Compact models of devices are used in circuit simulators, in order to predict the functionality of circuits. Multiple-gate devices will be preferred in nanoscale circuits, thus calling for accurate and reliable compact models, an important prerequisite for successful circuit design. In this book we present explicit compact charge and capacitance models adapted for doped and undoped devices (doped Double-Gate (DG) MOSFETs, undoped DG MOSFETs, undoped Ultra-Thin-Body (UTB) MOSFETs and undoped Surrounding-Gate Transistors (SGTs)). The main advantage of our work is the analytical and explicit...