周期信号钳位的一种新方法及在PWM调制中的应用

A Novel Method of Clamping Periodic Signal and Application in PWM

提出一种利用运算放大器和比较器实现信号钳位的方法。与传统的二极管钳位方法相比,具有钳位速度快、精度高、调节方便等特点。软件仿真和实际电路测试都证明了电路的有效性。文中给出了一个DSPWM调制应用电路实例,并进行了仿真,结果符合预期。

This paper presents a novel method which use an operational amplifiers and a comparators for signal clamp-ing.Compared with the traditional methods which use Diode for clamping,the new method is faster in clamping speed,more accurate,easier to adjust etc.Software simulation and the actual circuit testing have proven the effective-ness of the circuit.The paper also gives a DSPWM modulation application circuit examples,and simulation results met expectations.