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Design of Low Temperature-Drift Bandgap Voltage Reference with High PSRR

Zhou Guihua

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Abstract

Based on the principle of bandgap reference and current reference source with 3-branch negative feedback,a bandgap voltage reference source with 2nd-order and 3rd-order temperature compensation was designed.The circuit had a high PSRR and low temperature-drift.The design was based on 0.35 μm CMOS process.Simulation results showed that the bandgap reference source had a temperature coefficient below 7.70 × 10-7 /℃ when the temperature varied from-40 ℃ to 125 ℃,and a PSRR of-82.3 dB at 1 kHz.

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What this paper is about

Based on the principle of bandgap reference and current reference source with 3-branch negative feedback,a bandgap voltage reference source with 2nd-order and 3rd-order temperature compensation was designed.The circuit had a high PSRR and low temperature-drift.The design was based on 0.35 μm CMOS process.Simulation results showed that the bandgap reference source had a temperature coefficient below 7.70 × 10-7 /℃ when the temperature varied from-40 ℃ to 125 ℃,and a PSRR of-82.3 dB at 1 kHz.

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Available abstract

Based on the principle of bandgap reference and current reference source with 3-branch negative feedback,a bandgap voltage reference source with 2nd-order and 3rd-order temperature compensation was designed.The circuit had a high PSRR and low temperature-drift.The design was based on 0.35 μm CMOS process.Simulation results showed that the bandgap reference source had a temperature coefficient below 7.70 × 10-7 /℃ when the temperature varied from-40 ℃ to 125 ℃,and a PSRR of-82.3 dB at 1 kHz.

Key concepts: Bandgap voltage reference, Power supply rejection ratio, Temperature coefficient, Voltage reference, Materials science, Compensation (psychology), Voltage, Band gap

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