Introduction

Abstract

Analog circuits are fundamentally necessary in many complex and high-performance systems although digital signal processing is becoming increasingly more powerful and many types of signal processing have indeed moved to digital domain due to the advances in IC technology which provides compact and efficient implementation of these algorithms in silicon. This is caused by the reality that naturally occurring signals are analog.This book discusses the new possibilities in analog circuit design including applications on communication, measurement, and RF systems, combining the main features for the circuit design with actual circuit realizations and demonstrating several performance limitations on chosen circuit examples.The book is organized as follows. After a short introduction of the problem in this chapter, different structures based on OTA (operational transconductance amplifier) have been given in Chap. 2. Also, performance limitations of these circuits are underscored to the designers. Chapter 3 describes current conveyors, variants, and applications. Chapter 4 is on the operational transresistance amplifier (OTRA). Chapter 5 discusses the FTFN: the four-terminal floating nullor and its applications. Chapter 6 is on the COA: the current operational amplifier. Chapter 7 describes CFOA: the current feedback operational amplifier. Chapter 8 is on active-only circuit design. Chapter 9 describes MOS-only and MOS-C circuits. In Chap. 10, recent advances are presented on the basis of versatile active elements. DTMOS-based ultra-low-voltage low-power circuit design is discussed in Chap. 11. Chapter 12 describes high-precision current-mode circuits based on the MOS translinear principle. Concluding remarks are given to the designers at the end of the chapters.KeywordsAnalog circuitsNew possibilities in analog circuit designAnalog filtersOscillatorsActive elementsCMOS circuits