Open AccessDesign and Implementation of Op-Amp Based Low-Power CMOS Bandgap Voltage Reference with Minimum Supply oF 0.8-V
Author(s) -
P. Arivazhagan
Publication year - 2013
Publication title -
bonfring international journal of power systems and integrated circuits
Language(s) - English
Resource type - Journals
eISSN - 2277-5072
pISSN - 2250-1088
DOI - 10.9756/bijpsic.10229
Subject(s) - bandgap voltage reference , voltage reference , power supply rejection ratio , voltage , cmos , operational amplifier , electrical engineering , silicon bandgap temperature sensor , low voltage , electronic engineering , chip , power (physics) , materials science , amplifier , dropout voltage , engineering , physics , quantum mechanics
A low power voltage source is generated by altering the device size in existing topology has been presented. Bandgap voltage reference is generated by combination of start-up, supply independent, operational amplifier (Op-amp) and bandgap core circuits which has been designed such that low sensitivity of temperature and supply variation. It has been designed with minimum supply of 0.8 V without use of low threshold device, and the maximum supply current is 35 ?A. It has been implemented in 180 nm standard digital CMOS Process. The circuit generates a reference voltage of 540 mV and has a temperature coefficient of 14 ppm /?C from −40 ?C to 120 ?C. The generated reference voltage is independent of temperature and supply variations have been mathematically proved by analyzing the circuit design. Also, proper selection of on-chip passive components and its values has been chosen which is based on low noise. Comparing the pre and post layout simulation results has been presented
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