A Pressure sensor with 0.30 mmhg resolution incorporating a 4.19 pj/conv thyristor-based capacitance-To-Time converter for intra-corporeal Pressure Monitoring Applications

Article Number
8919042
Citation
Biomedical Circuits and Systems Conference (BioCAS): 8919042 (2019-10)
Contribution to Conference
Biomedical Circuits and Systems Conference, BioCAS 2019  
Publisher DOI
10.1109/BIOCAS.2019.8919042
Scopus ID
2-s2.0-85077031896
This work presents a Capacitance-To-Digital Converter for in-vivo pressure monitoring in clinical scenarios. The developed system combines a Capacitance-To-Time Converter (CTC) and a Time-To-Digital Converter (TDC), of which the CTC presents a novel architecture based on CMOS Thyristor elements with a power consumption of only 2.99 μW. The interface was implemented in a 350 nm CMOS technology and tested in combination with a commercially available capacitive pressure transducer. The Capacitance-To-Time Converter unit achieves an average pressure resolution of 0.30 mmHg while consuming 4.19 pJ/conv.
Subjects
Biomedical electronics
Capacitive transducers
Pressure sensors
Thyristor circuits