中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

39 records (took 0.016 seconds)

    Method for generating a signal with a definable pulse shape
    21.
    发明申请
    Method for generating a signal with a definable pulse shape 有权
    用于产生具有可定义的脉冲形状的信号的方法

    公开(公告)号：US20050243945A1

    公开(公告)日：2005-11-03

    申请号：US11108689

    申请日：2005-04-19

    Applicant: Sven Luecke ,  Andreas Salomon

    Inventor： Sven Luecke ,  Andreas Salomon

    IPC: H03F1/32 ,  H03F3/24 ,  H03K4/02 ,  H03K5/01 ,  H04L27/04

    CPC classification number: H03K5/01 ,  H03F1/3241 ,  H03F3/24 ,  H03F2201/3236 ,  H03K4/026

    Abstract: In a method of generating a pulse-shaped transmitted output signal having a definable pulse shape in a multistage amplifier arrangement, the course of the “pulse top” (upper edge) of the transmitted signal is determined by control signals at the amplifier stages. The control signals of the amplifier stages are definable such that the control signal of an amplifier stage in each case comprises a number of pulse sections of a predefinable frame pulse. The tops of the pulse sections each having a predefinable constant gradient. A predistortion is introduced into the control signals in this manner, having a course which offsets distortion of the pulse top which results when no predistortion is used.

    Abstract translation: 在多级放大器装置中产生具有可定义脉冲形状的脉冲状发送输出信号的方法中，发射信号的“脉冲顶部”（上边沿）的过程由放大器级的控制信号确定。 放大器级的控制信号是可定义的，使得放大器级的控制信号在每种情况下都包括多个预定义帧脉冲的脉冲段。 脉冲部分的顶部各自具有预定义的恒定梯度。 以这种方式将预失真引入到控制信号中，具有补偿当不使用预失真时产生的脉冲顶部失真的过程。

    Amplifying system
    24.
    发明授权
    Amplifying system 有权
    放大系统

    公开(公告)号：US09584085B2

    公开(公告)日：2017-02-28

    申请号：US14554542

    申请日：2014-11-26

    Applicant: RF Micro Devices, Inc.

    Inventor： Baker Scott ,  George Maxim ,  Dirk Robert Walter Leipold

    IPC: H03G3/30 ,  H03F3/68 ,  H03F3/19 ,  H03F1/32 ,  H03F1/52 ,  H03F1/02 ,  H04B1/04 ,  H03F1/22 ,  H03F1/56 ,  H03F3/45 ,  H03F3/193

    CPC classification number: H03G3/3036 ,  H03F1/0211 ,  H03F1/0272 ,  H03F1/223 ,  H03F1/32 ,  H03F1/523 ,  H03F1/565 ,  H03F3/19 ,  H03F3/193 ,  H03F3/24 ,  H03F3/45179 ,  H03F3/45394 ,  H03F3/68 ,  H03F2200/324 ,  H03F2200/387 ,  H03F2200/451 ,  H03F2200/471 ,  H03F2201/3236 ,  H03G3/3042 ,  H04B1/0475 ,  H04B2001/0408 ,  H04B2001/0416 ,  H04B2001/0425

    Abstract: An amplifying system with increased linearity is disclosed. The amplifying system includes a first gain stage with a first gain characteristic, a second gain stage with a second gain characteristic, and bias circuitry configured to substantially maintain alignment of distortion inflection points between the first gain characteristic and the second gain characteristic during operation. The bias circuitry is configured to further maintain alignment of the distortion inflection points between the first gain characteristic and the second gain characteristic over design corners by providing substantially constant headroom between quiescent bias voltage and turnoff of the first gain stage and the second gain stage. In some embodiments the first gain characteristic is expansive and the second gain characteristic is compressive. In other embodiments the first gain characteristic is compressive and the second gain characteristic is expansive. In some embodiments the first gain stage is configured to provide RF degeneration control of gain.

