555电路在级联应用中的频率计算与设计
摘要: 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。
关键词: 555 定时集成电路; 级联应用; 振荡频率计算; 时序波形
Abs tra c t: In the exper iment teach ing of elect ro technics and elect ronics, it is found that 555 t imer w as a basic app lied circuit and one of its extensive app licat ionsw as the many stage cascade connect ion1 The diff iculty met in the o r iginal design of th is app lication was the calculat ion of the o scillat ion f requency1By analysesing the design of an exper imental circuit, the autho r int roduces thecalculat ing method of the o scillat ion f requency in each stage as w ell as the measur ing method of f requency and the sequent ialw avefo rm
Key words: 555 t imer integrated circuit; app licat ion of the many stage cascade connect ion; calculat ion of the o scillat ionf requency; sequent ialw avefo rm
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