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Digital Integrated Circuits© Prentice Hall 1995 Devices The MOS Transistor.

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Presentation on theme: "Digital Integrated Circuits© Prentice Hall 1995 Devices The MOS Transistor."— Presentation transcript:

1 Digital Integrated Circuits© Prentice Hall 1995 Devices The MOS Transistor

2 Digital Integrated Circuits© Prentice Hall 1995 Devices Cross-Section of CMOS Technology

3 Digital Integrated Circuits© Prentice Hall 1995 Devices MOS transistors Types and Symbols D S G D S G G S DD S G NMOS Enhancement NMOS PMOS Depletion Enhancement B NMOS with Bulk Contact

4 Digital Integrated Circuits© Prentice Hall 1995 Devices Threshold Voltage: Concept

5 Digital Integrated Circuits© Prentice Hall 1995 Devices Current-Voltage Relations

6 Digital Integrated Circuits© Prentice Hall 1995 Devices Current-Voltage Relations

7 Digital Integrated Circuits© Prentice Hall 1995 Devices Transistor in Saturation

8 Digital Integrated Circuits© Prentice Hall 1995 Devices I-V Relation

9 Digital Integrated Circuits© Prentice Hall 1995 Devices A model for manual analysis

10 Digital Integrated Circuits© Prentice Hall 1995 Devices The Sub-Micron MOS Transistor

11 Digital Integrated Circuits© Prentice Hall 1995 Devices Threshold Variations V DS VTVT

12 Digital Integrated Circuits© Prentice Hall 1995 Devices Parasitic Resistances

13 Digital Integrated Circuits© Prentice Hall 1995 Devices Velocity Saturation (1)

14 Digital Integrated Circuits© Prentice Hall 1995 Devices Velocity Saturation (2)

15 Digital Integrated Circuits© Prentice Hall 1995 Devices Sub-Threshold Conduction

16 Digital Integrated Circuits© Prentice Hall 1995 Devices Latchup

17 Digital Integrated Circuits© Prentice Hall 1995 Devices SPICE MODELS

18 Digital Integrated Circuits© Prentice Hall 1995 Devices MAIN MOS SPICE PARAMETERS

19 Digital Integrated Circuits© Prentice Hall 1995 Devices SPICE Transistors Parameters

20 Digital Integrated Circuits© Prentice Hall 1995 Devices SPICE Parameters for Parasitics

21 Digital Integrated Circuits© Prentice Hall 1995 Devices Technology Evolution

22 Digital Integrated Circuits© Prentice Hall 1995 Devices The CMOS Inverter: A First Glance

23 Digital Integrated Circuits© Prentice Hall 1995 Devices VTC of Real Inverter

24 Digital Integrated Circuits© Prentice Hall 1995 Devices Dynamic Behavior of MOS Transistor

25 Digital Integrated Circuits© Prentice Hall 1995 Devices Delay Definitions

26 Digital Integrated Circuits© Prentice Hall 1995 Devices CMOS Inverters Polysilicon In Out Metal1 V DD GND PMOS NMOS 1.2  m =2

27 Digital Integrated Circuits© Prentice Hall 1995 Devices Using Cascaded Buffers

28 Digital Integrated Circuits© Prentice Hall 1995 Devices COMBINATIONAL LOGIC

29 Digital Integrated Circuits© Prentice Hall 1995 Devices Static CMOS

30 Digital Integrated Circuits© Prentice Hall 1995 Devices Example Gate: NAND

31 Digital Integrated Circuits© Prentice Hall 1995 Devices 4-input NAND Gate In1In2In3In4 Vdd GND Out

32 Digital Integrated Circuits© Prentice Hall 1995 Devices Where Does Power Go in CMOS?

33 Digital Integrated Circuits© Prentice Hall 1995 Devices SEQUENTIAL LOGIC

34 Digital Integrated Circuits© Prentice Hall 1995 Devices Master-Slave Flip-Flop

35 Digital Integrated Circuits© Prentice Hall 1995 Devices The Ellmore Delay

36 Digital Integrated Circuits© Prentice Hall 1995 Devices The Clock Skew Problem


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