Abstract
In this paper, a second-order temperature compensated bandgap voltage source based on 0.18 μm standard COMS process with low temperature coefficient (TC) and high power supply rejection ratio (PSRR) was presented. The core structure of the circuit was the improvement of the traditional bandgap reference. The cascade structure was adopted to improve the PSRR and the line sensitivity, and the square of the proportional to absolute temperature current IPTAT2 was utilized to compensate the first order circuit. This circuit constitutes of all-CMOS transistors in order to save the power consumption. The simulation results show that TC of the bandgap reference source in the −25 °C–125 °C temperature range, is 4.5 ppm/°C. At low frequency, the PSRR reaches −45.63 dB@100 Hz, and the power consumption is only 287.2 μW.
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Acknowledgement
1. Project supported by the National Natural Science Foundation of China(Grant No. 61562074).
2. Project supported by the Guangxi University Science and Technology Research Project (Grant No. KY2015ZD123).
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© 2019 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Yu, J., Peng, G., Wang, K., Lv, M. (2019). Design of a All-CMOS Second-Order Temperature Compensated Bandgap Reference. In: Jia, M., Guo, Q., Meng, W. (eds) Wireless and Satellite Systems. WiSATS 2019. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 281. Springer, Cham. https://doi.org/10.1007/978-3-030-19156-6_10
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DOI: https://doi.org/10.1007/978-3-030-19156-6_10
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