Statistical Analysis of a Low Power Analog Current Source

Abstract

This paper presents a low power PTAT(proportional to absolute temperature) current reference circuit, designed in 180nm scl technology and simulated using LTspice software. A resistor less circuit is designed to generate 1nA reference current(Iref) at a supply voltage(Vdd) of 0.44 V. Monte Carlo analysis of the circuit is performed with respect to two process parameters ,namely, oxide thickness(tox) and threshold voltage(vth). Individual variations as well as simultaneous variations of these parameters have been considered while analyzing the performance of the circuit. Statistical analysis, of the current values obtained, has been performed and the results have been verified through software like Python and SPSS (Statistical Package for the Social Sciences). At a later part of the project, Python automation is performed, where the LTspice software can be accessed and simulated without actually opening the software, but through Python codes.