公开(公告)号：US07471155B1

公开(公告)日：2008-12-30

申请号：US11753888

申请日：2007-05-25

Applicant: Chris Levesque

Inventor： Chris Levesque

IPC: H03F3/04

CPC classification number: H03F1/30 ,  H02M3/155 ,  H03F2200/459 ,  H03F2200/504

Abstract: The present invention is ripple cancellation circuitry used with a switching power supply, which provides direct current (DC) power via a DC power amplifier (PA) signal to an RF PA final stage. The DC PA signal includes a DC component and a power supply ripple component, which is generated as a result of the switching characteristics of the switching power supply and creates an output ripple in an RF output signal from the PA final stage. The ripple cancellation circuitry substantially cancels the output ripple by adding a ripple cancellation signal having a ripple component that is phase-shifted approximately 180 degrees from the output ripple to the RF output signal. The ripple cancellation circuitry uses a switching signal that is provided by the switching power supply to generate the ripple cancellation signal.

Abstract translation: 本发明是与开关电源一起使用的纹波消除电路，其通过DC功率放大器（PA）信号向RF PA最终级提供直流（DC）功率。 DC PA信号包括作为开关电源的开关特性的结果产生的DC分量和电源纹波分量，并且在来自PA最终级的R​​F输出信号中产生输出纹波。 纹波消除电路基本上通过将具有从输出纹波相移大约180度的纹波分量的纹波消除信号加到RF输出信号来抵消输出纹波。 纹波消除电路使用由开关电源提供的开关信号来产生纹波消除信号。

公开(公告)号：US07459988B1

公开(公告)日：2008-12-02

申请号：US11532725

申请日：2006-09-18

Applicant: Christian Rye Iversen

Inventor： Christian Rye Iversen

IPC: H01P1/10

CPC classification number: H01P1/15

Abstract: The present invention is a wide dynamic range antenna switch that, when disabled, has a stable input impedance over a wide power range. The wide dynamic range antenna switch includes multiple transistors, which are coupled in series, to provide a main signal path between an antenna connection and a radio connection. Direct current (DC) bias signals are provided to each of the transistors to ensure than when the antenna switch is disabled, the input impedance is stable. A control input, which may operate with low voltage control signals, enables or disables the antenna switch. The antenna switch may be coupled with other antenna switches in a communications system with multiple transceivers sharing a common antenna, and with a wide range of transmitter output power levels. Different embodiments of the present invention provide different DC bias circuit architectures.

Abstract translation: 本发明是一种宽动态范围天线开关，其在禁用时在宽功率范围内具有稳定的输入阻抗。 宽动态范围天线开关包括串联耦合的多个晶体管，以在天线连接和无线电连接之间提供主信号路径。 直流（DC）偏置信号被提供给每个晶体管，以确保比天线开关禁用时输入阻抗稳定。 可以使用低电压控制信号操作的控制输入启用或禁用天线开关。 天线开关可以与具有共享共同天线的多个收发器以及广泛的发射机输出功率电平的通信系统中的其它天线开关耦合。 本发明的不同实施例提供不同的直流偏置电路架构。

公开(公告)号：US07412215B1

公开(公告)日：2008-08-12

申请号：US11144119

申请日：2005-06-03

Applicant: Alexander Wayne Hietala ,  Jeffery Peter Ortiz ,  Scott Robert Humphreys

Inventor： Alexander Wayne Hietala ,  Jeffery Peter Ortiz ,  Scott Robert Humphreys

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03L7/081 ,  H03L7/087 ,  H03L7/16 ,  H03L2207/12

Abstract: A system and method are provided for switching from one phase-locked loop feedback source to another in a radio frequency (RF) transmitter. The RF transmitter includes a phase-locked loop (PLL) that provides a phase-modulated RF input signal and power amplifier circuitry that amplifies the RF input signal to provide an RF output signal. The PLL includes switching circuitry that couples a feedback path of the PLL to an output of the PLL for open loop operation and couples the feedback path of the PLL to an output of the power amplifier circuitry for closed loop operation. Prior to switching the feedback path from the output of the PLL to the output of the power amplifier circuitry, time alignment circuitry operates to time-align feedback signals from the outputs of the PLL and the power amplifier circuitry such that switching from open loop operation to closed loop operation causes minimal phase disturbance.

