A 0.6V 1.76nW power on reset circuit with high accuracy

• Main Authors: Hu, X. (Author), Qiao, S. (Author), Ren, X. (Author), Shi, D. (Author), Wang, Y. (Author), You, H. (Author), Zhou, Y. (Author)
• Format: Article
• Language: English
• Published: Institute of Electronics Information Communication Engineers 2022
• Subjects: brown out detection; Brown out detection; high accuracy; High-accuracy; Low power electronics; Low voltages; power on reset; Power-on resets; Quiescent currents; Reset circuits; Temperature stability; Timing circuits; ultra-low power; Ultra-low power; Voltage deviations; Voltage measurement; Voltage reference
• Online Access: View Fulltext in Publisher
• ISBN: 13492543 (ISSN)
• DOI: 10.1587/elex.19.20220119

A low voltage high-accuracy power on reset circuit with an ultra-low quiescent current is proposed in this paper. The circuit employs a 5-transistor voltage reference with a good temperature stability instead of bandgap to provide a precise reference voltage, which is compared with the supply voltage to generate an accurate trip voltage. A 4-transistor complementary-to-absolute-temperature voltage reference is proposed for temperature compensation and reduces significantly the trip voltage deviation. The proposed circuit is implemented in 55-nm CMOS process with an area of 2080 μm2. The measurement results show that the trip-voltage deviation is only 5mV from -40°C to 125°C. And it achieves a power consumption of 1.76nW at 0.6V. © 2022 The Institute of Electronics.