VLSI

2 Arithmetic Implemented with Semiconductor Quantum-Dot Cellular Automata

Earl E. Swartzlander Jr., Heumpil Cho, Inwook Kong, and Seong-Wan Kim

Contents

2.1 Introduction

2.2 Introduction to QCA Technology

2.2.1 QCA Building Blocks

2.2.2 QCA Clocking

2.2.3 QCA Design Rules

2.3 QCA Adders

2.3.1 Carry-Flow Ripple Carry Adder

2.3.1.1 Basic Design Approach

2.3.1.2 Carry-Flow Full Adder Design

2.3.1.3 Simulation Results

2.3.2 Carry Lookahead Adder

2.3.2.1 Architectural Design

2.3.2.2 Schematic Design

2.3.2.3 Layout Design

2.3.2.4 Simulation Results

2.3.3 Conditional Sum Adder

2.3.3.1 Architectural Design

2.3.3.2 Schematic Design

2.3.3.3 Layout Design

2.3.4 Comparison of the QCA Adders

2.4 QCA Multipliers

2.4.1 Introduction

2.4.2 QCA Array Multipliers ...