    Abstract translation: 公开了具有增加的线性度的放大系统。 放大系统包括具有第一增益特性的第一增益级，具有第二增益特性的第二增益级，以及被配置为在操作期间基本保持第一增益特性与第二增益特性之间的失真拐点对准的偏置电路。 偏置电路被配置为通过在静态偏置电压和第一增益级与第二增益级的截止之间提供基本恒定的余量，进一步保持在设计角上的第一增益特性和第二增益特性之间的失真拐点的对准。 在一些实施例中，第一增益特性是膨胀的，第二增益特性是压缩的。 在其他实施例中，第一增益特性是压缩的，第二增益特性是膨胀的。 在一些实施例中，第一增益级被配置为提供增益的RF退化控制。

    PARALLEL AMPLIFIER LINEARIZATION IN A RADIO FREQUENCY SYSTEM
    25.
    发明申请
    PARALLEL AMPLIFIER LINEARIZATION IN A RADIO FREQUENCY SYSTEM 审中-公开
    无线电频率系统的并联放大器线性化

    公开(公告)号：US20170005624A1

    公开(公告)日：2017-01-05

    申请号：US15191954

    申请日：2016-06-24

    Applicant: Skyworks Solutions, Inc.

    Inventor： Yu Zhu ,  Dylan Charles Bartle ,  Oleksiy Klimashov ,  Paul T. DiCarlo

    IPC: H03F1/32 ,  H04B1/3827 ,  H03F3/19 ,  H03F3/24 ,  H03F3/193

    CPC classification number: H03F1/3205 ,  H03F1/0266 ,  H03F1/32 ,  H03F3/19 ,  H03F3/193 ,  H03F3/195 ,  H03F3/211 ,  H03F3/245 ,  H03F3/4508 ,  H03F3/45179 ,  H03F2200/102 ,  H03F2200/105 ,  H03F2200/15 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2201/3215 ,  H03F2201/3236 ,  H04B1/3827 ,  H04B1/40 ,  H04B1/48 ,  H04B1/525 ,  H04B2001/485 ,  H04W88/02

    Abstract: A linearization circuit reduces intermodulation distortion in a parallel amplifier that includes a first stage and a second stage. The linearization circuit receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency, generates an envelope signal based at least in part on a power level of the first signal, and adjusts a magnitude of the difference signal based on the envelope signal. When the parallel amplifier receives the first signal at an input terminal, the first stage receives the adjusted signal, and the second stage does not receive the adjusted signal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation between the first frequency and the second frequency from the output of the parallel amplifier.

    Abstract translation: 线性化电路减少包括第一级和第二级的并联放大器中的互调失真。 线性化电路接收包括第一频率和第二频率的第一信号，并产生具有大致等于第一频率和第二频率的差的频率的差分信号，至少部分地基于功率产生包络信号 电平，并且基于包络信号来调整差分信号的幅度。 当并联放大器在输入端接收到第一信号时，第一级接收经调整的信号，第二级不接收经调整的信号，经调整的信号与第一信号之间的互调消除了至少一部分互调之间的互调， 第一个频率和第二个频率来自并行放大器的输出。

    AMPLIFYING SYSTEM
    26.
    发明申请
    AMPLIFYING SYSTEM 有权
    放大系统

    公开(公告)号：US20150155843A1

    公开(公告)日：2015-06-04

    申请号：US14554542

    申请日：2014-11-26

    Applicant: RF Micro Devices, Inc.

    Inventor： Baker Scott ,  George Maxim ,  Dirk Robert Walter Leipold

    IPC: H03G3/30 ,  H03F3/68 ,  H03F3/19 ,  H03F1/32

    CPC classification number: H03G3/3036 ,  H03F1/0211 ,  H03F1/0272 ,  H03F1/223 ,  H03F1/32 ,  H03F1/523 ,  H03F1/565 ,  H03F3/19 ,  H03F3/193 ,  H03F3/24 ,  H03F3/45179 ,  H03F3/45394 ,  H03F3/68 ,  H03F2200/324 ,  H03F2200/387 ,  H03F2200/451 ,  H03F2200/471 ,  H03F2201/3236 ,  H03G3/3042 ,  H04B1/0475 ,  H04B2001/0408 ,  H04B2001/0416 ,  H04B2001/0425

    Abstract: An amplifying system with increased linearity is disclosed. The amplifying system includes a first gain stage with a first gain characteristic, a second gain stage with a second gain characteristic, and bias circuitry configured to substantially maintain alignment of distortion inflection points between the first gain characteristic and the second gain characteristic during operation. The bias circuitry is configured to further maintain alignment of the distortion inflection points between the first gain characteristic and the second gain characteristic over design corners by providing substantially constant headroom between quiescent bias voltage and turnoff of the first gain stage and the second gain stage. In some embodiments the first gain characteristic is expansive and the second gain characteristic is compressive. In other embodiments the first gain characteristic is compressive and the second gain characteristic is expansive. In some embodiments the first gain stage is configured to provide RF degeneration control of gain.

