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    • 1. 发明授权
    • System and method for a multi-band transmitter
    • 多波段发射机的系统和方法
    • US08447246B2
    • 2013-05-21
    • US13207786
    • 2011-08-11
    • Omid OliaeiDavid NewmanBenjamin GilsdorfPatrick L. Rakers
    • Omid OliaeiDavid NewmanBenjamin GilsdorfPatrick L. Rakers
    • H04B1/04
    • H03D7/1441H03D7/1458H03D2200/0023H04B1/0057H04B1/0483
    • In accordance with some embodiments of the present disclosure, a multi-band transmitter comprises a plurality of band paths with each band path configured for a different frequency range. Each band path comprises a modulator configured to modulate a data signal onto a carrier signal associated with the frequency range of the band path to generate a radio frequency (RF) signal associated with the band path and frequency range of the band path. Each band path also comprises a step-down balun that includes an input coil configured to receive the RF signal from the modulator. Each band path further comprises a tuner configured to tune the input coil to the frequency range of the band path. The tuner is also configured to compensate for off-state conduction of switches of the tuner to reduce non-linear tuning effects of the balun associated with the off-state conduction.
    • 根据本公开的一些实施例,多频带发射机包括多个频带路径,每个频带路径被配置用于不同的频率范围。 每个频带路径包括被配置为将数据信号调制到与频带路径的频率范围相关联的载波信号上以产生与频带路径的频带路径和频带范围相关联的射频(RF)信号的调制器。 每个频带路径还包括降压平衡 - 不平衡变压器,其包括被配置为从调制器接收RF信号的输入线圈。 每个频带路径还包括被配置为将输入线圈调谐到频带路径的频率范围的调谐器。 调谐器还被配置为补偿调谐器的开关的截止状态传导,以减少与断开状态传导相关联的平衡 - 不平衡变换器的非线性调谐效应。
    • 2. 发明申请
    • SYSTEM AND METHOD FOR A MULTI-BAND TRANSMITTER
    • 一种多带发射机的系统和方法
    • US20130039438A1
    • 2013-02-14
    • US13207786
    • 2011-08-11
    • Omid OliaeiDavid NewmanBenjamin GilsdorfPatrick L. Rakers
    • Omid OliaeiDavid NewmanBenjamin GilsdorfPatrick L. Rakers
    • H04L27/00
    • H03D7/1441H03D7/1458H03D2200/0023H04B1/0057H04B1/0483
    • In accordance with some embodiments of the present disclosure, a multi-band transmitter comprises a plurality of band paths with each band path configured for a different frequency range. Each band path comprises a modulator configured to modulate a data signal onto a carrier signal associated with the frequency range of the band path to generate a radio frequency (RF) signal associated with the band path and frequency range of the band path. Each band path also comprises a step-down balun that includes an input coil configured to receive the RF signal from the modulator. Each band path further comprises a tuner configured to tune the input coil to the frequency range of the band path. The tuner is also configured to compensate for off-state conduction of switches of the tuner to reduce non-linear tuning effects of the balun associated with the off-state conduction.
    • 根据本公开的一些实施例,多频带发射机包括多个频带路径,每个频带路径被配置用于不同的频率范围。 每个频带路径包括被配置为将数据信号调制到与频带路径的频率范围相关联的载波信号上以产生与频带路径的频带路径和频带范围相关联的射频(RF)信号的调制器。 每个频带路径还包括降压平衡 - 不平衡变压器,其包括被配置为从调制器接收RF信号的输入线圈。 每个频带路径还包括被配置为将输入线圈调谐到频带路径的频率范围的调谐器。 调谐器还被配置为补偿调谐器的开关的截止状态传导,以减少与断开状态传导相关联的平衡 - 不平衡变换器的非线性调谐效应。
    • 6. 发明申请
    • Method and apparatus for protecting RF power amplifiers
    • 用于保护RF功率放大器的方法和装置
    • US20070052481A1
    • 2007-03-08
    • US11222545
    • 2005-09-08
    • David NewmanBenjamin GilsdorfDavid Peckham
    • David NewmanBenjamin GilsdorfDavid Peckham
    • H03F1/52
    • H03F3/189H03F1/52
    • Method and apparatus are provided for protecting radio frequency (RF) power amplifiers. A circuit (10) is provided for limiting a supply current to a first stage (Q3) of the RF power amplifier having a second stage (Q2) coupled to the first stage. The circuit comprises a comparator (14) having first and second inputs and an output, and a switching circuit (12, 20, 22, 24) having an input coupled to the output of the comparator (14) and having an output configured to couple to the first stage (Q3). The first input of the comparator (14) is configured to receive the supply current, and the second input is configured to receive a current supplied to the second stage (Q2). The comparator (14) is configured to compare a ratio of the supply current to the first stage to the current supplied to the second stage (Q2) with a predetermined value. The switching circuit (12, 20, 22, 24) is configured to limit the supply current to the first stage (Q3) when the ratio exceeds the predetermined value.
    • 提供了用于保护射频(RF)功率放大器的方法和装置。 提供电路(10)用于限制具有耦合到第一级的第二级(Q 2)的RF功率放大器的第一级(Q 3)的电源电流。 该电路包括具有第一和第二输入和一个输出的比较器(14)和一个具有耦合到比较器(14)的输出的输入的开关电路(12,20,22,24),并且具有被配置为耦合的输出 到第一阶段(问3)。 比较器(14)的第一输入被配置为接收电源电流,并且第二输入被配置为接收提供给第二级(Q 2)的电流。 比较器(14)被配置为将供应电流与第一级的比率与以第一级提供给第二级(Q 2)的电流进行比较。 开关电路(12,20,22,24)被配置为当该比率超过预定值时将供电电流限制到第一级(Q 3)。