An Ultra-Low Power Temperature to Digital Converter

van Hoek, V.F.C.

An Ultra-Low Power Temperature to Digital Converter

for Medical Applications in 180 nm CMOS

Master thesis (2019)

Authors

V.F.C. van Hoek Electrical Engineering, Mathematics and Computer Science

Contributors

K. Makinwa Microelectronics (mentor)

Qinwen Fan Electronic Instrumentation (graduation committee member)

S.M. Alavi Electronics (graduation committee member)

Faculty

Electrical Engineering, Mathematics and Computer Science, Electrical Engineering, Mathematics and Computer Science

Medical ADC Implantable medical devices (IMDs) Temperature sensing Low Power Sensors Smart temperature sensor

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Published Date

09-07-2019

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

This thesis describes the design of an ultra-low power temperature to digital converter. It is intended to monitor the excess heat produced during the wireless charging of implantable medical devices such as pacemakers. The TDC is designed to achieve an accuracy of ±0.1 °C (3 sigma) from 27 °C to 47 °C, and ±0.3 °C (3 sigma) from -40 °C to 85 °C after a 1-point trim. It also achieves a resolution of 0.01 °C at 10 Sa/s. The low power consumption (155 nW) is made possible by the implementation of a self-biasing BJT-core. Its low power consumption, accuracy, and resolution make it ideally suited for clinical temperature monitoring.

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Thesis.pdf

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