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A Low Temperature Coefficient Bandgap Voltage Reference with Output Buffer

YU Jian-guo

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Abstract

A high performance bandgap voltage reference is proposed, with low temperature coefficient, wide operation temperature range and an output buffer. The prototype is implemented in TSMC 0.18 μm standard CMOS technology. The simulation results for this circuit show that the average temperature coefficient is about 7.25×10-6/℃ and the output reference voltage is 2.302 0 V±0.001 5 V over the -40 ℃ to +110 ℃ temperature range. The PSRR of this circuit is 64 dB at 11 kHz, and the power supply varies from 1.6 V to 4.3 V. The output noise is 5.018 at 1 kHz.

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What this paper is about

A high performance bandgap voltage reference is proposed, with low temperature coefficient, wide operation temperature range and an output buffer. The prototype is implemented in TSMC 0.18 μm standard CMOS technology. The simulation results for this circuit show that the average temperature coefficient is about 7.25×10-6/℃ and the output reference voltage is 2.302 0 V±0.001 5 V over the -40 ℃ to +110 ℃ temperature range. The PSRR of this circuit is 64 dB at 11 kHz, and the power supply varies from 1.6 V to 4.3 V. The output noise is 5.018 at 1 kHz.

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Available abstract

A high performance bandgap voltage reference is proposed, with low temperature coefficient, wide operation temperature range and an output buffer. The prototype is implemented in TSMC 0.18 μm standard CMOS technology. The simulation results for this circuit show that the average temperature coefficient is about 7.25×10-6/℃ and the output reference voltage is 2.302 0 V±0.001 5 V over the -40 ℃ to +110 ℃ temperature range. The PSRR of this circuit is 64 dB at 11 kHz, and the power supply varies from 1.6 V to 4.3 V. The output noise is 5.018 at 1 kHz.

Key concepts: Bandgap voltage reference, Temperature coefficient, Power supply rejection ratio, Voltage reference, Buffer (optical fiber), Materials science, Voltage, CMOS

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