Modern VLSI Design: IP-Based Design, Fourth Edition

3Logic Gates

Highlights:

Combinational logic.Static logic gates.Delay and power.Alternate gate structures: switch, domino, etc.Wire delay models.Design-for-yield.Gates as IP.

An AOI-21 gate (Figure 3-7).

3.1 Introduction

This chapter concentrates on the design of combinational logic gates. The knowledge gained in the last chapter on fabrication is important for combinational logic design—technology-dependent parameters for minimum size, spacing, and parasitic values largely determine how big a gate circuit must be and how fast it can run.

We will start by reviewing some important facts about combinational ...