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    • 9. 发明申请
    • ACTIVE ISOLATED-INTEGRATOR LOW-PASS FILTER WITH ATTENUATION POLES
    • 主动隔离整合器低通滤波器与衰减波
    • WO0150599A3
    • 2002-01-10
    • PCT/US0035426
    • 2000-12-28
    • CROWN AUDIO INC
    • STANLEY GERALD R
    • H03H11/12
    • H03H11/126H03H11/1286
    • The present invention provides an active low-pass filter system including a low-pass filter circuit (22, 24, 26, 28, 30) and at least one frequency-rejecting network (20) coupled to the low-pass filter circuit. The frequency-rejecting network (20) is included in a resistive forward signal flow branch of the low-pass filter. The present invention also provides a power amplifier system (40) for driving a load (45). The power amplifier system (40) includes a pulse width modulation circuit (42) which creates ripple spectra, an error amplifier and modulator circuit (43), and a demoldulation filter (47) connected in series, and a feedback control loop coupled to the pulse modulation circuit (42) and including an active low-pass filter (44, 46) having a feedback demodulation filter (44) and an isolated-integrator frequency-rejecting network (20).
    • 本发明提供一种有源低通滤波器系统,其包括低通滤波器电路(22,24,26,28,30)和耦合到低通滤波器电路的至少一个频率抑制网络(20)。 频率抑制网络(20)包括在低通滤波器的电阻正向信号流分支中。 本发明还提供一种用于驱动负载(45)的功率放大器系统(40)。 功率放大器系统(40)包括产生纹波光谱的脉宽调制电路(42),误差放大器和调制器电路(43)和串联连接的解模滤波器(47),以及耦合到 脉冲调制电路(42),并且包括具有反馈解调滤波器(44)和隔离积分器频率抑制网络(20)的有源低通滤波器(44,46)。