三极管开关电路分析

||||RSS..-,.!027-87775851:..,,,(USB)45.0→→GoogleRCRCPlaneLED2009-10-1719:56:14:2801201105130700271RS232TLC0831A/DupsIRF-1Vin(open)(closed)Vin(cutoff)Vin(saturation)8380.6Vin0.6Vin0.3(838)VinVccVcE0(1)ICIBβββVin(1)Vin(2)(2)1(mechanicalactuator)(solenoidplunger)(relayarmature)TIP42-TIP42CTIP41C-TIP42N3905-2N39062N3903-2N3904CD4027-NE555C-MOSPWM1-WireMAX1669-NPNNPN12()2(1)21.5AVCEVCE=0VCE()0.2VCE()0.1VCE()VCE()VCE()0VCE()3(a)(3(b))PWMLED34412(ms)(μs)3(bounce)45VEC0VCEVCCVCEVCCVinVinVinVinVBE0.6VinVBE0.6VBE1.50.2VBE1VBE1.5VBEVCEVCEVCCVCE5Vin0.66(a)(b)66(a)0.6Vin0.66(b)-(hold-off)R2R1R2Vin6(b)(IB0)R1R2R1(Vin)VinVin(Vin=0.6)-0.6R1R2VBBVin-(speed-upcapacitors)7RBVin77(pF)88(Totem-poleswitches)8(RLD)RC(RC)99Q1Q2Q1VCCQ1Q2Q2Q1(9)Q1Q1“”“(pullup)”Q2“(pulldown)”9Q1Q2Q1Q2VCCQ1Q26-4Q1Q2Q1Q210(a)(flip-flop)(5)()10(b)Q1(a)(b)10Q210(a)(1)(2)(3)220(interface)110()0VCCVCC11(11)R1R2RC()111131-0:::2801ICP06002554||||||||WAP|838ChinaPoweredby?2002-2009