Multi-mode power amplifier
    1.
    发明授权
    Multi-mode power amplifier 失效
    多模功率放大器

    公开(公告)号:US5541554A

    公开(公告)日:1996-07-30

    申请号:US399019

    申请日:1995-03-06

    摘要: An amplifier (100) has first and second operation modes. The amplifier (100) includes an amplifier input portion (110) and an amplification gain stage. The amplification stage has two gain paths (120, 140) coupled in parallel to the amplifier input portion (110). At least one of the gain paths (120) has an amplification component (121) that in part forms a switch to select between the first and second operation modes.

    摘要翻译: 放大器(100)具有第一和第二操作模式。 放大器(100)包括放大器输入部分(110)和放大增益级。 放大级具有与放大器输入部分(110)并联耦合的两个增益路径(120,140)。 增益路径(120)中的至少一个具有放大部件(121),其部分地形成用于在第一和第二操作模式之间进行选择的开关。

    Method for subscribing to a wireless service
    2.
    发明授权
    Method for subscribing to a wireless service 失效
    用于订阅无线服务的方法

    公开(公告)号:US07319870B2

    公开(公告)日:2008-01-15

    申请号:US10029107

    申请日:2001-12-20

    IPC分类号: H04Q7/20 G06Q40/00

    摘要: A method is provided for configuring a subscriber unit for operation in a wireless communications system. Information on available wireless services is advertised through well known, and publicly accessible, broadcast media, for the benefit of potential subscribers. A potential subscriber uses a subscriber unit to access the broadcast media and obtain a set of available wireless services (310). The subscriber unit supplies a particular criteria related to one or more of the available wireless services to a brokering agent, and receives from the brokering agent a list of service providers meeting the criteria (320, 330, 340). The subscriber unit then establishes a subscription relationship with a selected service provider, and self-configures to operate in a mode that supports interaction with the service provider (350).

    摘要翻译: 提供了一种用于配置用于在无线通信系统中操作的用户单元的方法。 有关可用无线服务的信息通过众所周知的和可公开访问的广播媒体进行宣传,以便潜在的用户受益。 潜在用户使用用户单元访问广播媒体并获得一组可用无线服务(310)。 订户单元向代理代理提供与一个或多个可用无线服务相关的特定标准,并且从代理代理接收符合标准(320,330,340)的服务提供商列表。 订户单元然后建立与所选服务提供商的订阅关系,并且自配置以支持与服务提供商(350)的交互的模式操作。

    Feedforward amplifier
    3.
    发明授权
    Feedforward amplifier 有权
    前馈放大器

    公开(公告)号:US06573792B1

    公开(公告)日:2003-06-03

    申请号:US10017984

    申请日:2001-12-13

    IPC分类号: H03F100

    CPC分类号: H03F1/3229

    摘要: A feedforward amplifier (150) according to the present invention uses a direct coupling of an amplifier stage (158) with the amplifier's load (RL). The main amplifier (202) is coupled through a transmission line (210) to the load. This direct coupled amplifier stage (158) is driven by a signal that induces a very low impedance in parallel with the load to the error signal, but appears as an open circuit to the desired signal so that the desired signal from the main amplifier is substantially unaffected.

    摘要翻译: 根据本发明的前馈放大器(150)使用放大器级(158)与放大器的负载(RL)的直接耦合。 主放大器(202)通过传输线(210)耦合到负载。 该直接耦合放大器级158由一个信号驱动,该信号引起与该误差信号的负载并联的非常低的阻抗,但是作为对所需信号的开路呈现,使得来自主放大器的所需信号基本上 不受影响

    Method and apparatus utilizing a compensated multiple output signal
source
    4.
    发明授权
    Method and apparatus utilizing a compensated multiple output signal source 失效
    利用补偿多输出信号源的方法和装置

    公开(公告)号:US5901346A

    公开(公告)日:1999-05-04

    申请号:US773798

    申请日:1996-12-17

    摘要: A compensated signal source (210, 220) utilizes baseband signals and a radio frequency carrier signal to generate a set of source output signals (226, 227) which are coupled to a particular circuit (230, 240, 250). The signal source (210, 220) is operable in a characterizing mode in which a test configuration is applied, and outputs from the signal source and the particular circuit measured to develop parameters representing imperfections within the signal source and within the particular circuit. The signal source (210, 220) is operable in a normal mode, in which compensation based on the measured parameters is applied to account for the imperfections. In a preferred embodiment, the particular circuit (230, 240, 250) and compensated signal source (210, 220) form part of an amplifier (200) that implements linear amplification using nonlinear components (LINC) techniques.

    摘要翻译: 补偿信号源(210,220)利用基带信号和射频载波信号来产生耦合到特定电路(230,240,250)的一组源输出信号(226,227)。 信号源(210,220)可以在其中应用测试配置的特征模式中操作,并且测量信号源和特定电路的输出,以产生表示信号源内和特定电路内的缺陷的参数。 信号源(210,220)可以在正常模式下操作,其中应用基于所测量的参数的补偿来解释缺陷。 在优选实施例中,特定电路(230,240,250)和补偿信号源(210,220)形成使用非线性分量(LINC)技术实现线性放大的放大器(200)的一部分。

    RF amplifier with enhanced efficiency
    5.
    发明授权
    RF amplifier with enhanced efficiency 有权
    射频放大器提高了效率

    公开(公告)号:US07102429B2

    公开(公告)日:2006-09-05

    申请号:US10184742

    申请日:2002-06-28

    IPC分类号: H03G3/20

    摘要: A high efficiency amplifier arrangement consistent with certain embodiments of the invention has an amplifier (104) that receives an input signal and amplifies the input signal to produce an output signal that drives a load (108). A variable impedance transformer (300) is disposed between the amplifier (104) and the load (108) to presents a varying load impedance to the output of the amplifier (104). A control mechanism, such as a programmed processor (604, 504), controls the variable impedance transformer (300) with a control signal so that the load impedance seen by the amplifier (104) varies in accordance with an envelope of the input signal. The control signal varies the load impedance in a manner that keeps the output of the amplifier (104) near a peak value. The arrangement may further include a circuit for controlling a DC input bias (420) of the amplifier (104) to keep the amplifier (104) operating within a predetermined class of operation throughout a range of input signals. The control signal may be calculated, looked up in a lookup table (610) or derived from an envelope detector (404).

    摘要翻译: 与本发明的某些实施例一致的高效率放大器布置具有接收输入信号并放大输入信号以产生驱动负载(108)的输出信号的放大器(104)。 可变阻抗变压器(300)设置在放大器(104)和负载(108)之间,以向放大器(104)的输出提供变化的负载阻抗。 诸如编程处理器(604,504)的控制机构利用控制信号来控制可变阻抗变压器(300),使得放大器(104)看到的负载阻抗根据输入信号的包络而变化。 控制信号以使得放大器(104)的输出接近峰值的方式改变负载阻抗。 该装置还可以包括用于控制放大器(104)的DC输入偏置(420)以保持放大器(104)在整个输入信号范围内在预定类别的操作中的电路。 可以计算控制信号,在查找表(610)中查找或从包络检测器(404)导出。

    Distributed RF power amplifier with load compensation
    6.
    发明授权
    Distributed RF power amplifier with load compensation 有权
    分布式RF功率放大器,带负载补偿

    公开(公告)号:US06768378B2

    公开(公告)日:2004-07-27

    申请号:US10017986

    申请日:2001-12-13

    IPC分类号: H03F360

    摘要: A radio frequency power amplifier circuit according to certain embodiments of the present invention uses a distributed radio frequency amplifier 110 having a plurality of stages each with an input. The distributed radio frequency amplifier 110 drives an output load, such as an antenna 114. A drive signal synthesizer 106, having a plurality of outputs, drives the plurality of inputs to the distributed amplifier 110. Changes in load impedance are measured, e.g., using a directional coupler 160, and the measurement is used to change a drive signal produced by the drive signal synthesizer 106 to compensate for the change in load impedance.

    摘要翻译: 根据本发明的某些实施例的射频功率放大器电路使用具有多个级的具有输入的分布式射频放大器110。 分布式射频放大器110驱动诸如天线114的输出负载。具有多个输出的驱动信号合成器106将多个输入驱动到分布式放大器110.测量负载阻抗的变化,例如使用 定向耦合器160,并且使用该测量来改变由驱动信号合成器106产生的驱动信号,以补偿负载阻抗的变化。

    Feedforward notch filter
    7.
    发明授权
    Feedforward notch filter 有权
    前馈陷波滤波器

    公开(公告)号:US06556080B1

    公开(公告)日:2003-04-29

    申请号:US10017985

    申请日:2001-12-13

    IPC分类号: H03F100

    CPC分类号: H03F1/3223

    摘要: A feedforward amplifier and notch filter (150) according to the present invention uses a direct coupling of an amplifier stage (158) with the amplifier's load (RL). The main amplifier (202) is coupled through a transmission line (210) to the load. This direct coupled amplifier stage (158) is driven by an signal that induces a very low impedance in parallel with the load at the receive frequency, but appears as an open circuit at the desired frequencies so that the desired signal from the main amplifier is virtually unaffected while output components at the receive frequency are cancelled.

