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An amplifier‐offset‐insensitive and high PSRR subthreshold CMOS voltage reference
Author(s) -
Wang Lidan,
Zhan Chenchang,
Tang Junyao,
Li Guofeng
Publication year - 2018
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2383
Subject(s) - power supply rejection ratio , subthreshold conduction , input offset voltage , electrical engineering , operational amplifier , cmos , transistor , offset (computer science) , electronic engineering , materials science , amplifier , computer science , voltage , engineering , programming language
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.