555电路在级联应用中的频率计算与设计

The Oscillation Frequency Design & Calculation of 555 Circuit in the Application of Many-stage Cascade Connection

在电工电子实验教学中,发现555集成电路是比较基本的一款应用电路,他的更广泛应用之一是多级级联,在这一应用中的最初设计时的难点是振荡频率的计算。本文以一例实验电路的设计为例,介绍555定时集成电路的级联应用,给出了各级振荡频率的计算方法、时序波形和频率实测方法。

In the experiment teaching of electro technics and electronics, it is found that 555 timer was a basic applied circuit and one of its extensive applications was the manystage cascade connection The difficulty met in the original design of this application was the calculation of the oscillation frequency By analysesing the design of an experimental circuit, the author introduces the calculating method of the oscillation frequency in each stage as well as the measuring method of frequency and the sequential waveform