Page 226 - A Practical Guide from Design Planning to Manufacturing

Chapter
7

Circuit Design

Overview
This chapter covers how logic design is converted to a transistor imple-
mentation. The chapter describes the behavior of MOSFETs and how to
use them to create logic gates and sequentials as well as the electrical
checks of circuit timing, noise, and power.

Objectives
Upon completion of this chapter the reader will be able to:

1. Describe the regions of operation of a MOSFET.
2. Describe the differences between NMOS and PMOS devices.
3. Draw circuit diagrams for CMOS logic gates.
4. Understand fanout and how it affects circuit timing.
5. Understand P-to-N ratio and how it affects noise immunity.
6. Draw circuit diagrams for a latch and a flip-flop and understand their
operation.
7. Describe different sources of circuit noise and ways of reducing them.
8. Describe different types of power consumption and ways of reducing
them.

Introduction

Circuit design is the task of creating electrical circuits that implement the
functionality determined by logic design. Logic design and the steps before

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