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A high PSRR bandgap reference with piecewise curvature compensation
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Chunxiao ZHU1, 2, Hua WU1, Yuhan ZHOU1, Jiawei CHENG1, Xianguo CAO2
Electronic Components and Materials | 2025, 44(10) : 1204 - 1210
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Electronic Components and Materials | 2025, 44(10): 1204-1210
• Research & Development •
A high PSRR bandgap reference with piecewise curvature compensation
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Chunxiao ZHU1, 2, Hua WU1, Yuhan ZHOU1, Jiawei CHENG1, Xianguo CAO2
Affiliations
  • 1College of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, Jiangxi Province, China
  • 2Sichuan Xinsheng Xinguo Technology Co., Ltd., Chengdu 610000, China
Published: 2025-10-05 doi: 10.14106/j.cnki.1001-2028.2025.0021
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To address the limitations of conventional opamp-free bandgap reference architectures—specifically their high temperature coefficient and insufficient power supply rejection ratio（PSRR）performance，which fail to meet high-precision application requirements—a high-PSRR bandgap reference circuit with segmented curvature compensation was designed. The proposed bandgap reference circuit adopts a voltage self-regulation structure，which suppresses power supply ripple in the low-frequency range through a negative feedback loop and enhances the anti-interference capability of the output voltage. Furthermore，a PTAT2（proportional to absolute temperature squared）compensation circuit was integrated to generate a compensation current，enabling segmented curvature compensation and thus realizing a significant reduction in the temperature coefficient. The proposed bandgap reference circuit was designed based on the SMIC 0.18 μm CMOS process. Simulation results indicate that，at an operating voltage of 3.3V，the bandgap reference output voltage is 1.197V；over the temperature range of-45 ℃ to 125 ℃，the temperature coefficient is 5.38×10-6/℃. The PSRR of this bandgap reference at low frequencies reaches-103dB，and the circuit has a quiescent current of 14.8 μA.

bandgap reference  /  voltage self-regulation  /  piecewise curvature compensation  /  power supply rejection ratio
Chunxiao ZHU, Hua WU, Yuhan ZHOU, Jiawei CHENG, Xianguo CAO. A high PSRR bandgap reference with piecewise curvature compensation[J]. Electronic Components and Materials, 2025 , 44 (10) : 1204 -1210 . DOI: 10.14106/j.cnki.1001-2028.2025.0021
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Year 2025 volume 44 Issue 10
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Article Info
doi: 10.14106/j.cnki.1001-2028.2025.0021
  • Receive Date：2025-01-12
  • Online Date：2026-04-16
  • Published：2025-10-05
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  • Received：2025-01-12
Affiliations
    1College of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, Jiangxi Province, China
    2Sichuan Xinsheng Xinguo Technology Co., Ltd., Chengdu 610000, China
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https://castjournals.cast.org.cn/joweb/dzyjycl/EN/10.14106/j.cnki.1001-2028.2025.0021
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小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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