Abstract translation: 提供了一种用于在射频（RF）发射机中从一个锁相环反馈源切换到另一个的系统和方法。 RF发射器包括提供相位调制RF输入信号的锁相环（PLL）和放大RF输入信号以提供RF输出信号的功率放大器电路。 PLL包括将PLL的反馈路径耦合到PLL的输出以用于开环操作的开关电路，并将PLL的反馈路径耦合到用于闭环操作的功率放大器电路的输出。 在将反馈路径从PLL的输出切换到功率放大器电路的输出之前，时间对准电路用于对来自PLL和功率放大器电路的输出的反馈信号进行时间对准，使得从开环操作切换到 闭环运行导致最小的相位扰动。

公开(公告)号：US07372326B1

公开(公告)日：2008-05-13

申请号：US11549011

申请日：2006-10-12

Applicant: Edward T. Spears ,  Douglas A. Teeter ,  Hien D. Bui

Inventor： Edward T. Spears ,  Douglas A. Teeter ,  Hien D. Bui

IPC: H03F1/14

CPC classification number: H03F1/0277

Abstract: The present invention is a parallel RF amplifier circuit that selects between a high power side (HPS) and a low power side (LPS), depending upon output power. A chain matching network couples an LPS output to an HPS output for improved efficiency at lower output power. When the HPS is selected, the LPS output is disabled, and when the LPS is selected, the HPS output is disabled When the HPS is selected, large signal voltage swings from the collector of the HPS amplifier may be multiplied through the chain matching network, and may cause negative voltage swings at the LPS collector, which may degrade linearity and efficiency of the HPS amplifier by driving currents into the disabled LPS amplifier. Therefore, the present invention includes LPS bias circuitry to minimize impacts of negative voltage swings at the LPS output.

Abstract translation: 本发明是根据输出功率在大功率侧（HPS）和低功率侧（LPS）之间进行选择的并行RF放大电路。 链匹配网络将LPS输出耦合到HPS输出，以在更低的输出功率下提高效率。 当选择HPS时，LPS输出被禁止，当选择LPS时，HPS输出被禁用当选择HPS时，来自HPS放大器的集电极的大的信号电压摆幅可以通过链匹配网络相乘， 并且可能在LPS集电极处引起负电压摆幅，这可能通过驱动电流进入禁用的LPS放大器来降低HPS放大器的线性度和效率。 因此，本发明包括LPS偏压电路，以最小化LPS输出处的负电压摆幅的影响。

公开(公告)号：US07336127B2

公开(公告)日：2008-02-26

申请号：US11149682

申请日：2005-06-10

Applicant: Wayne Kennan

Inventor： Wayne Kennan

IPC: H03F3/68

CPC classification number: H03F3/72 ,  H03F1/0211 ,  H03F1/0277 ,  H03F1/0288 ,  H03F3/24 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/516 ,  H03F2203/7227

Abstract: An efficient power amplifier circuitry for a mobile terminal or similar wireless communication device is provided. The power amplifier circuitry includes an output stage configured as a collector controlled Doherty amplifier, wherein the collector controlled Doherty amplifier increases the efficiency of the power amplifier at backoff power levels. The output stage includes main and peaking amplifiers connected in parallel and operating 90 degrees out-of-phase. The main amplifier is controlled using a first variable supply voltage, and the peaking amplifier is controlled using a second variable supply voltage. The first and second variable supply voltages are provided such that the main amplifier is active and the peaking amplifier is inactive for output power levels less than a predetermined backoff from a maximum output power level, and both the main amplifier and peaking amplifiers are active and operating in concert for output power levels greater than the predetermined backoff.

