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A sub-1V picowatt voltage reference with improved PSRR and line sensitivity for wearable biomedical applications.
- Source :
- Analog Integrated Circuits & Signal Processing; Feb2024, Vol. 118 Issue 2, p231-238, 8p
- Publication Year :
- 2024
-
Abstract
- This paper presents a picowatt voltage reference circuit using a voltage regulation scheme consisting of a self-regulation native N-type transistor, a double regulation topology formed by a stacked structure of two native N-type transistors, and a P-type transistor-based self-biased current source, to feed a diode-connected P-type load and a PNP transistor load. This improves the line sensitivity and the power supply rejection ratio (PSRR) without the use of an on-chip capacitor. The circuit is designed in a 180 nm CMOS process with an area of 13,700 μm<superscript>2</superscript> and operates with a minimum supply voltage of 0.8 V. Post layout simulation results show that the circuit provides a constant output voltage of 160.2 mV with a temperature coefficient (TC) of 151.6 ppm/ ∘ C from 0 to 100 ∘ C, a line sensitivity of 0.00114%/V, a PSRR of - 72.6 dB at 100 Hz, and an untrimmed voltage accuracy ( σ / μ ) of 0.99%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09251030
- Volume :
- 118
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Analog Integrated Circuits & Signal Processing
- Publication Type :
- Academic Journal
- Accession number :
- 175601776
- Full Text :
- https://doi.org/10.1007/s10470-023-02187-3