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    • 32. 发明申请
    • NOISE-RESISTANT PULSE WIDTH MODULATOR
    • 抗噪声脉宽调制器
    • US20050258813A1
    • 2005-11-24
    • US10850164
    • 2004-05-21
    • Liang-Pin TaiKent HwangJian-Rong HuangKuo-Ping LiuCheng-Hsuan FanKo-Cheng WangYu-Fan Liao
    • Liang-Pin TaiKent HwangJian-Rong HuangKuo-Ping LiuCheng-Hsuan FanKo-Cheng WangYu-Fan Liao
    • G05F1/40G05F1/44H02M1/08
    • H02M1/08
    • A pulse width modulator includes an amplifier module, a comparator module, and a filter module. The amplifier module receives a feedback voltage signal from a passive network, and generates first and second non-inverted voltage signals and first and second inverted voltage signals in response to the feedback voltage signal. The comparator module receives the first and second non-inverted voltage signals and the first and second inverted voltage signals, and provides first and second differential voltage signals corresponding to the first and second non-inverted voltage signals and the first and second inverted voltage signals. The filter module is coupled between the amplifier module and the comparator module, and is operable so as to attenuate high frequency components of the first and second non-inverted voltage signals. As such, the presence of noise in the feedback voltage signal does not affect differential operation of the comparator module.
    • 脉冲宽度调制器包括放大器模块,比较器模块和滤波器模块。 放大器模块从无源网络接收反馈电压信号,并响应于反馈电压信号产生第一和第二非反相电压信号以及第一和第二反相电压信号。 比较器模块接收第一和第二非反相电压信号以及第一和第二反相电压信号,并提供对应于第一和第二非反相电压信号以及第一和第二反相电压信号的第一和第二差分电压信号。 滤波器模块耦合在放大器模块和比较器模块之间,并且可操作以便衰减第一和第二非反相电压信号的高频分量。 因此,反馈电压信号中的噪声的存在不会影响比较器模块的差分工作。