2022年医学专题—第8章脉冲波形的产生与整形.pptVIP免费

矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩trtf0.1Vm0.5Vm0.9VmTWVmT脉冲波形参数一些(yīxiē)基本概念第一页，共八十页。第一页，共八十页。脉冲宽度Tw——从脉冲波形上升沿上升到0.5Vm起到下降(xiàjiàng)沿下降(xiàjiàng)到0.5Vm止的时间。上升时间tr——脉冲波形的上升沿从0.1Vm上升到0.9Vm所需时间。下降时间tf——脉冲波形的下降沿从0.9Vm下降到0.1Vm所需时间。占空比q——脉冲宽度Tw与脉冲周期T之比即TTqwtrtf0.1Vm0.5Vm0.9VmTWVmT脉冲波形参数第二页，共八十页。第二页，共八十页。矩矩矩矩——ǎɡɡ矩矩矩矩矩矩矩矩矩矩矩矩矩——矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩——Tf1第三页，共八十页。第三页，共八十页。矩矩矩矩ɡɡ矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩ǔɡ矩矩矩矩矩矩矩矩矩矩矩矩矩第四页，共八十页。第四页，共八十页。矩矩矩矩矩矩矩矩图8-1为双极型5G555定时器的原理电路(diànlù)和引脚排列图。V-C12348765+VCCDTHGNDTLOUTR5G5553图8-1集成(jíchénɡ)5G555定时器原理图C1+-C2+-R1R2R3VR1VR2VC1(VR)VC1(VS)RR4V-C5TH6TL21T7DQQRS12385kΩ5kΩ5kΩC1+-C2+-R1R2R3VR1VR2VC1(VR)VC1(VS)RR4V-C5TH6TL21T7DQQRS12385kΩ5kΩ5kΩ第五页，共八十页。第五页，共八十页。电阻(diànzǔ)分压器比较(bǐjiào)器基本(jīběn)RS触发器三极管开关输出缓冲器555定时器基本结构C1+-C2+-R1R2R3VR1VR2VC1(VR)VC1(VS)RR4V-C5TH6TL21T7DQQRS12385kΩ5kΩ5kΩC1+-C2+-R1R2R3VR1VR2VC1(VR)VC1(VS)RR4V-C5TH6TL21T7DQQRS12385kΩ5kΩ5kΩ第六页，共八十页。第六页，共八十页。矩矩矩矩矩矩矩矩矩矩矩矩矩Ω矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩矩...