产生可变幅度电流信号。每个晶体管电路基于来自不同的可变电流源的可变幅度电流信号，用可变放大放大不同的正交分量信号，以产生振幅调整的正交分量信号。组合器组合来自每个晶体管电路的幅度调整的正交分量信号以产生相位调制的RF载波输出信号。

4. 发明授权

US06785521B2 System and method for current-mode amplitude modulation 有权
标题翻译：电流模式幅度调制的系统和方法
公开(公告)号：US06785521B2
公开(公告)日：2004-08-31
申请号：US09813593
申请日：2001-03-21
申请人： Aristotele Hadjichristos , David R. Pehlke
发明人： Aristotele Hadjichristos , David R. Pehlke
IPC分类号： H03C152
CPC分类号： H03F1/0261 , H03F2200/504 , H04B1/04 , H04B2001/0491
摘要： An amplifier circuit includes a power amplifier biased for saturated mode operation, and a controllable current source to provide supply current to the power amplifier. The controllable current source effects desired amplitude modulation of the output signal from the power amplifier by modulating the supply current it provides responsive to an amplitude information signal.
摘要翻译：放大器电路包括偏置用于饱和模式操作的功率放大器和可控电流源，以向功率放大器提供电源电流。可控电流源通过调制其响应于幅度信息信号提供的电源电流来影响来自功率放大器的输出信号的期望幅度调制。

5. 发明授权

US06566944B1 Current modulator with dynamic amplifier impedance compensation 有权
标题翻译：具有动态放大器阻抗补偿的电流调制器
公开(公告)号：US06566944B1
公开(公告)日：2003-05-20
申请号：US10080239
申请日：2002-02-21
申请人： David R. Pehlke , Aristotele Hadjichristos , William O. Camp, Jr.
发明人： David R. Pehlke , Aristotele Hadjichristos , William O. Camp, Jr.
IPC分类号： H03F338
CPC分类号： H03G3/3047 , H03F1/0233 , H03F1/0272 , H03F1/56 , H03F2200/504 , H03G3/004 , H03G3/3042
摘要： An amplitude modulation circuit (modulator) provides modulated supply current, possibly in combination with modulated supply voltage, to a radio frequency (RF) power amplifier (PA), and includes a detection circuit responsive to changes in the ratio of that voltage to the modulated supply current, described herein as its AM modulation impedance. Such impedance (resistance) changes commonly arise from changing coupling characteristics at the RF antenna assembly driven by the PA. A gain control circuit may be associated with the detection circuit, and made responsive thereto, thus allowing adjustment of modulation gain control responsive to changes in PA AM modulation impedance. In one embodiment, this arrangement permits the modulator to hold a fixed modulation gain over changing PA AM modulation impedance, while in other embodiments, modulation gain varies in response to PA impedance changes to avoid signal clipping. Such clipping might otherwise occur where current modulation values in combination with increased PA resistance would result in PA voltages exceeding the supply voltage of the PA.
摘要翻译：幅度调制电路（调制器）将调制的电源电流（可能与调制的电源电压组合）提供给射频（RF）功率放大器（PA），并且包括响应于该电压与调制的电源电流，这里描述为其AM调制阻抗。这种阻抗（电阻）变化通常来自于由PA驱动的RF天线组件处的耦合特性的改变。增益控制电路可以与检测电路相关联，并对其进行响应，从而允许响应于PA AM调制阻抗的变化来调整调制增益控制。在一个实施例中，这种布置允许调制器在改变PA AM调制阻抗的情况下保持固定的调制增益，而在其他实施例中，调制增益响应于PA阻抗变化而变化以避免信号限幅。否则可能发生这种削波，其中当前调制值与增加的PA电阻相结合将导致PA电压超过PA的电源电压。

