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2008•Journal of Hangzhou Dianzi UniversityRequires access

Design of High Precision Bandgap Voltage Reference Based on Second-order Compensation Technique

Hui Hong

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Abstract

A high precision,low temperature coefficient and low power bandgap reference with a start-up circuit is designed on the charter 0.35μm CMOS technology.The circuit is developed based on the conventional bandgap reference,and achieved second-order compensation using a temperature dependent resistor ratio generated by the different kinds of resistors.The simulation results show that the circuit delivers an output voltage of 1.149 V and achieves a temperature coefficient of 4.9 ppm/ °C over the range from-40 ℃to 120 ℃.The power consumption of the circuit is only 57uW.

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What this paper is about

A high precision,low temperature coefficient and low power bandgap reference with a start-up circuit is designed on the charter 0.35μm CMOS technology.The circuit is developed based on the conventional bandgap reference,and achieved second-order compensation using a temperature dependent resistor ratio generated by the different kinds of resistors.The simulation results show that the circuit delivers an output voltage of 1.149 V and achieves a temperature coefficient of 4.9 ppm/ °C over the range from-40 ℃to 120 ℃.The power consumption of the circuit is only 57uW.

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Available abstract

A high precision,low temperature coefficient and low power bandgap reference with a start-up circuit is designed on the charter 0.35μm CMOS technology.The circuit is developed based on the conventional bandgap reference,and achieved second-order compensation using a temperature dependent resistor ratio generated by the different kinds of resistors.The simulation results show that the circuit delivers an output voltage of 1.149 V and achieves a temperature coefficient of 4.9 ppm/ °C over the range from-40 ℃to 120 ℃.The power consumption of the circuit is only 57uW.

Key concepts: Bandgap voltage reference, Temperature coefficient, Resistor, Silicon bandgap temperature sensor, Voltage reference, Compensation (psychology), CMOS, Materials science

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