Digital Integrated Circuits© Prentice Hall 1995 Devices Jan M. Rabaey The Devices.

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Presentation transcript:

Digital Integrated Circuits© Prentice Hall 1995 Devices Jan M. Rabaey The Devices

Digital Integrated Circuits© Prentice Hall 1995 Devices Goal of this chapter

Digital Integrated Circuits© Prentice Hall 1995 Devices The MOS Transistor

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

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

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

Digital Integrated Circuits© Prentice Hall 1995 Devices The Threshold Voltage

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

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

Digital Integrated Circuits© Prentice Hall 1995 Devices Transistor in Saturation

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

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

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

Digital Integrated Circuits© Prentice Hall 1995 Devices The Gate Capacitance

Digital Integrated Circuits© Prentice Hall 1995 Devices Average Gate Capacitance Most important regions in digital design: saturation and cut-off Different distributions of gate capacitance for varying operating conditions

Digital Integrated Circuits© Prentice Hall 1995 Devices Diffusion Capacitance

Digital Integrated Circuits© Prentice Hall 1995 Devices Junction Capacitance

Digital Integrated Circuits© Prentice Hall 1995 Devices Linearizing the Junction Capacitance Replace non-linear capacitance by large-signal equivalent linear capacitance which displaces equal charge over voltage swing of interest

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

Digital Integrated Circuits© Prentice Hall 1995 Devices Threshold Variations

Digital Integrated Circuits© Prentice Hall 1995 Devices Parasitic Resistances

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

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

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

Digital Integrated Circuits© Prentice Hall 1995 Devices Latchup

Digital Integrated Circuits© Prentice Hall 1995 Devices SPICE MODELS

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

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

Digital Integrated Circuits© Prentice Hall 1995 Devices SPICE Transistors Parameters

Digital Integrated Circuits© Prentice Hall 1995 Devices Fitting level-1 model for manual analysis

Digital Integrated Circuits© Prentice Hall 1995 Devices Technology Evolution