6. 发明授权

US09000847B2 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：US09000847B2
公开(公告)日：2015-04-07
申请号：US13226397
申请日：2011-09-06
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 , H03H7/40 , H03F1/22 , H03F1/42 , H03F3/193
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 comprises a driver amplifier and a power amplifier. The apparatus may further include an inter-stage matching circuit tunable in discrete steps for matching impedances between the driver amplifier and the power amplifier. The tunable inter-stage matching circuit may include a bank of capacitors, each capacitor of the bank coupled in series with a switch for coupling the capacitor to a ground voltage.
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，装置包括驱动器放大器和功率放大器。该装置还可以包括可以在离散步骤中调节的级间匹配电路，用于匹配驱动器放大器和功率放大器之间的阻抗。可调谐级间匹配电路可以包括一组电容器，该组的每个电容器与用于将电容器耦合到接地电压的开关串联耦合。

7. 发明授权

US08633777B2 Methods and apparatus for inductors with integrated passive and active elements 有权
标题翻译：具有集成无源和有源元件的电感器的方法和装置
公开(公告)号：US08633777B2
公开(公告)日：2014-01-21
申请号：US12628502
申请日：2009-12-01
申请人： Zhang Jin , Aristotele Hadjichristos , Ockgoo Lee , Hongyan Yan , Guy Klemens , Maulin P. Bhagat , Thomas Myers , Norman L. Frederick , Junxiong Deng , Aleksandar Tasic , Bhushan S. Asuri , Mohammad Farazian
发明人： Zhang Jin , Aristotele Hadjichristos , Ockgoo Lee , Hongyan Yan , Guy Klemens , Maulin P. Bhagat , Thomas Myers , Norman L. Frederick , Junxiong Deng , Aleksandar Tasic , Bhushan S. Asuri , Mohammad Farazian
IPC分类号： H03B1/00
CPC分类号： H01L25/16 , H01F17/0006 , H01F27/40 , H01L23/645 , H01L2924/0002 , H01L2924/00
摘要： An integrated circuit is described. The integrated circuit includes an inductor that has a large empty area in the center of the inductor. The integrated circuit also includes additional circuitry. The additional circuitry is located within the large empty area in the center of the inductor. The additional circuitry may include a capacitor bank, transistors, electrostatic discharge (ESD) protection circuitry and other miscellaneous passive or active circuits.
摘要翻译：描述了集成电路。集成电路包括在电感器中心具有大的空白区域的电感器。集成电路还包括附加电路。附加电路位于电感器中心的大空区域内。附加电路可以包括电容器组，晶体管，静电放电（ESD）保护电路和其它各种无源或有源电路。

8. 发明申请

US20110316637A1 AMPLIFIER MODULE WITH MULTIPLE OPERATING MODES 有权
标题翻译：具有多种操作模式的放大器模块
公开(公告)号：US20110316637A1
公开(公告)日：2011-12-29
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： H03F3/04
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。

9. 发明申请

US20110316636A1 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：US20110316636A1
公开(公告)日：2011-12-29
申请号：US13226397
申请日：2011-09-06
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： H03H11/28 , 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 comprises a driver amplifier and a power amplifier. The apparatus may further include an inter-stage matching circuit tunable in discrete steps for matching impedances between the driver amplifier and the power amplifier. The tunable inter-stage matching circuit may include a bank of capacitors, each capacitor of the bank coupled in series with a switch for coupling the capacitor to a ground voltage.
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，装置包括驱动器放大器和功率放大器。该装置还可以包括可以在离散步骤中调节的级间匹配电路，用于匹配驱动器放大器和功率放大器之间的阻抗。可调谐级间匹配电路可以包括一组电容器，该组的每个电容器与用于将电容器耦合到接地电压的开关串联耦合。

10. 发明申请

US20110037516A1 MULTI-STAGE IMPEDANCE MATCHING 有权
标题翻译：多级阻抗匹配
公开(公告)号：US20110037516A1
公开(公告)日：2011-02-17
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： H03F3/68
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。

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