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A Bandgap Voltage Reference with High Power Supply Rejection Ratio

Yang Fashun

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Abstract

A novel bandgap voltage reference with simple structure was designed based on classic bandgap reference structure.Using curvature compensation technique,the bandgap voltage reference features high power supply rejection ratio(PSRR) and low temperature coefficient.This circuit was implemented in CSMC's standard 0.5 μm CMOS process.Simulation results showed that the circuit had a temperature coefficient of 3.2×10-6/℃ at 3 V supply voltage from-30 ℃ to 125 ℃ and a PSRR up to 118 dB(10 Hz) and 86 dB(1 kHz) at 27 ℃.

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What this paper is about

A novel bandgap voltage reference with simple structure was designed based on classic bandgap reference structure.Using curvature compensation technique,the bandgap voltage reference features high power supply rejection ratio(PSRR) and low temperature coefficient.This circuit was implemented in CSMC's standard 0.5 μm CMOS process.Simulation results showed that the circuit had a temperature coefficient of 3.2×10-6/℃ at 3 V supply voltage from-30 ℃ to 125 ℃ and a PSRR up to 118 dB(10 Hz) and 86 dB(1 kHz) at 27 ℃.

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Available abstract

A novel bandgap voltage reference with simple structure was designed based on classic bandgap reference structure.Using curvature compensation technique,the bandgap voltage reference features high power supply rejection ratio(PSRR) and low temperature coefficient.This circuit was implemented in CSMC's standard 0.5 μm CMOS process.Simulation results showed that the circuit had a temperature coefficient of 3.2×10-6/℃ at 3 V supply voltage from-30 ℃ to 125 ℃ and a PSRR up to 118 dB(10 Hz) and 86 dB(1 kHz) at 27 ℃.

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

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