A Low-Power and Wide-Range MEMS Capacitive Sensors Interface IC Using Pulse-Width Modulation for Biomedical Applications

2016 ◽  
Vol 16 (17) ◽  
pp. 6745-6754 ◽  
Author(s):  
Md Shamsul Arefin ◽  
Jean-Michel Redoute ◽  
Mehmet Rasit Yuce
Keyword(s):  
Low Power ◽  
Pulse Width ◽  
Biomedical Applications ◽  
Pulse Width Modulation ◽  
Capacitive Sensors ◽  
Wide Range

Low Power Converter for Capacitive Sensors Using Capacitance-to-Pulse Width Modulation

2018 ◽  
Author(s):  
Arexius Vico Balde ◽  
John Owen Cabuyadao ◽  
Chris Vincent Densing ◽  
John Richard Hizon ◽  
Marc Rosales ◽  
...  
Keyword(s):  
Low Power ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Power Converter ◽  
Capacitive Sensors

A Temperature-Stable Low-Power Wide-Range CMOS Voltage Controlled Oscillator Design for Biomedical Applications

2019 ◽  
Vol 29 (08) ◽  
pp. 2050128
Author(s):  
Zied Sakka ◽  
Nadia Gargouri ◽  
Mounir Samet
Keyword(s):  
Low Power ◽  
Biomedical Applications ◽  
Cmos Technology ◽  
Average Frequency ◽  
Absolute Temperature ◽  
Ring Oscillator ◽  
Frequency Variation ◽  
Control Voltage ◽  
Voltage Controlled Oscillator ◽  
Wide Range

This paper presents a low power temperature compensated CMOS ring oscillator for biomedical applications across a wide temperature range. The proposed circuit deploys an IPTAT (inversely proportional to absolute temperature) bias current by generating an adaptive control voltage in each stage of the oscillator to compensate the overall oscillator’s temperature coefficient (TC). Simulations using TSMC 0.18[Formula: see text][Formula: see text]m CMOS technology show that this configuration can achieve a frequency variation less than 0.25%, leading to an average frequency drift of 20.83[Formula: see text]ppm/∘C. Monte Carlo simulations have also been performed and demonstrate a 3[Formula: see text] deviation of about 2.15%. The power dissipated by the proposed circuit is only 8.48[Formula: see text]mW at 25∘C.

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