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A Low Temperature Coefficient Bandgap Voltage Reference with Curvature Compensation

Lu Feng

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Abstract

A bandgap circuit capable of generating a reference voltage of 0.72 V with curvature compensation was proposed for a bus transceiver.The circuit was designed and manufactured based on SMIC's 0.18 μm CMOS process.Simulation and measured results showed that the circuit had a current consumption of 100 μA at 1.5 V supply power,and from 1.3 V to 1.8 V,it achieved a temperature coefficient of 1.12×10-5 V/℃ and a PSRR of 84 dB in the temperature range from-40 ℃ to 125 ℃.

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A bandgap circuit capable of generating a reference voltage of 0.72 V with curvature compensation was proposed for a bus transceiver.The circuit was designed and manufactured based on SMIC's 0.18 μm CMOS process.Simulation and measured results showed that the circuit had a current consumption of 100 μA at 1.5 V supply power,and from 1.3 V to 1.8 V,it achieved a temperature coefficient of 1.12×10-5 V/℃ and a PSRR of 84 dB in the temperature range from-40 ℃ to 125 ℃.

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Available abstract

A bandgap circuit capable of generating a reference voltage of 0.72 V with curvature compensation was proposed for a bus transceiver.The circuit was designed and manufactured based on SMIC's 0.18 μm CMOS process.Simulation and measured results showed that the circuit had a current consumption of 100 μA at 1.5 V supply power,and from 1.3 V to 1.8 V,it achieved a temperature coefficient of 1.12×10-5 V/℃ and a PSRR of 84 dB in the temperature range from-40 ℃ to 125 ℃.

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

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