Low Power Emerging Wireless Technologies

14	Design of a Frequency-Shift-Based CMOS Magnetic Sensor Array for Point-of-Care (PoC) Biomolecular Diagnosis Applications
Hua Wang and Ali Hajimiri

CONTENTS

14.1  Introduction

14.2  Sensor Mechanism

14.2.1  Sensor Operation Principle and Oscillator-Based Frequency-Shift Detection

14.2.2  Sensor Signal-to-Noise Ratio Characterization

14.3  Sensor Design Scaling Law

14.4  A CMOS Implementation Example (System Architecture)

14.5  A CMOS Implementation Example (Circuit Blocks)

14.5.1  Sensing Oscillator

14.5.2  Temperature Regulator

14.5.3  Multiplexers and Buffers

14.5.4  Divide-by-2 and Divide-by-3 Frequency Dividers

14.6  Measurement Results

14.6.1  Electrical Performance

14.6.2  Magnetic Sensing Measurements

14.7  Discussion and Conclusion ...