Introduction to VLSI Design

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Course Objectives

CMOS Processing and Layout
Understand the VLSI manufacturing process.
Have an appreciation of current trends in VLSI manufacturing.
Understand layout design rules.
Design and analyze layouts for simple digital CMOS circuits
Design and analyze hierarchical circuit layouts.
Understand ASIC Layout styles.

Roadmap for the term: major topics

VLSI Overview
CMOS Processing & Fabrication
Components: Transistors, Wires, & Parasitics
Design Rules & Layout
Combinational Circuit Design & Layout
Sequential Circuit Design & Layout
Standard-Cell Design with CAD Tools & Verilog
Mixed Signal Concerns: D/A, A/D Conversion
Design Project: Complete Chip

IC Evolution

SSI – Small Scale Integration (early 1970s)
contained 1 – 10 logic gates
MSI – Medium Scale Integration
logic functions, counters
LSI – Large Scale Integration
first microprocessors on the chip
VLSI – Very Large Scale Integration
now offers 64-bit microprocessors, complete with cache memory (L1 and often L2), floating-point arithmetic unit(s), etc.


Transistor Switch Model
NFET or n transistor
on when gate H
"good" switch for logic L
"poor" switch for logic H
"pull-down" device
PFET or p transistor
on when gate L
"good" switch for logic H
"poor" switch for logic L
"pull-up" device