1、 功放电路的设计功放电路的设计 1 功放电路的设计功放电路的设计 摘要摘要 本文主要研究的内容是:功放电路的工作原理,及实际组装中的元器件的选用,以 新增因了 10 小时计时电路,既有时序逻辑电路(计时器电路) ,又有组合逻辑电路(译 码器电路)和数码显示电路;计时范围是 0:00:009:59:59,共计 10 小时。 它由秒脉冲产生电路、计数器电路、译码器及显示电路。先由 555 振荡电路产生秒 脉冲,然后提供给数字钟的秒计数器,计数满 60 秒后回零,并向分计时器输出一个进 位信号;分计数器开始计数后,计数满 60 分后回零,同时向时计时器输出一个进位信 号,时计数器按十进制进行计数,最
2、后由译码器及显示电路显示计时结果。以便人们使 用方便。本文以主要讨论了散热片的作用,及箱体制作的方法,实用性强。 【关键词关键词】: : 功放功放 整流整流 滤波滤波 集成集成 功率功率 放大放大 散热散热 功放电路的设计功放电路的设计 2 Circuital design of meritorious service readjust oneself to Circuital design of meritorious service readjust oneself to a certain extenta certain extent AbstractAbstract The conte
3、nt the main body of a book is studied mainly is: And circuitaloperating principle of meritorious service readjust oneself to a certain extent, components in actual assembling selects and uses, circuit reckoning by time 10 hours in order to having increased a reason newly, now that the order logic ci
4、rcuit (calculagraph circuit), there be combination logic circuit (decoder circuit) and numerical code to demonstrate a circuit sometimes; The rangereckoning by time is 0:00:00 9:59:59, totals 10 hour. It produces circuit , counter circuit , decoder and demonstrates a circuit from second of pulse. The oscillating circuit produces second of pulse first from 555 ,provide second of counter giving a digital clock and then, the full 60 secondsqueen of