An amplifier‐offset‐insensitive and high PSRR subthreshold CMOS voltage reference. (17th July 2017)

• Record Type: Journal Article
• Authors: Wang, Lidan; Zhan, Chenchang; Tang, Junyao; Li, Guofeng
• Is Part Of: International journal of circuit theory and applications. Volume 46:Number 2(2018)
• Page Start: 259
• Page End: 271
• Publication Date: 2017-07-17
• Subjects: CMOS -- low power -- low voltage -- power supply ripple rejection -- subthreshold -- voltage reference; Electric circuit analysis -- Periodicals; 621.319205
• DOI: 10.1002/cta.2383
• Languages: English
• ISSNs: 0098-9886

Abstract

Summary: An amplifier‐offset‐insensitive complementary metal‐oxide‐semiconductor (MOS) voltage reference (CVR) circuit with high power supply ripple rejection (PSRR) is presented. Due to the novel structure of employing subthreshold MOS transistors, the proposed CVR circuit can suppress the direct current offset effects of the internal amplifier. Design considerations in optimizing the power and area consumptions and improving the PSRR are presented. The proposed CVR circuit is implemented in a standard 0.18 μm complementary MOS process. Measured results show that the reference can run with down‐to 0.9 V supply voltage, while the power consumption is only 70 nW. The measured PSRR is better than −37 dB over the full frequency range. Abstract : An amplifier‐offset‐insensitive CMOS voltage reference (CVR) circuit with high power supply ripple rejection (PSRR) is presented. Due to the novel structure of using subthreshold MOS transistors, the proposed CVR circuit can suppress the direct current offset effects of the internal amplifier. Measured results show that the CVR can run with down to 0.9‐V supply voltage, while the power consumption is only 70 nW. The measured PSRR is better than –37 dB over the full frequency range.