公开(公告)号：US06580321B1

公开(公告)日：2003-06-17

申请号：US09939183

申请日：2001-08-24

申请人： Thomas William Arell ,  Henry Liwinski ,  Joel Morison Lott ,  Osvaldo J. Lopez

发明人： Thomas William Arell ,  Henry Liwinski ,  Joel Morison Lott ,  Osvaldo J. Lopez

IPC分类号： H03F304

CPC分类号： H03F1/52 ,  H03F3/191

摘要： An active clamping circuit for a multi-stage power amplifier includes a feedback circuit which affects the gain of the amplifier. The feedback circuit feeds an output via a filter and a clamping transistor to an input of at least one stage of the power amplifier. The output fed to the filter and clamping transistor may be tapped from one or more diodes belonging to a diode stack connected to the power amplifier's output.

摘要翻译： 用于多级功率放大器的有源钳位电路包括影响放大器增益的反馈电路。 反馈电路通过滤波器和钳位晶体管将输出馈送到功率放大器的至少一级的输入端。 馈送到滤波器和钳位晶体管的输出可以从属于连接到功率放大器的输出的二极管堆叠的一个或多个二极管抽头。

公开(公告)号：US07852172B2

公开(公告)日：2010-12-14

申请号：US12218912

申请日：2008-07-18

申请人： Thomas William Arell ,  Henry Z Liwinski

发明人： Thomas William Arell ,  Henry Z Liwinski

IPC分类号： H01P1/10 ,  H01P1/15

CPC分类号： H03K17/693 ,  H03K17/165 ,  H03K2217/0036 ,  H03K2217/0054

摘要： A low-loss Radio Frequency (RF) switch for high-power RF signals. The RF switch includes a first-biasing circuit connected to a first transistor and a second-biasing circuit connected to a second transistor. The RF switch switches its output signal between a first input signal and a second input signal. The first transistor is in a conduction state and the second transistor is in a non-conduction state when the first input signal is to be conducted to the output signal. The first-biasing circuit biases the first transistor at a first voltage for increasing conduction of the first input signal and the second-biasing circuit biases the second transistor at a second voltage for decreasing conduction of the first input signal. Moreover, the second transistor is in a conduction state and the first transistor is in a non-conduction state when the second input signal is to be conducted to the output signal.

公开(公告)号：US20100013571A1

公开(公告)日：2010-01-21

申请号：US12218912

申请日：2008-07-18

申请人： Thomas William Arell ,  Henry Z. Liwinski

发明人： Thomas William Arell ,  Henry Z. Liwinski

IPC分类号： H01P1/15

CPC分类号： H03K17/693 ,  H03K17/165 ,  H03K2217/0036 ,  H03K2217/0054

摘要： A low-loss Radio Frequency (RF) switch for high-power RF signals. The RF switch includes a first-biasing circuit connected to a first transistor and a second-biasing circuit connected to a second transistor. The RF switch switches its output signal between a first input signal and a second input signal. The first transistor is in a conduction state and the second transistor is in a non-conduction state when the first input signal is to be conducted to the output signal. The first-biasing circuit biases the first transistor at a first voltage for increasing conduction of the first input signal and the second-biasing circuit biases the second transistor at a second voltage for decreasing conduction of the first input signal. Moreover, the second transistor is in a conduction state and the first transistor is in a non-conduction state when the second input signal is to be conducted to the output signal.

摘要翻译： 用于高功率RF信号的低损耗射频（RF）开关。 RF开关包括连接到第一晶体管的第一偏置电路和连接到第二晶体管的第二偏置电路。 RF开关在第一输入信号和第二输入信号之间切换其输出信号。 当第一输入信号被传导到输出信号时，第一晶体管处于导通状态，第二晶体管处于非导通状态。 第一偏置电路以第一电压偏置第一晶体管以增加第一输入信号的导通，而第二偏置电路以第二电压偏压第二晶体管，以减小第一输入信号的导通。 此外，第二晶体管处于导通状态，并且当第二输入信号要被传导到输出信号时，第一晶体管处于非导通状态。

公开(公告)号：US07248111B1

公开(公告)日：2007-07-24

申请号：US11106254

申请日：2005-04-14

申请人： Sheldon Xu ,  Thomas William Arell ,  Mahendra Singh ,  Mohammed Ali Khatibzadeh

发明人： Sheldon Xu ,  Thomas William Arell ,  Mahendra Singh ,  Mohammed Ali Khatibzadeh

IPC分类号： H03G5/16

CPC分类号： H03G1/0088 ,  H03F1/0205 ,  H03F1/0261 ,  H03F1/302 ,  H03F3/191 ,  H03F3/343 ,  H03F2200/18 ,  H03F2200/222 ,  H03F2200/318 ,  H03F2200/387 ,  H03F2200/411 ,  H03G3/3047

摘要： A power amplifier with a multi-mode digital bias control circuit is provided. The power amplifier utilizes a complementary reference voltage generation circuit and a bias current-control circuit to generate a plurality of bias current levels for different output power levels. In an embodiment of the present invention, the power amplifier circuit is connected to a reference voltage and two control signals. Depending on the desired output power level, the control signals set the corresponding bias current in the amplifying transistors, to ensure sufficient linearity. The power amplifier is capable of operating at a very low quiescent current level, for example, 5 mA. As a result, a significant improvement in the power amplifier's overall efficiency is achieved, and the battery talk time of a wireless communication device is increased. The invention finds application in wireless communication devices such as CDMA, WCDMA, EDGE and WLAN mobile devices.

摘要翻译： 提供了具有多模数字偏置控制电路的功率放大器。 功率放大器利用互补参考电压产生电路和偏置电流控制电路来产生用于不同输出功率电平的多个偏置电流电平。 在本发明的实施例中，功率放大器电路连接到参考电压和两个控制信号。 根据期望的输出功率电平，控制信号在放大晶体管中设置相应的偏置电流，以确保足够的线性度。 功率放大器能够以非常低的静态电流电平工作，例如5 mA。 结果，实现了功率放大器的整体效率的显着改善，并且增加了无线通信设备的电池通话时间。 本发明应用于诸如CDMA，WCDMA，EDGE和WLAN移动设备的无线通信设备中。

公开(公告)号：US6016076A

公开(公告)日：2000-01-18

申请号：US92323

申请日：1998-06-05

申请人： Thomas William Arell

发明人： Thomas William Arell

IPC分类号： H03F1/32 ,  H03F1/26

CPC分类号： H03F1/3276

摘要： A predistorter linearizer includes a magnitude distorter and a phase distorter, each including variability to provide a desired magnitude characteristic and phase characteristic. The method comprises adjusting a circuit to provide a desired magnitude characteristic and adjusting the circuit to provide a desired phase characteristic. A signal is modified using the desired magnitude and phase characteristics to produce a signal for amplification. The modification of the signal is offset by any modification resulting from the amplification, resulting in a more linearized amplifier output.

摘要翻译： 预失真器线性化装置包括幅度变差器和相位变形器，每个变化器包括提供期望的幅度特性和相位特性的变化。 该方法包括调整电路以提供期望的幅度特性并调整电路以提供期望的相位特性。 使用期望的幅度和相位特性修改信号以产生用于放大的信号。 通过由放大产生的任何修改来抵消信号的修改，导致更线性化的放大器输出。