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A High Precision Current-Mode CMOS Bandgap Voltage Reference

Cui Jiaji

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Abstract

A high precision current-mode CMOS bandgap voltage reference source was designed based on CSMC 0.5 μm standard CMOS process. The simulation results showed that the temperature coefficient of the output voltage wss 1.3×10-5 / in a range of temperature from ℃-40 to 125 ℃ ℃, the output voltage had a change of 0.076 mV when the power supply voltage varies from 3.3 to 5 V, and the PSRR was-89 dB. At the same time, the output voltage could be adjusted under different process corners by adopting the trimming circuit, and the reference circuit features low temperature coefficient, high power supply rejection ratio and high precision.

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What this paper is about

A high precision current-mode CMOS bandgap voltage reference source was designed based on CSMC 0.5 μm standard CMOS process. The simulation results showed that the temperature coefficient of the output voltage wss 1.3×10-5 / in a range of temperature from ℃-40 to 125 ℃ ℃, the output voltage had a change of 0.076 mV when the power supply voltage varies from 3.3 to 5 V, and the PSRR was-89 dB. At the same time, the output voltage could be adjusted under different process corners by adopting the trimming circuit, and the reference circuit features low temperature coefficient, high power supply rejection ratio and high precision.

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Available abstract

A high precision current-mode CMOS bandgap voltage reference source was designed based on CSMC 0.5 μm standard CMOS process. The simulation results showed that the temperature coefficient of the output voltage wss 1.3×10-5 / in a range of temperature from ℃-40 to 125 ℃ ℃, the output voltage had a change of 0.076 mV when the power supply voltage varies from 3.3 to 5 V, and the PSRR was-89 dB. At the same time, the output voltage could be adjusted under different process corners by adopting the trimming circuit, and the reference circuit features low temperature coefficient, high power supply rejection ratio and high precision.

Key concepts: Bandgap voltage reference, Power supply rejection ratio, Voltage reference, Trimming, CMOS, Temperature coefficient, Voltage, Materials science

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