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    • 9. 发明授权
    • Pulse width modulation with effective high duty resolution
    • 具有高占空比分辨率的脉宽调制
    • US09490792B2
    • 2016-11-08
    • US12703239
    • 2010-02-10
    • Bin Zhao
    • Bin Zhao
    • H03K7/08H04N9/31H05B33/08H02M1/084
    • H03K7/08H02M1/084H04N9/3123H05B33/0818H05B33/0845Y02B20/346
    • A pulse width modulation (PWM) signal generator generates a PWM signal having a specified effective PWM duty resolution for a corresponding cycle window. The PWM signal generator receives an N-bit value representing a duty to be implemented and sets values X and Y to the M least significant bits and the N-M most significant bits, respectively, of the N-bit value. The value M can be determined based on the value N and a maximum implementable frequency of a clock signal used to time the generation of each PWM cycle. The PWM signal generator generates a cycle window of 2M PWM cycles, each PWM cycle of the cycle window having a duty of either Y or Y+1. The number of PWM cycles in the cycle window having the duty Y+1 is based on the value X and the PWM cycles having a particular duty are contiguous within the cycle window.
    • 脉冲宽度调制(PWM)信号发生器产生对于相应的周期窗口具有指定的有效PWM占空比分辨率的PWM信号。 PWM信号发生器接收表示要实现的占空比的N位值,并将值X和Y分别设置为N位值的M个最低有效位和N-M个最高有效位。 可以基于用于时间产生每个PWM周期的时钟信号的值N和最大可实施频率来确定值M. PWM信号发生器产生2M个PWM周期的周期窗口,周期窗口的每个PWM周期具有Y或Y + 1的占空比。 具有占空比Y + 1的周期窗口中的PWM周期的数量基于值X,并且具有特定占空比的PWM周期在周期窗口内是连续的。