Design and analysis of CMOS combined reference circuit

Abstract

This work presents the design of CMOS Combined Reference Circuit with Supply and Temperature compensation using 0.18 μm UMC technology. It consists of a start-up circuit, a current generator, and a voltage generator. Many current reference and voltage reference circuits have been reported. The references are used individually for generating fixed value of current or voltage for the particular use in mixed signal design. These individual current and voltage reference circuits fail, when there is a requirement of both fixed current and voltage in any circuit, e.g. a oscillator circuit requires both current and voltage reference. So the main aim of this work is to offer a design methodology for a combined reference circuit, which provides both current as well as voltage with a better supply and temperature independency.