Cover -- Title Page -- Copyright -- Contents -- Preface -- Acknowledgments -- Chapter 1 Introduction -- 1.1 Motivation -- 1.2 Contents of the Chapters -- References -- Chapter 2 Josephson Junctions -- 2.1 Josephson Equations -- 2.2 RCSJ Model -- References -- Chapter 3 dc SQUID's I-V Characteristics and Its Bias Modes -- 3.1 SQUID's I-V Characteristics -- 3.2 An Ideal Current Source -- 3.3 A Practical Voltage Source -- References -- Chapter 4 Functions of the SQUID's Readout Electronics -- 4.1 Selection of the SQUID's Bias Mode -- 4.2 Flux Locked Loop (FLL) -- 4.2.1 Principle of the FLL

4.2.2 Electronic Circuit of the FLL and the Selection of the Working Point -- 4.2.3 "Locked" and "Unlocked" Cases in the FLL -- 4.2.4 Slew Rate of the SQUID System -- 4.3 Suppressing the Noise Contribution from the Preamplifier -- 4.4 Two Models of a dc SQUID -- References -- Chapter 5 Direct Readout Scheme (DRS) -- 5.1 Introduction -- 5.2 Readout Electronics Noise in DRS -- 5.2.1 Noise Characteristics of Two Types of Preamplifiers -- 5.2.2 Noise Contribution of a Preamplifier with Different Source Resistors -- 5.3 Chain Rule and Flux Noise Contribution of a Preamplifier