Design of a Low Temperature Drift Bandgap Reference Circuit with Second-order Curvature Compensation
Science Discovery
Volume 8, Issue 3, June 2020, Pages: 46-51
Received: Jun. 28, 2020; Published: Jun. 29, 2020
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Authors
Can Guo, Sichuan Institute of Solid-State Circuits, China Electronics Technology Group Corp., Chongqing, P. R. China
Rui Xu, Sichuan Institute of Solid-State Circuits, China Electronics Technology Group Corp., Chongqing, P. R. China
Jun Pan, Sichuan Institute of Solid-State Circuits, China Electronics Technology Group Corp., Chongqing, P. R. China
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Abstract
In order to improve the accuracy and stability of bandgap reference output voltage, a bandgap reference circuit with high power supply rejection ratio and low temperature drift is designed based on 0.18um BCD technology. Based on the traditional bandgap voltage reference structure, this paper designs a current mirror cascade and a prereference circuit to supply power to the bandgap reference, and achieves a high power rejection ratio. At the same time, a PTAT2 current generation circuit is designed to realize the second-order temperature compensation of the reference output voltage. The simulation results show that the power supply voltage is 5V, PSRR is - 80dB, the temperature changes from - 55°C to 125°C, and the reference voltage temperature coefficient is 4.27ppm /°C. The circuit is simple in structure and easy to integrate. It can be widely used in bandgap reference circuit design.
Keywords
Second Order Curvature Compensation, Low Temperature Drift, High Power Rejection ratio
To cite this article
Can Guo, Rui Xu, Jun Pan, Design of a Low Temperature Drift Bandgap Reference Circuit with Second-order Curvature Compensation, Science Discovery. Vol. 8, No. 3, 2020, pp. 46-51. doi: 10.11648/j.sd.20200803.11
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