Abstract translation: 提供了一种用于移动终端或类似无线通信设备的高效功率放大器电路。 功率放大器电路包括被配置为收集器控制的Doherty放大器的输出级，其中集电极控制的Doherty放大器在退避功率电平下增加功率放大器的效率。 输出级包括并联连接的主峰值和峰值放大器，工作在90度以外的相位。 使用第一可变电源电压来控制主放大器，并且使用第二可变电源电压来控制峰值放大器。 提供第一和第二可变电源电压，使得主放大器是有效的，并且峰化放大器对于从最大输出功率电平小于预定退避的输出功率电平是无效的，并且主放大器和峰值放大器都是有效的和操作的 一致地输出功率水平大于预定的退避。

公开(公告)号：US07330071B1

公开(公告)日：2008-02-12

申请号：US11253321

申请日：2005-10-19

Applicant: David Dening ,  Kathleen Muhonen

Inventor： David Dening ,  Kathleen Muhonen

IPC: H03G3/20

CPC classification number: H03F3/602 ,  H03F1/0288 ,  H03F1/0294 ,  H03F2200/387 ,  H03F2200/423 ,  H03F2200/451

Abstract: A system and method are provided for efficiently amplifying a radio frequency signal. In general, the system includes power amplifier circuitry that efficiently amplifies an input signal under power back-off conditions. In one embodiment, the power amplifier circuitry has an efficiency of at least 30% at a 6 dB back-off point. In addition, DC-DC conversion circuitry operates to control a variable supply voltage provided to the power amplifier circuitry, thereby controlling an output power level, or average output power, of the power amplifier circuitry.

Abstract translation: 提供了一种用于有效地放大射频信号的系统和方法。 通常，该系统包括在功率回退条件下有效地放大输入信号的功率放大器电路。 在一个实施例中，功率放大器电路在6dB回退点处具有至少30％的效率。 此外，DC-DC转换电路用于控制提供给功率放大器电路的可变电源电压，从而控制功率放大器电路的输出功率电平或平均输出功率。

公开(公告)号：US07313376B1

公开(公告)日：2007-12-25

申请号：US10987883

申请日：2004-11-12

Applicant: Alexander Wayne Hietala

Inventor： Alexander Wayne Hietala

IPC: H04B1/06

CPC classification number: H04B1/30

Abstract: A system and method for performing DC offset correction in a wireless communication receiver during “dead time” are provided. The receiver includes amplifier circuitry that amplifies a received radio frequency (RF) signal, downconversion circuitry that downconverts the received RF signal to provide a downconverted signal, digitization circuitry that digitizes the downconverted signal to provide a digital signal, and digital DC offset correction circuitry enabled during the dead time when there should be no DC content in the downconverted signal. In operation, the digital DC offset correction circuitry detects a DC offset of the digital signal and subtracts the DC offset from the digital signal.

Abstract translation: 提供了在“死区时间”期间在无线通信接收机中进行DC偏移校正的系统和方法。 接收器包括放大接收的射频（RF）信号的放大器电路，降频所接收的RF信号以提供下变频信号的下变频电路，使下变频信号数字化以提供数字信号的数字化电路和启用的数字DC偏移校正电路 在死区时间内，在下变频信号中不应有直流含量。 在操作中，数字DC偏移校正电路检测数字信号的DC偏移，并从数字信号中减去DC偏移。

公开(公告)号：US07301400B1

公开(公告)日：2007-11-27

申请号：US10858699

申请日：2004-06-02

Applicant: David Dening

Inventor： David Dening

IPC: H03F3/04

CPC classification number: H03F1/0227

Abstract: A mobile terminal including a multi-phase DC-DC converter for controlling a supply voltage provided to a power amplifier in the transmit chain. In general, the multi-phase DC-DC converter includes a multi-phase converter control system and a multi-phase power train. The multi-phase converter control system generates a plurality of control signals based on a set-point voltage and a supply voltage at the output of the multi-phase DC-DC converter. The plurality of control signals are provided to the multi-phase control system which generates a plurality of currents each based on a corresponding one of the plurality of control signals. The plurality of currents charge an output capacitor such that an average voltage across the output capacitor is the desired supply voltage.

