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    • 11. 发明申请
    • Switching Circuit
    • 开关电路
    • US20100327948A1
    • 2010-12-30
    • US12493437
    • 2009-06-29
    • John NisbetMichael McPartlinChun-Wen Paul Huang
    • John NisbetMichael McPartlinChun-Wen Paul Huang
    • H03K17/687
    • H04B1/44H03K17/687H03K2217/0036
    • A method for controlling a switch based on transistors is disclosed. A switching circuit for switching a signal from an input port to an output port thereof is provided. A shunting circuit for switchably shunting the signal from the input port to ground is also provided. A control signal is generated for biasing a control port of the shunting circuit and an approximately complimentary control signal is generated for biasing of the switching circuit to either shunt a signal received at the input port or to switch the signal to the output port. A further bias signal for biasing a port within the switching circuit along the signal path between the input port and the output port is also provided.
    • 公开了一种用于控制基于晶体管的开关的方法。 提供了用于将信号从输入端口切换到其输出端口的开关电路。 还提供了用于将信号从输入端口切换到地的分流电路。 产生用于偏置分流电路的控制端口的控制信号,并且产生大约互补的控制信号以用于偏置开关电路以分流在输入端口接收的信号或将信号切换到输出端口。 还提供了用于沿着输入端口和输出端口之间的信号路径偏置开关电路内的端口的另外的偏置信号。
    • 14. 发明授权
    • CDMA power amplifier design for low and high power modes
    • CDMA功率放大器设计用于低功耗和高功率模式
    • US07443236B2
    • 2008-10-28
    • US11784541
    • 2007-04-06
    • Gee Samuel DowJianwen BaoChun-Wen Paul Huang
    • Gee Samuel DowJianwen BaoChun-Wen Paul Huang
    • H03F1/14
    • H03F1/30H03F1/14H03F1/3241H03F1/56H03F3/189H03F3/191H03F3/60H03F2200/318H03F2200/411H03F2200/75
    • An amplifier circuit responsive to a power mode signal improves efficiency at low power levels without compromising efficiency at high power levels. At low power levels, high impedance is presented with suitable adjustment in the phase of the signal. Also, providing for predistortion linearization improves high power efficiency and switching the predistortion linearizer OFF at low power levels contributes little more than a small insertion loss. The power amplifier also uses a bias circuit incorporating a dual harmonic resonance filter to provide high impedance at a fundamental frequency and low impedance at a second harmonic. These properties are of particularly advantageous since amplifiers in cell-phones are used in low power modes most of the time although they are designed to be most efficient at primarily the highest power levels.
    • 响应于功率模式信号的放大器电路在低功率水平下提高效率,而不会在高功率水平下降低效率。 在低功率电平下,在信号的相位中适当调整高阻抗。 此外,提供预失真线性化提高了高功率效率,并且在低功率电平下切换预失真线性化器关闭仅仅贡献小于小的插入损耗。 功率放大器还使用包含双谐波谐振滤波器的偏置电路,以在基频处提供高阻抗,在二次谐波下提供低阻抗。 这些特性是特别有利的,因为手机中的放大器大部分时间都以低功率模式使用,尽管它们被设计为在主要最高功率水平下是最有效的。
    • 15. 发明授权
    • CDMA power amplifier design for low and high power modes
    • CDMA功率放大器设计用于低功耗和高功率模式
    • US07202736B1
    • 2007-04-10
    • US10807764
    • 2004-03-23
    • Gee Samuel DowJianwen BaoChun-Wen Paul Huang
    • Gee Samuel DowJianwen BaoChun-Wen Paul Huang
    • H03G3/20H03F1/14
    • H03F1/30H03F1/14H03F1/3241H03F1/56H03F3/189H03F3/191H03F3/60H03F2200/318H03F2200/411H03F2200/75
    • An amplifier circuit responsive to a power mode signal improves efficiency at low power levels without compromising efficiency at high power levels. At low power levels, high impedance is presented with suitable adjustment in the phase of the signal. Also, providing for predistortion linearization improves high power efficiency and switching the predistortion linearizer OFF at low power levels contributes little more than a small insertion loss. The power amplifier also uses a bias circuit incorporating a dual harmonic resonance filter to provide high impedance at a fundamental frequency and low impedance at a second harmonic. These properties are of particularly advantageous since amplifiers in cell-phones are used in low power modes most of the time although they are designed to be most efficient at primarily the highest power levels.
    • 响应于功率模式信号的放大器电路在低功率水平下提高效率,而不会在高功率水平下降低效率。 在低功率电平下,在信号的相位中适当调整高阻抗。 此外,提供预失真线性化提高了高功率效率,并且在低功率电平下切换预失真线性化器关闭仅仅贡献小于小的插入损耗。 功率放大器还使用包含双谐波谐振滤波器的偏置电路,以在基频处提供高阻抗,在二次谐波下提供低阻抗。 这些特性是特别有利的,因为手机中的放大器大部分时间都以低功率模式使用,尽管它们被设计为在主要最高功率水平下是最有效的。