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    • 4. 发明公开
    • PUSH-PULL AMPLIFICATION SYSTEMS AND METHODS
    • 推拉式放大系统和方法
    • EP2870692A1
    • 2015-05-13
    • EP13707072.8
    • 2013-01-31
    • Imagine Communications Corp.
    • CABRERA, GeorgeBORODULIN, Dmitri
    • H03F1/02H03F3/26H03F3/72
    • H03F1/0277H03F3/26H03F3/72
    • An amplification system is provided that comprises a push-pull amplifier system having a first power transistor series coupled with a second power transistor that alternately switch between a push-pull amplifier mode of operation and a single-ended amplifier mode of operation. In the push-pull amplifier mode, both the first power transistor and the second power transistor alternately conduct to provide an amplified output signal to an output load in response to an input signal having an amplitude that is greater than or equal to a threshold level. In the single-ended amplifier mode of operation, the first power transistor conducts and the second power transistor is disabled for amplification purposes in response to the input signal having an amplitude that is less than the threshold level.
    • 提供了一种放大系统,其包括推挽放大器系统,该推挽放大器系统具有与第二功率晶体管耦合的第一功率晶体管,所述第二功率晶体管在推挽放大器操作模式和单端放大器操作模式之间交替切换。 在推挽放大器模式中,第一功率晶体管和第二功率晶体管响应于具有大于或等于阈值电平的振幅的输入信号而交替导通以向输出负载提供放大的输出信号。 在单端放大器操作模式中,响应于具有小于阈值电平的幅度的输入信号,第一功率晶体管导通并且第二功率晶体管为放大目的被禁用。