Abstract translation: 一种移动终端，包括用于控制提供给发射链中的功率放大器的电源电压的多相DC-DC转换器。 通常，多相DC-DC转换器包括多相转换器控制系统和多相传动系。 多相转换器控制系统基于多相DC-DC转换器的输出端的设定点电压和电源电压产生多个控制信号。 多个控制信号被提供给多相控制系统，该多相控制系统基于多个控制信号中的相应一个产生多个电流。 多个电流对输出电容器充电，使得输出电容器两端的平均电压为期望的电源电压。

公开(公告)号：US07301398B1

公开(公告)日：2007-11-27

申请号：US11384459

申请日：2006-03-20

Applicant: Stephen Allott ,  Mark Alexander John Moffat

Inventor： Stephen Allott ,  Mark Alexander John Moffat

IPC: H03F3/45

CPC classification number: H03F1/3211 ,  H03F1/26 ,  H03F3/45183 ,  H03F3/72 ,  H03F2203/45201 ,  H03F2203/45318 ,  H03F2203/45384 ,  H03F2203/45392 ,  H03F2203/45506 ,  H03F2203/45564 ,  H03F2203/7203

Abstract: The present invention is a differential transconductance amplifier circuit that includes matched cross-coupled transconductance elements connected such that the differential gain of the amplifier is determined by only passive elements. By virtually eliminating the effects of active elements on the amplifier gain, the amplifier operates in a very linear manner over its entire operating range. Power consumption, amplifier noise level, and dynamic range can be optimized with appropriate selection of the passive elements that determine amplifier gain.

Abstract translation: 本发明是一种差分跨导放大器电路，其包括连接的匹配的交叉耦合跨导元件，使得放大器的差分增益仅由无源元件确定。 通过实际消除有源元件对放大器增益的影响，放大器在整个工作范围内以非常线性的方式工作。 可以通过适当选择确定放大器增益的无源元件来优化功耗，放大器噪声电平和动态范围。

公开(公告)号：US07288999B1

公开(公告)日：2007-10-30

申请号：US11347956

申请日：2006-02-06

Applicant: Alexander Wayne Hietala ,  Ryan Lee Bunch ,  Scott Robert Humphreys ,  Barry Travis Hunt, Jr.

Inventor： Alexander Wayne Hietala ,  Ryan Lee Bunch ,  Scott Robert Humphreys ,  Barry Travis Hunt, Jr.

IPC: H03L7/197 ,  H04L25/49

CPC classification number: H03L7/1976 ,  H03C3/0966 ,  H03L7/23 ,  H03L2207/12

Abstract: A system providing a phase or frequency modulated signal is provided. In general, the system includes a phase locked loop (PLL) having a fractional-N divider in a reference path of the PLL operating to divide a reference frequency based on a pre-distorted modulation signal. Pre-distortion circuitry operates to provide the pre-distorted modulation signal by pre-distorting a modulation signal such that a convolution, or cascade, of the pre-distortion and a transfer function of the PLL results in a substantially flat frequency response for a range of modulation rates greater than a bandwidth of the PLL.

Abstract translation: 提供了提供相位或频率调制信号的系统。 通常，该系统包括在PLL的参考路径中具有分数N分频器的锁相环（PLL），其操作以基于预失真调制信号来划分参考频率。 预失真电路通过对调制信号进行预失真来提供预失真调制信号，使得预失真和PLL的传递函数的卷积或级联导致范围内的基本平坦的频率响应 的调制率大于PLL的带宽。