对输入信号实现1.5倍频，输入数字信号频率范围 是1050~1100Hz（不一定是50 占空比的方波，并且输入信号频率可能在1050~1100Hz内缓慢变化，频率变化速率不高于小于10Hz/s），要求输出50 占空比的信号，并且频率是输入的1. 5倍，并能够连续跟踪输入频率的以及相位改变。-The input signal to achieve the 1.5 multiplier, input digital signal frequency range is 1050 ~ 1100Hz (not necessarily a 50　duty cycle square wave, and the input signal frequency may change slowly in 1050 ~ 1100Hz, frequency change rate is not higher than the less than 10Hz/s), the requirements of 50　duty cycle output signal, and the frequency is 1.5 times the input voltage, and continuously track the input frequency, and phase change.