2007•Journal of Southwest University of Science and TechnologyRequires access

Design of a Band-gap Voltage Reference Source Based on CMOS Process

Li Hu

Abstract

A band-gap voltage reference circuit suitable for CMOS process is presented.Using the compensation technology through the MOS current mirror and a common source and gate current source load structure,the band-gap voltage reference source has a simple structure,low temperature coefficient and high power supply rejection ratio(PSRR).The simulation result shows that a power supply refection ratio(PSRR) of 52 dB and a temperature coefficient of 6.5 ×10-6 V/ ℃ from-20℃ to 120℃ can be obtained.It has been embedded in a trans-impedance amplifier used in optical communication,then fabricated and tested,and the perfect performance of it can fully meet the amplifier.

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Key concepts: Power supply rejection ratio, Bandgap voltage reference, Current source, Electrical engineering, Voltage reference, Current mirror, Temperature coefficient, Common gate