Bonfring International Journal of Power Systems and Integrated Circuits
Online ISSN: 2277-5072 | Print ISSN: 2250-1088 | Frequency: 4 Issues/Year
Impact Factor: 0.651 | International Scientific Indexing(ISI) calculate based on International Citation Report(ICR)
Design and Implementation of Op-Amp Based Low-Power CMOS Bandgap Voltage Reference with Minimum Supply oF 0.8-V
Abstract:
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 35A. 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 from −40C to 120C. 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.
Keywords: Gain Calculations, Device Mismatch, Temperature Independent Biasing, Supply Independent
Volume: 6 | Issue: 2
Pages: 07-11
Issue Date: June , 2016
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