二、实验(shíyàn)原理各公司生产的555定时器的逻辑(luójí)功能与外引线排列都完全相同。电阻(diànzǔ)分压器电压(diànyā)比较器基本(jīběn)RS触发器放电管T555定时器功能表1、施密特触发器2、用555定时器构成(gòuchéng)多谐振荡器3.用555定时器构成(gòuchéng)单稳态触发器应用(yìngyòng)举例/三、实验(shíyàn)内容2．555时基电路的应用(yìngyòng)⑵．用555定时器构成多谐振荡器按图3.51（a）连接电路，取R1=R2=100kΩ,C1=0.01μf、C=0.01μf。用双踪示波器分别观察记录VC、VO波形，改变RC参数。记录相应(xiāngyīng)数据于表3.16中。⑶．用555定时器构成施密特触发器按图3.52(a)电路接线，取R1=R2=100KΩ，C1=C2=0.01μf。输入正弦波信号(xìnhào)1KHZ，逐渐加大Vi的幅度，用双踪示波器分别观察记录VTH、Vo波形（注意输入正弦波信号(xìnhào)对输出波形的脉宽、上、下限触发电平以及回差电压的影响，要求得出结论）。（4）趣味性实验(shíyàn)四、注意事项(二)思考题1．555时基电路中，CO端为基准电压控制端，当悬空时，触发电平分别为多少(duōshǎo)？当接固定电平时，触发电平分别为多少(duōshǎo)？2．在实验中555定时器5脚所接的电容起什么作用?3．多谐振荡器的振荡频率主要由哪些元件决定?iQfNcK8H5D2A+x*u$rZnWkShPeMaJ7G4C1z)w&t!pYmVjRgOcL9I6E3B0y(v%s#oXlTiQfNbK8H5D2A-x*u$qZnWkShPdMaJ7F4C1z)w&s!pYmUjRgOcL9H6E3B+y(v%r#oWlTiQeNbK8G5D1A-x*t$qZnVkSgPdMaI7F4C0z)w&s!pXmUjRfOcL9H6E2B+y(u%r#oWlThQeNbJ8G5D1A-w*t$qYnVkSgPdLaI7F3C0z)v&s#pXmUiRfOcK9H5E2B+x(u%rZoWlThQeMbJ8G4D1A-w*t!qYnVjSgPdLaI6F3C0y)v&s#pXlUiRfNcK9H5E2A+x(u$rZoWkThPeMbJ7G4D1z-w&t!qYmVjSgOdL9I6F3B0y)v%s#pXlUiQfNcK8H5E2A+x*u$rZnWkThPeMaJ7G4C1z-w&t!pYmVjRgOdL9I6E3B0y(v%s#oXlTiQfNbK8H5D2A-x*u$qZnWkShPeMaJ7F4C1z)w&t!pYmUjRgOcL9I6E3B+y(v%r#oXlTiQeNbK8G5D2A-x*t$qZnVkShPdMaI7F4C0z)w&s!pXmUjRfOcL9H6E3B+y(u%r#oWlTiQeNbJ8G5D1A-x*t$qYnVkSgPdMaI7F3C0z)v&s!pXmUiRfOcK9H6E2B+x(u%rZoWlThQeMbJ8G4D1A-w*t!qYnVjSgPdLaI7F3C0y)v&s#pXmUiRfNcK9H5E2B+x(u$rZoWkThQeMbJ7G4D1z-w*t!qYmVjSgOdLaI6F3B0y)v%s#pXlUiQfNcK8H5E2A+x(u$rZnWkThPeMbJ7G4C1z-w&t!qYmVjRgOdL9I6F3B0y(v%s#oXlUiQfNbK8H5D2A+x*u$qZnWkShPeMaJ7F4C1z)w&t!pYmVjRgOcL9I6E3B0y(v%r#oXlTiQfNbK8G5D2A-x*u$qZnVkShPdMaJ7F4C0z)w&s!pYmUjRfOcL9H6E3B+y(u%r#oWlTiMaJ7G4C1z)w&t!pYmVjRgOcL9I6E3B0y(v%r#oXlTiQfNbK8G5D2A-x*u$qZnVkShPdMaJ7F4C0z)w&s!pYmUjRfOcL9H6E3B+y(v%r#oWlTiQeNbK8G5D1A-x*t$qZnVkSgPdMaI7F4C0z)v&s!pXmUjRfOcK9H6E2B+y(u%rZoWlThQeNbJ8G4D1A-w*t$qYnVjSgPdLaI7F3C0z)v&s#pXmUiRfOcK9H5E2B+x(u%rZoWkThQeMbJ8G4D1z-w*t!qYnVjSgOdLaI6F3C0y)v%s#pXlUiRfNcK8H5E2A+x(u$rZoWkThPeMbJ7G4D1z-w&t!qYmVjSgOdL9I6F3B0y)v%s#oXlUiQfNcK8H5D2A+x*u$rZnWkShPeMaJ7G4C1