    Abstract translation: 公开了具有增加的线性度的放大系统。 放大系统包括具有第一增益特性的第一增益级，具有第二增益特性的第二增益级，以及被配置为在操作期间基本保持第一增益特性与第二增益特性之间的失真拐点对准的偏置电路。 偏置电路被配置为通过在静态偏置电压和第一增益级与第二增益级的截止之间提供基本恒定的余量，进一步保持在设计角上的第一增益特性和第二增益特性之间的失真拐点的对准。 在一些实施例中，第一增益特性是膨胀的，第二增益特性是压缩的。 在其他实施例中，第一增益特性是压缩的，第二增益特性是膨胀的。 在一些实施例中，第一增益级被配置为提供增益的RF退化控制。

    Systems and methods for improving performance in a digital amplifier by adding an ultrasonic signal to an input audio signal
    27.
    发明授权
    Systems and methods for improving performance in a digital amplifier by adding an ultrasonic signal to an input audio signal 失效
    通过向输入音频信号添加超声波信号来提高数字放大器的性能的系统和方法

    公开(公告)号：US07649410B2

    公开(公告)日：2010-01-19

    申请号：US11626569

    申请日：2007-01-24

    Applicant: Jack B. Andersen ,  Peter G. Craven

    Inventor： Jack B. Andersen ,  Peter G. Craven

    IPC: H03F3/38

    CPC classification number: H03F3/217 ,  H03F1/3264 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/114 ,  H03F2200/351 ,  H03F2201/3236 ,  H03K17/162 ,  H03K17/6871

    Abstract: Systems and methods in which an ultrasonic signal is introduced into an audio signal before the audio signal is amplified by a switching amplifier. The added ultrasonic signal (e.g., a tone at half the amplifier's switching frequency) shifts the signals input to a set of power switches so that they do not switch nearly simultaneously. The ultrasonic signal causes the output current to be well defined to eliminate dead time distortion at low signal levels. Adding the tone ultrasonic signal causes the distortion to shift to an amplitude greater than zero. Signals that exceed this amplitude will experience the distortion, but the distortion will be less noticeable than in lower-amplitude signals. Signals that do not exceed this amplitude will not experience the distortion at all. Adding an ultrasonic signal may also draw energy away from the switch frequency and its harmonics to interference with AM radio reception.

    Abstract translation: 在音频信号被开关放大器放大之前，将超声波信号引入到音频信号中的系统和方法。 增加的超声波信号（例如，放大器开关频率的一半处的音调）将输入的信号移动到一组电源开关，使得它们几乎不同时切换。 超声波信号使得输出电流被良好地定义，以消除低信号电平下的死区失真。 增加音调超声信号会导致失真转移到大于零的幅度。 超过该幅度的信号将经历失真，但是失真比在较低幅度信号中更不明显。 不超过此幅度的信号根本不会出现失真。 添加超声波信号也可能会从开关频率及其谐波中吸收能量，从而干扰AM无线电接收。

    Method for clipping a wideband radio signal and corresponding transmitter
    28.
    发明申请
    Method for clipping a wideband radio signal and corresponding transmitter 有权
    用于限幅宽带无线电信号和相应发射机的方法

    公开(公告)号：US20020042253A1

    公开(公告)日：2002-04-11

    申请号：US09970694

    申请日：2001-10-05

    Applicant: ALCATEL

    Inventor： Luc Dartois

    IPC: H04B001/04

    CPC classification number: H03F1/3247 ,  H03F2200/102 ,  H03F2201/3236

    Abstract: The invention relates notably to a method for clipping a wideband signal in order to eliminate signal overshots having an amplitude above a predefined threshold before submitting the wideband signal to a power amplifier. According to the invention, the method comprises the steps of: i. subtracting from the wideband signal filtered pulses in phase the said wideband signal, each filtered pulse corresponding to an overshot, the amplitude of each filtered pulse being dependent on the amplitude of the corresponding overshot and on the predefined threshold. ii. repeating at least two successive iterations of step i on said wideband signal.

    Abstract translation: 本发明特别涉及一种用于削波宽带信号的方法，以便在将宽带信号提交给功率放大器之前，消除幅度高于预定阈值的信号超时。 根据本发明，该方法包括以下步骤： 从宽带信号中滤除所述宽带信号的滤波脉冲，每个滤波的脉冲对应于过拍，每个滤波的脉冲的幅度取决于相应的超拍的幅度和预定阈值。 ii。 在所述宽带信号上重复步骤i的至少两次连续迭代。

Patent Agency Ranking