chapter3-inverter01 - Digital Integrated Digital Integrated...

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igital Integrated Digital Integrated ircuits Circuits YuZhuo Fu contact:[email protected] Office location 417 room WeiDianZi building,No 800 DongChuan road,MinHang Campus Digital IC Introduction
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utline outline CMOS at a glance CMOS static behavior CMOS dynamic behavior Power, Energy, and Energy Delay •P e r s pective tech. Digital IC 2/48 0: Introduction
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ctivity Activity 1) If the width of a transistor increases, the current will increase decrease not change 2) If the length of a transistor increases, the current will increase decrease not change 3) If the supply voltage of a chip increases, the maximum transistor current will increase decrease not change 4) If the width of a transistor increases, its gate capacitance will ) ,g p increase decrease not change 5) If the length of a transistor increases, its gate capacitance will crease ecrease ot change increase decrease not change 6) If the supply voltage of a chip increases, the gate capacitance of each transistor will increase decrease not change Digital IC 3/48 0: Introduction
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ctivity Activity 1) If the width of a transistor increases, the current will increase decrease not change 2) If the length of a transistor increases, the current will increase decrease not change 3) If the supply voltage of a chip increases, the maximum transistor current will increase decrease not change 4) If the width of a transistor increases, its gate capacitance will ) ,g p increase decrease not change 5) If the length of a transistor increases, its gate capacitance will crease ecrease ot change increase decrease not change 6) If the supply voltage of a chip increases, the gate capacitance of each transistor will increase decrease not change Digital IC 4/48 0: Introduction
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CMOS Inverter V DD V DD PMOS N Well ut PMOS 2 λ Contacts Out In In Out Metal 1 NMOS Polysilicon GND NMOS Digital IC 5/48 0: Introduction
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First Glance of CMOS A First Glance of CMOS A switch with infinite off-resistance and a finite on- resistance • When V s <V t MOS is off g • whenV gs >V t MOS is on just like a resistance R on whenV =Vdd nMOS on pMOS off in When V in =0 pMOS off nMOS on |V GS | R on Digital IC | < |V T | |V GS | > |V T | 6
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Two Inverters hare power and ground Share power and ground Abut cells onnect in Metal V DD Connect in Metal Digital IC 7/48 0: Introduction
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CMOS Inverter First-Order DC Analysis V DD V DD V OL = 0 H = V D R p V OH V DD V M = f(R n , R p ) V out V out R n Digital IC V in 5 V DD V in 5 0 8/48 0: Introduction
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CMOS Inverter: Transient Response D D t HL = f(R n .C ) R V DD V DD pHL on L = 0.69 R on C L p V out V out C C L R n L V in 5 V DD V in 5 0 ) Low- - igh ) High- - w Digital IC (a) Low to high (b) High to low 9/48 0: Introduction
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C Response DC Response C Response: s V r a gate DC Response: V out vs. V in for a gate Ex: Inverter hen V 0 > VDD When V in = 0 => V out = VDD • When V in = VDD => V out = 0 • In between, V out depends on transistor V DD , p size and current
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This note was uploaded on 03/01/2012 for the course MR 310 taught by Professor Fuyuzhuo during the Spring '10 term at Shanghai Jiao Tong University.

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chapter3-inverter01 - Digital Integrated Digital Integrated...

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