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    • 3. 发明授权
    • Chopper circuitry operable in a high temperature environment of a turbine engine
    • 斩波器电路可在涡轮发动机的高温环境中操作
    • US08717095B2
    • 2014-05-06
    • US13544159
    • 2012-07-09
    • David J. MitchellJie YangRoberto Marcelo SchupbachJohn R. FraleyCora SchilligBryon Western
    • David J. MitchellJie YangRoberto Marcelo SchupbachJohn R. FraleyCora SchilligBryon Western
    • H03F1/02
    • G01K7/021G01K13/08H04Q9/00H04Q2209/40
    • Chopper circuitry may be adapted to operate in a high-temperature environment of a turbine. A first semiconductor switch (122) may have a first terminal coupled to receive a first output signal from a first leg (148) of a differential amplifier (150). A second switch (128) may have a first terminal coupled thru a first resistive element (R1) to a second terminal of the first semiconductor switch. The first terminal of the second semiconductor switch may be coupled to receive thru a second resistive element (R2) a second output signal from a second leg (152) of the amplifier. Switches (122,128) may be responsive to a switching control signal to respective gate terminals of the switches to supply an output signal, which alternates in correspondence with a frequency of the switching control signal from a first amplitude level to a second amplitude level, which effectively provides a doubling amplification factor.
    • 斩波器电路可以适于在涡轮机的高温环境中操作。 第一半导体开关(122)可以具有耦合以从差分放大器(150)的第一支路(148)接收第一输出信号的第一端子。 第二开关(128)可以具有通过第一电阻元件(R1)耦合到第一半导体开关的第二端子的第一端子。 第二半导体开关的第一端子可以被耦合以通过第二电阻元件(R2)接收来自放大器的第二支路(152)的第二输出信号。 开关(122,128)可以响应于开关的相应栅极端子的开关控制信号,以提供输出信号,该输出信号与切换控制信号的频率相对应,从第一幅度电平到第二幅度电平,这有效地 提供了倍增放大系数。