Efficient analog signal processing in nm CMOS technologies

Abstract

Summary form only given. In nanometer CMOS technologies, several new phenomena occur as a result of the shorter channel-lengths. The most important ones are velocity saturation and gate leakage currents. As a result analog signal processing suffers from reduced accuracy and more noise. Also the transconductance and speed are both limited by velocity saturation. Moreover the supply voltage has been reduced to values around 1 Volt, creating new challenges for analog signal processing. This presentation provides an overview of these phenomena. They are illustrated by a review of the most important building blocks for analog signal processing in nm CMOS technologies. Amplifiers and filters are discussed and compared based on generally accepted FOM (Figures of Merit). It is followed by an overview of sub-1 Volt circuits for various applications. Rail-to-rail amplifiers and amplifiers/filters configurations are given with both Gate and Bulk drives.