VSD - Circuit Design & SPICE Simulations - Part 2

Overview

This is a follow-up course on my previous one "Circuit design and SPICE simulations - Part1"

It is a must, that you go through Part 1 of this course, to fully understand and apply using open source tools. This course will help you do some advanced quick SPICE simulations, while you analyze the behavior of your devices.

• Physics of MOSFET
• Run smart SPICE simulations on your own and test your own circuits

• Get better understanding of Timing Analysis

• Learn VLSI from scratch to advanced (this includes my other courses as well)

In this course we will cover:

• Voltage Transfer Characteristics - SPICE simulations
• Static behavior Evaluation : CMOS inverter Robustness
• Switching Threshold
• Noise margin
• Power supply variation
• Device variation

Objective

• Introduction
• Voltage Transfer Characteristics - SPICE simulations

• SPICE deck creation for CMOS inverter
• SPICE simulation for CMOS inverter
• SPICE deck for CMOS inverter (W/L)p = (W/L)n
• SPICE deck for CMOS Inverter (W/L)p = 2.5(W/L)n
• Model file Preview
• VTC - Quiz
• Static behavior Evaluation : CMOS inverter Robustness - Switching Threshold

• Switching Threshold, Vm
• Analytical expresssion of Vm as a function of (W/L)p and (W/L)n
• Analytical expression of (W/L/)p and (W/L)n as a function of Vm
• Static and dynamic simulation of CMOS inverter
• Static and dynamic simulation of CMOS inverter with increased PMOS width
• Applications of CMOS inverter in clock network and STA
• Switching threshold quiz
• Static behavior Evaluation : CMOS inverter Robustness - Noise Margin
• Introduction to noise margin
• Noise margin voltage parameters
• Noise margin equation and summary
• Noise margin variation with respect to PMOS width
• Noise margin quiz
• Static behavior Evaluation : CMOS inverter Robustness - Power supply variation
• Smart SPICE simulation for power supply variations
• Model file for power supply variation experiments Preview
• Power supply variation quiz
• Static behavior Evaluation : CMOS inverter Robustness - Device variation
• Sources of variation - Etching process
• Sources of variation - oxide thickness
• Smart SPICE simulation for device variations
• SPICE deck for device variation experiments
• Model file for device variation experiments
• Device variation quiz
• Conclusion

Audience Profile

• Anyone interested to know, what drives this \$Billion VLSI industry
• Anyone looking to do some practical and hands-on work on SPICE simulations
• Any professional already doing Static Timing Analysis and wants to go into details of delay models
• Anyone looking to stay for a long time in VLSI domain

Prerequisites

• Basic understanding on Industiral physical design flow, clock tree synthesis and static timing analysis to get applications of this course
• Even if you are not aware of above one's, that's even better, you can start from scratch

Tools Used

"ngSpice" is open source a mixed-level/mixed-signal circuit simulator