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    • 5. 发明申请
    • MOTOR DRIVE CIRCUIT
    • 电机驱动电路
    • US20120161687A1
    • 2012-06-28
    • US13330983
    • 2011-12-20
    • Takeshi AraiAkira Suzuki
    • Takeshi AraiAkira Suzuki
    • G05B5/01
    • H02P25/034H03H17/04
    • A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, the target-current signal corresponding to a digital signal indicative of a target value of a driving current; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the voice-coil motor in accordance with the current-control signal, the filter circuit including: a digital notch filter; and a digital low-pass filter, wherein either one of the digital notch filter and the digital low-pass filter configured to be inputted with the target-current signal, the other one of the digital notch filter and the digital low-pass filter configured to be inputted with an output signal of the one of the digital notch filter or the digital low-pass filter.
    • 电机驱动电路包括:滤波电路,用于衰减包括目标电流信号中的致动器的谐振频率的频带,对应于指示驱动电流的目标值的数字信号的目标电流信号; 数模转换器,将滤波电路的输出信号转换为模拟信号,作为电流控制信号输出; 以及根据电流控制信号向音圈电动机提供驱动电流的驱动电路,该滤波电路包括:数字陷波滤波器; 以及数字低通滤波器,其中数字陷波滤波器和数字低通滤波器中的任一个被配置为输入目标电流信号,另一个数字陷波滤波器和数字低通滤波器被配置 输入数字陷波滤波器或数字低通滤波器之一的输出信号。