CMOS D/A converter using current conveyor analogue switches

Abstract

This paper presents a new digital-to-analog (D/A) converter circuit using second-generation current conveyors (CCIIs) which works as analogue switches. In this case, CCII is worked as current conveyor analogue switch (CCAS). A bit stream of digital code is used to control the switch for obtaining the current level at the output terminal. Then, bits D/A converter can be obtained simply by parallel connecting of CCASs. The proposed structure is suitable for low power supply voltage. The simulation results are used to confirm the workability of the proposed structure.