CMOS Nchannel MOSFET Pchannel MOSFET Complementary MOSCMOS VDD Slides: 63 Download presentation 天才設計-CMOS反相器 由N-channel MOSFET及 P-channel MOSFET 組合而成,兩者具有互補作用,故稱為 Complementary MOS(CMOS)。 VDD Qp Vi Vo Qn 7 4 3 5 28 1 6 用一顆P-channel MOSFET取代簡 單反相器中的R CMOS反相器特性 電壓轉換曲線 Ø 假設使用enhancement-type的 MOSFET,Vtn及Vtp 分別表示 Qn及Qp的臨界電壓(Vtn為正值, Vtp為負值)且Vtn = |Vtp| = Vt 。 Vo VOH = VDD slope = 1 Ø Qn:VGS = Vi VDS = Vo VGS, eff = Vi Vt slope = 1 VOL = 0 VIL VIH VDD 7 4 3 5 28 1 6 Ø QP: VSG = VDD Vi VSD = VDD Vo Vi VSG, eff = VDD Vi Vt BJT轉換特性 數位電路的應用上主要將BJT 作在cutoff 及saturation兩個mode VCC RC Vo Vi Q 7 4 3 5 28 1 6 由於PN-junction內部的 電容效應,使得BJT無 法瞬間由cutoff mode轉 換至saturation mode, 反之亦然。 Resistor-Transistor Logic (RTL) 當Vi = VCC時: 必須適當選擇RB和RC,才能使BJT 作在 saturation mode。所以: 7 4 3 5 28 1 6 TTL邏輯電路 TTL inverter的標準電路 VCC = 5 V R 3 4 K R 4 130 R 2 1. 6 K Q 2 Vi Q 3 Q 4 VBE(ON) = 0. 7 V VCE(sat) = 0. 2 V D Vo Q 1 R 1 1 K 7 4 3 5 28 1 6 Ø 當Vi = VH,各個電晶體的 作模式為: Q 4:inverse active mode Q 3:saturation mode Q 1:saturation mode Q 2:cutoff mode D:OFF Ø 當Vi = VL(假定VL = 0. 2 V), 各電晶體 作模式為: Q 4:saturation mode Q 3:cutoff mode Q 1:cutoff mode Q 2:active mode D:ON TTL特性 電壓轉換曲線 在輸出端不接任何邏輯 閘的情況下: Vo 3. 7 V VOH 3. 7 V,VOL 0. 1 V 2. 7 V VIH 1. 4 V,VIL 0. 5 V 0. 1 V 0. 5 1. 2 1. 4 7 Vi(V) 4 3 5 28 1 6 NML = VIL – VOL = 0. 4 V NMH = VOH – VIH = 2. 3 V Vdd mosfetFolded cascodeCm=n/vddPwellVdd mVdd vinVcc vs vddDefine noise marginVbcDynamic nand gateDiode layout in cmosGsense400Cmos certificationVgCmosComparison of logic families tableIn cmos inverters, super-buffers haveAnigay cmosCmos layout design rulesGanged cmos logicOutrlEder chavezCompound gates in vlsiSti effect in layoutCmosCmosCmos inverter cross sectional viewGanged cmosCmos amplifierSoi vs bulk cmosCmos op ampLayoutY=a+bc using cmosPmos cs amplifierCmos lc oscillatorCmos inverter small signal modelCmos leakage currentDevice modeling for analog and rf cmos circuit designCmos inverter analysisInverter vtcXccbxComplex cmos logic gatesCmosCmos vlsi design lecture notesQtransmissionCmos vtcCmos technologyCmos circuitGanged cmosCmos differential amplifierCmos process flowsCmos op ampRtl inverterRegenerative property of cmos inverterCmosStandart cmos setupStandard cmos featuresCmos backplanePoly resistor layoutP well fabrication processCmos vs ttlCcd vs cmosIntel cmosJk tároló