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    • 6. 发明申请
    • POWER AMPLIFIER CONTROL CIRCUIT
    • 功率放大器控制电路
    • WO2012088300A2
    • 2012-06-28
    • PCT/US2011/066553
    • 2011-12-21
    • SKYWORKS SOLUTIONS, INC.JOLY, Christophe, M.CHEN, YueXU, Shihui
    • JOLY, Christophe, M.CHEN, YueXU, Shihui
    • H03F1/30H03F3/24
    • H03F1/0211H03F1/0277H03F3/195H03F3/245H03F3/72H03F2200/102H03F2200/18H03F2203/7206
    • This disclosure provides systems, apparatus, and methods for switching a portion of a power amplifier on and off during different modes of operation. In one aspect, a control circuit can include separate switches to provide bias currents to different portions of a power amplifier. The control circuit can include another switch to electrically connect outputs of the separate switches in a first mode of operation (for example, a high power mode) and electrically isolate the outputs of the separate switches in a second mode of operation (for example, a low power mode). In some implementations, a circuit element, such as a field effect transistor or a diode, can turn off one of the separate switches in the second mode. Alternatively or additionally, another circuit element, such as a field effect transistor or a diode, can prevent a power amplifier portion from turning on in the second mode.
    • 本公开提供了用于在不同操作模式期间接通和断开功率放大器的一部分的系统,设备和方法。 在一个方面,控制电路可以包括分开的开关以向功率放大器的不同部分提供偏置电流。 控制电路可以包括另一个开关,以在第一操作模式(例如,高功率模式)下电连接单独开关的输出,并且在第二操作模式(例如,a)中电隔离单独开关的输出 低功耗模式)。 在一些实施方式中,诸如场效应晶体管或二极管的电路元件可以在第二模式中关闭单独开关中的一个。 可选地或附加地,诸如场效应晶体管或二极管之类的另一电路元件可以防止功率放大器部分在第二模式中导通。