Device and control structure of multi-level pulse width modulation
    1.
    发明授权
    Device and control structure of multi-level pulse width modulation 失效
    多级脉宽调制的器件与控制结构

    公开(公告)号:US06927715B2

    公开(公告)日:2005-08-09

    申请号:US09750819

    申请日:2000-12-28

    IPC分类号: H03M1/82 H03M3/00

    CPC分类号: H03M1/822

    摘要: A multi-level pulse width modulation (MPWM) digital-to-analog converter for receiving a n-bit pulse code modulation (PCM) signal and then outputting a m-level analog signal is provided. The MPWM DAC comprises a converter circuit, 2m first output drivers, 2m second output drivers and a control circuit. The converter circuit is used for converting (n-m) most significant bits (MSB) of the n-bit PWM signal into a PWM waveform, and then generating a first input signal and a second input signal. Each of the 2m first output drivers is used for receiving the first input signal, and then generating a first output current, wherein the first output currents of the 2m first output drivers can be equal or not. Each of the 2m second output drivers is used for receiving the second input signal, and then generating a second output current, wherein the second output currents of the 2m first output drivers can be equal or not. The control circuit is coupled to the converter circuit, 2m first output drivers, and 2m second output drivers, for controlling the on-off status of each of the first and the second output drivers.

    摘要翻译: 提供了用于接收n位脉码调制(PCM)信号,然后输出m电平模拟信号的多电平脉宽调制(MPWM)数/模变换器。 MPWM DAC包括转换器电路,第二输出驱动器,第二输出驱动器和控制电路。 转换器电路用于将n位PWM信号的(n-m)最高有效位(MSB)转换为PWM波形,然后产生第一输入信号和第二输入信号。 两个第一输出驱动器中的每一个用于接收第一输入信号,然后产生第一输出电流,其中第二输出驱动器的第一输出电流 司机可以平等与否。 两个第二输出驱动器中的每一个用于接收第二输入信号,然后产生第二输出电流,其中第二输出电流的第二输出电流 司机可以平等与否。 控制电路耦合到转换器电路,第二输出驱动器和第二输出驱动器,用于控制第一和第二输出驱动器的开/关状态, 第二个输出驱动。