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Low Supply Bandgap Voltage Reference

Yang Li

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Abstract

A low power and high precision CMOS bandgap voltage reference circuit is presented.Prototype of the circuit is fabricated using the 0.18 μm CMOS process.It fulfills the first order PTAT(Proportion To Absolute Temperature) temperature curvature compensation with a good PSRR(Power Supply Rejection Ratio).The measured results of this circuit at 1.5 V show that the PSRR is 47 dB.And the output voltage varies from 1.114—1.117 V which is constant within(0.269%) over the temperature range of 0-80 ℃.The power dissipation is 0.22 mW and the active area is 0.057 mm~2.

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What this paper is about

A low power and high precision CMOS bandgap voltage reference circuit is presented.Prototype of the circuit is fabricated using the 0.18 μm CMOS process.It fulfills the first order PTAT(Proportion To Absolute Temperature) temperature curvature compensation with a good PSRR(Power Supply Rejection Ratio).The measured results of this circuit at 1.5 V show that the PSRR is 47 dB.And the output voltage varies from 1.114—1.117 V which is constant within(0.269%) over the temperature range of 0-80 ℃.The power dissipation is 0.22 mW and the active area is 0.057 mm~2.

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Available abstract

A low power and high precision CMOS bandgap voltage reference circuit is presented.Prototype of the circuit is fabricated using the 0.18 μm CMOS process.It fulfills the first order PTAT(Proportion To Absolute Temperature) temperature curvature compensation with a good PSRR(Power Supply Rejection Ratio).The measured results of this circuit at 1.5 V show that the PSRR is 47 dB.And the output voltage varies from 1.114—1.117 V which is constant within(0.269%) over the temperature range of 0-80 ℃.The power dissipation is 0.22 mW and the active area is 0.057 mm~2.

Key concepts: Power supply rejection ratio, Bandgap voltage reference, Voltage reference, CMOS, Materials science, Voltage, Electrical engineering, Dissipation

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