檢視异步计数器的原始碼

[[File:异步计数器.jpg|缩略图|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%BC%82%E6%AD%A5%E8%AE%A1%E6%95%B0%E5%99%A8&step_word=&hs=0&pn=4&spn=0&di=85030&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=2712582244%2C3639517483&os=2284848813%2C3759293703&simid=4249061470%2C570633008&adpicid=0&lpn=0&ln=787&fr=&fmq=1636799828833_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fgss0.baidu.com%2F7Po3dSag_xI4khGko9WTAnF6hhy%2Fzhidao%2Fpic%2Fitem%2F8b13632762d0f703d6d079bd05fa513d2697c575.jpg%26refer%3Dhttp%3A%2F%2Fgss0.baidu.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1639392215%26t%3D48bbf585e955a8270ec3e1a8a3455c66&fromurl=ippr_z2C%24qAzdH3FAzdH3Fzit1w5_z%26e3Bkwt17_z%26e3Bv54AzdH3Fq7jfpt5gAzdH3Fmb0anbbamnnd0lnnnd_z%26e3Bip4s&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined&dyTabStr=MCwxLDMsNiw0LDUsMiw3LDgsOQ%3D%3D 原图链接][https://zhidao.baidu.com/question/687038806332793332.html 来自百度知道]]]
'''异步计数器'''是异步时序电路，其主要特点是内部各触发器的时钟脉冲端CP不全都连接在一起，因此各触发器的翻转时刻有先有后，其输出可能会产生干扰毛刺现象，但其电路结构简单。<ref>[https://baijiahao.baidu.com/s?id=1651788184967826073&wfr=spider&for=pc 应用可编程芯片实现小水电站的半周期精确测频]电气新科技</ref>