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High PSRR and high-order curvature-compensated bandgap voltage reference

Qi Yu, Wan-dong Zhang, Hong Chen, Ning Ning, Chunjian Deng

Open publisher page 10 citations

Abstract

Based on the principle of piecewise compensation, a new high-order curvature compensated method of bandgap reference is presented in this paper. This method focuses on forming multiple local extrema of the curve of reference voltage instead of single valley or peak in the entire operating temperature range, which improves the temperature independence significantly. It has a temperature coefficient in the -40°C to 135°C range of 0.58 ppm/°C simulated in 0.5 μm CMOS process. Adopting the error amplifier with improved PSRR, the PSRR is -95.4dB at dc and -56dB at 100KHz with 5V power supply.

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What this paper is about

Based on the principle of piecewise compensation, a new high-order curvature compensated method of bandgap reference is presented in this paper. This method focuses on forming multiple local extrema of the curve of reference voltage instead of single valley or peak in the entire operating temperature range, which improves the temperature independence significantly. It has a temperature coefficient in the -40°C to 135°C range of 0.58 ppm/°C simulated in 0.5 μm CMOS process. Adopting the error amplifier with improved PSRR, the PSRR is -95.4dB at dc and -56dB at 100KHz with 5V power supply.

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Available abstract

Based on the principle of piecewise compensation, a new high-order curvature compensated method of bandgap reference is presented in this paper. This method focuses on forming multiple local extrema of the curve of reference voltage instead of single valley or peak in the entire operating temperature range, which improves the temperature independence significantly. It has a temperature coefficient in the -40°C to 135°C range of 0.58 ppm/°C simulated in 0.5 μm CMOS process. Adopting the error amplifier with improved PSRR, the PSRR is -95.4dB at dc and -56dB at 100KHz with 5V power supply.

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

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