Design techniques for high-temperature analog and mixed-signal integrated circuits
department or school: Applied Science, Faculty of
department or school: Electrical and Computer Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Sadeghi, Nima
issued: 2012-08-30T16:00:02Z
issued: 2012
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Reliable high-temperature analog and mixed-signal CMOS circuits are required for several applications including aerospace, automotive control, oil field instrumentation, and pulp and paper digesters. In particular, in this work we focus on the design of key building blocks of a miniature sensor interface system that is intended to operate in a pulp and paper digester and collect and record sensory data such as pressure and temperature along its trajectory within the digester. The temperature inside the digester can be as high as 180℃. Design considerations and techniques for implementing these building blocks both at component- and circuit-levels are presented. At the component level, techniques for designing monolithic resistors with a desired temperature coefficient (TC) are proposed, and an analysis on the effects of design parameters such as resistor length, width and the number of fingers on the TC of such multi-finger resistor structures is presented. Furthermore, since the foundry-provided transistor models are typically valid up to 125℃, various NMOS and PMOS transistors with diff erent sizes are implemented to study their behaviour at high temperature. Based on our observations, a suitable sizing for transistors is suggested for circuits operating up to 200℃. At the circuit-level, several key building blocks such as bias circuits, voltage references and oscillators are designed and proof-of-concept prototypes are implemented in a standard 0.13 ㎛ CMOS process. The operation of the circuits is experimentally validated over the temperature range of interest, namely, 25 to 200℃. Also, a low-complexity resistive and capacitive temperature-compensation techniques for high-temperature relaxation oscillators is proposed. Although the temperature stability of the proposed oscillator (108 ppm/℃) compares favourably with that of state-of-the-art designs, it occupies 0.007 mm² which is 2.3 to 114 times smaller than other comparable designs. Also, the proposed circuit o…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/43092
note: Design Techniques for High-Temperature Analog and Mixed-Signal Integrated Circuits by Nima Sadeghi A thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The Faculty of Graduate Studies (Electrical and Computer Engineering) The University of British Columbia (Vancouver) August, 2012 c© Nima Sadeghi 2012 Abstract Reliable high-temperature analog and mixed-signal CMOS circuits are required for several applications including aerospace, automotive control, oil field instrumentation, and pulp and paper digesters. In particular, in this work we focus on the design of key building blocks of a miniature sensor interface system that is intended to operate in a pulp and paper digester and collect and record sensory data such as pressure and temperature along its trajectory within the digester. The temperature inside the digester can be as high as 180 ◦C. Design considerations and techniques for implementing these building blocks both at component- and circuit-levels are presented. At the component level, techniques for designing monolithic resistors with a desired temperature coefficient (TC) are pro- posed, and an analysis on the effects of design parameters such as resistor length, width and the number of fingers on the TC of such multi-finger resistor structures is presented. Furthermore, since the foundry-provided transistor models are typically valid up to 125 ◦C, various NMOS and PMOS transistors with different sizes are im- plemented to study their behaviour at high temperature. Based on our observations, a suitable sizing for transistors is suggested for circuits operating up to 200 ◦C. At the circuit-level, several key building blocks such as bias circuits, voltage references and oscillators are designed and proof-of-concept prototypes are implemented in a standard 0.13 µm CMOS process. The operation of the circuits is experimentally validated over the temperature range of interest, namely, 25 to 200 ◦C . ii Also, a lo…
has type: Thesis/Dissertation
date issued: 2013-05
is shown at: 10.14288/1.0073092
language: eng
degree discipline: Electrical and Computer Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/43092