A sub-1ppm/℃ current-mode CMOS bandgap reference with wide input and high PSRR
A novel high-order curvature-compensated bandgap voltage reference (BGR) is proposed with the 0.18<i>um</i> BCD process, by adding low-temperature and high-temperature piecewise compensation current to the conventional curvature-compensated BGR, which realizes a reference voltage with a lower temperature coefficient. At the same time, a pre-regulator circuit is added before the BGR to adapt to the power supply voltage of 8V~36V. Simulation results show that a stable 5V voltage is obtained to supply power to the BGR after the pre-voltage regulator. Meanwhile, the temperature coefficient of the proposed BGR is only 0.39ppm/°C in the range of -40°C~165°C. The high-order curvature-compensated BGR achieves the power supply rejection ratio (PSRR) of 143dB, 140dB, 117dB, 82dB and 38dB at 10Hz, 1kHz, 10kHz, 100kHz and 1MHz respectively.
Authors
- Dansheng Zhang
- Liang Yin (ORCID: https://orcid.org/0000-0002-6230-374X)
Institutions
- Harbin Institute of Technology (CN)
Publication Details
- Published
- 2025-07-24
- DOI
- https://doi.org/10.1117/12.3068936
- Primary Topic
- Analog and Mixed-Signal Circuit Design
- Type
- article
- Field-Weighted Citation Impact
- 0.00