脉宽调制器中一类振荡器的全面解析结果

用分析法全面讨论脉宽调制器（IC：1842/3/4/5,1842A/3A/4A/5A）中振荡器的振荡特征参数（占空比D和频率f）与外接电阻R和电容C的关系.我们得到以R、C为自变量表达D和f的函数,以D、f为自变量求R、C的函数.并根据这些函数的计算结果绘制描述D、f、R、C（1F）4个参数之间的关系曲线.这些结果,不仅提升了对这类振荡器的认知,而且可供设计时直接引用和参考.

Completely Analytical Results of a Kind of Oscillators in Pulse Width Modulators

In this paper,the relations between the oscillation characteristic parameters（duty ration D,frequency f） and the parameters R and C connected with the oscillators in PWM（IC： 1842/3/4/5,1842A/3A/4A/5A） are completely discussed by means of the analytical method.Representations of D and f taking R and C as arguments,and representations of R and C taking D and f as arguments are obtained,and then based on the calculations of these representations,the curves for describing relations among the four parameters D 、f 、R 、C（equal to 1F） are drawn.These results not only greatly promote understanding of the oscillators,but also can be immediately quoted and referred during design.