Design of Resistor String Digital to Analog Converter using nano Dimensional MOS Transistor for Low Power and High Speed Circuit Application

In this work the design of resistor string based digital to analog converter (DAC) using nano dimensional metal oxide semiconductor field effect transistor (MOSFET) has been demonstrated. Two bit binary word is taken as input digital data. Analog values corresponding to digital data are passes through transmission gate (TG) to output terminal. In order to clarify the functionality of the DAC, power supply voltage VDD varied from 0.5 volt to 1.2 volt. The satisfactory analog output corresponds to binary data indicates the correctness in design of the DAC. Average power consumption, conversion delay and power delay product(PDP) of the DAC is also presented in this work. The results are satisfactory context to low power and high speed very large scale integrated (VLSI) circuit application. The circuit of the DAC has been designed at 150nm channel length of MOS transistor using Tanner SPICE (T-SPICE) software.