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    • 2. 发明申请
    • SWITCHING AMPLIFIER WITH IMPEDANCE TRANSFORMATION OUTPUT STAGE
    • 具有阻抗变换输出级的开关放大器
    • WO1994021036A1
    • 1994-09-15
    • PCT/US1994002279
    • 1994-03-02
    • KIRN, Larry, J.
    • H03F03/38
    • H03F3/2171
    • A broadband switching amplifier utilizes an output stage capable of variable impedance transformation in addition to conventional controlled pulsewidth coupling to accurately produce outpout power without regard for normal power supply or load impedance constraints. In a preferred embodiment, the present invention charges and discharges a reactance (406) with gated switches (404, 405, 407, 408) in accordance with pulsewidth-modulated signals representative of an input signal. For voltage amplification the reactance is inductive, whereas for current amplification, the reactance is capacitive.
    • 除了常规的受控脉冲宽度耦合之外,宽带开关放大器还使用能够进行可变阻抗变换的输出级,以在不考虑正常电源或负载阻抗约束的情况下精确地产生输出功率。 在优选实施例中,本发明根据表示输入信号的脉冲宽度调制信号对门控开关(404,405,407,408)充电和放电电抗(406)。 对于电压放大,电抗为电感,而对于电流放大,电抗为电容。