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A High PSRR Bandgap Reference Circuit

Quanyuan Feng

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Abstract

A novel Brokaw band-gap reference circuit was presented based on UMC's 0.6 μm BCD process.In the Brokaw bandgap reference core,an improved linear temperature curvature compensation technique was used for temperature compensation,and zeroing technique was introduced to improve the overall PSRR.HSPICE simulation results showed that the circuit had good PSRR in both high and low frequencies,and the temperature coefficient was reduced to 3.7×10-6/℃ in-40 ℃-125 ℃ range.And the output voltage variation of bandgap reference was about 670 μV with supply voltage changing from 2.5 V to 5.5 V.

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What this paper is about

A novel Brokaw band-gap reference circuit was presented based on UMC's 0.6 μm BCD process.In the Brokaw bandgap reference core,an improved linear temperature curvature compensation technique was used for temperature compensation,and zeroing technique was introduced to improve the overall PSRR.HSPICE simulation results showed that the circuit had good PSRR in both high and low frequencies,and the temperature coefficient was reduced to 3.7×10-6/℃ in-40 ℃-125 ℃ range.And the output voltage variation of bandgap reference was about 670 μV with supply voltage changing from 2.5 V to 5.5 V.

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Available abstract

A novel Brokaw band-gap reference circuit was presented based on UMC's 0.6 μm BCD process.In the Brokaw bandgap reference core,an improved linear temperature curvature compensation technique was used for temperature compensation,and zeroing technique was introduced to improve the overall PSRR.HSPICE simulation results showed that the circuit had good PSRR in both high and low frequencies,and the temperature coefficient was reduced to 3.7×10-6/℃ in-40 ℃-125 ℃ range.And the output voltage variation of bandgap reference was about 670 μV with supply voltage changing from 2.5 V to 5.5 V.

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

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