    摘要翻译: 根据本发明的前馈放大器和陷波滤波器(150)使用放大器级(158)与放大器负载(RL)的直接耦合。 主放大器(202)通过传输线(210)耦合到负载。 该直接耦合放大器级158由一个信号驱动,该信号在接收频率处引起与负载并联的非常低的阻抗,但是以期望的频率显现为开路,使得来自主放大器的期望信号实际上 不受影响,而接收频率的输出组件被取消。

    Method and apparatus for efficient signal power amplification
    8.
    发明授权
    Method and apparatus for efficient signal power amplification 失效
    用于有效信号功率放大的方法和装置

    公开(公告)号:US5892395A

    公开(公告)日:1999-04-06

    申请号:US850541

    申请日:1997-05-02

    CPC分类号: H03F3/602 H03F1/0294

    摘要: An apparatus (100) uses power recovery from a combining circuit (125) to improve efficiency. A power combiner (125) generates multiple output signals (127, 133) from a combination of input signals (113, 114). One of the output signals from the power combiner is coupled to a power recovery circuit (135), and energy is recovered and preferably stored for later use.

    摘要翻译: 装置(100)使用来自组合电路(125)的功率恢复来提高效率。 功率组合器(125)根据输入信号(113,114)的组合产生多个输出信号(127,133)。 来自功率组合器的输出信号中的一个耦合到功率恢复电路(135),并且能量被恢复并且优选地存储以备以后使用。

    DIRECT DIGITAL SYNTHESIZER WITH VARIABLE REFERENCE FOR IMPROVED SPURIOUS PERFORMANCE
    9.
    发明申请
    DIRECT DIGITAL SYNTHESIZER WITH VARIABLE REFERENCE FOR IMPROVED SPURIOUS PERFORMANCE 有权
    具有可改善性能的可变参考的直接数字合成器

    公开(公告)号:US20080258791A1

    公开(公告)日:2008-10-23

    申请号:US11861860

    申请日:2007-09-26

    IPC分类号: H03H11/26

    摘要: Improvement of quantization errors that arise in a delay line with finite resolution. A direct digital synthesizer (DDS), which contains a numerically controlled oscillator (NCO) and a digital-to-phase converter (DPC), is placed in the feedback loop of a phase locked loop (PLL). The DDS is used as a fractional divider of the voltage controlled oscillator (VCO) frequency, such that the reference frequency of the DDS is made variable. Alignment of the edges provided by the DDS delay line may then be adjusted. Mismatch errors in the DDS delay line are reduced by utilizing independently tunable delay elements.

    摘要翻译: 改进在有限分辨率的延迟线中出现的量化误差。 包含数控振荡器(NCO)和数字 - 相位转换器(DPC)的直接数字合成器(DDS)放置在锁相环(PLL)的反馈环路中。 DDS用作压控振荡器(VCO)频率的分数分频器,使得DDS的参考频率变为可变。 然后可以调整由DDS延迟线提供的边缘的对准。 通过利用独立的可调谐延迟元件来减少DDS延迟线中的不匹配误差。

    Digital-to-time converter using cycle selection windowing
    10.
    发明授权
    Digital-to-time converter using cycle selection windowing 有权
    数字时间转换器采用周期选择窗口

    公开(公告)号:US07409416B2

    公开(公告)日:2008-08-05

    申请号:US11420941

    申请日:2006-05-30

    申请人: Robert E. Stengel

    发明人: Robert E. Stengel

    IPC分类号: G06F1/02

    摘要: A signal generator consistent with certain embodiments of the invention has a reference clock (34) producing a periodic sequence of reference clock output pulses. A window generator (38) generates a plurality of time windows through which a selected plurality of the reference clock output pulses are selectively passed as windowed pulses so that the windowed pulses form a selected pattern of pulses. A programmable delay (46) has resolution of delay that has finer time granularity in delay than the period of the clock output pulses. The programmable delay (46) delays each of the windowed pulses by a programmed delay time to thereby provide a timing correction to the windowed pulses to produce an output pattern of pulses.

    摘要翻译: 与本发明的某些实施例一致的信号发生器具有产生周期性的参考时钟输出脉冲序列的参考时钟(34)。 窗口产生器(38)产生多个时间窗口,所选择的多个参考时钟输出脉冲通过该时间窗口被选择性地作为窗口脉冲通过,使得窗口脉冲形成选定的脉冲图案。 可编程延迟(46)具有延迟分辨率,其延迟时间比时钟输出脉冲的周期更精细。 可编程延迟(46)将每个加窗脉冲延迟编程的延迟时间,从而为加窗脉冲提供定时校正,以产生脉冲的输出模式。