[PDF] Low Power High Accuracy Smart Temperature Sensors In Cmos Technology eBook

Author : Anton Bakker
Publisher : Springer Science & Business Media
Page : 126 pages
File Size : 41,18 MB
Release : 2013-03-09
Category : Technology & Engineering
ISBN : 1475731906

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This book describes the theory and design of high-accuracy CMOS smart temperature sensors. The major topic of the work is the realization of a smart temperature sensor that has an accuracy that is so high that it can be applied without any form of calibration. Integrated in a low-cost CMOS technology, this yields at the publication date of this book one of the most inexpensive intelligent general purpose temperature sensors in the world. The first thermometers could only be read by the human eye. The industrial revolution and the following computerization asked for more intelligent sensors, which could easily communicate to digital computers. This led to· the development of integrated temperature sensors that combine a bipolar temperature sensor and an A-to-D converter on the same chip. The implementation in CMOS technology reduces the processing costs to a minimum while having the best-suited technology to increase the (digital) intelligence. The accuracy of conventional CMOS smart temperature sensors is degraded by the offset of the read-out electronics. Calibration of these errors is quite expensive, however, dynamic offset-cancellation techniques can reduce the offset of amplifiers by a factor 100 to 1000 and do not need trimming. Chapter two gives an elaborate description of the different kinds of dynamic offset-cancellation techniques. Also a new technique is introduced called the nested chopper technique. An implementation of a CMOS nested-chopper instrumentation amplifier shows a residual offset of less than lOOn V, which is the best result reported to date.

Author : Kamran Souri
Publisher : Springer
Page : 133 pages
File Size : 11,9 MB
Release : 2017-10-05
Category : Technology & Engineering
ISBN : 3319623079

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This book describes the design and implementation of energy-efficient smart (digital output) temperature sensors in CMOS technology. To accomplish this, a new readout topology, namely the zoom-ADC, is presented. It combines a coarse SAR-ADC with a fine Sigma-Delta (SD) ADC. The digital result obtained from the coarse ADC is used to set the reference levels of the SD-ADC, thereby zooming its full-scale range into a small region around the input signal. This technique considerably reduces the SD-ADC’s full-scale range, and notably relaxes the number of clock cycles needed for a given resolution, as well as the DC-gain and swing of the loop-filter. Both conversion time and power-efficiency can be improved, which results in a substantial improvement in energy-efficiency. Two BJT-based sensor prototypes based on 1st-order and 2nd-order zoom-ADCs are presented. They both achieve inaccuracies of less than ±0.2°C over the military temperature range (-55°C to 125°C). A prototype capable of sensing temperatures up to 200°C is also presented. As an alternative to BJTs, sensors based on dynamic threshold MOSTs (DTMOSTs) are also presented. It is shown that DTMOSTs are capable of achieving low inaccuracy (±0.4°C over the military temperature range) as well as sub-1V operation, making them well suited for use in modern CMOS processes.

Author : Micheal A.P. Pertijs
Publisher : Springer Science & Business Media
Page : 308 pages
File Size : 20,21 MB
Release : 2006-12-06
Category : Technology & Engineering
ISBN : 1402052588

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This book describes the analysis and design of precision temperature sensors in CMOS IC technology, focusing on so-called smart temperature sensors, which provide a digital output signal that can be readily interpreted by a computer. The text shows how temperature characteristics can be used to obtain an accurate digital temperature reading. The book ends with a detailed description of three prototypes, one of which achieves the best performance reported to date.

Author : Sining Pan
Publisher : Springer Nature
Page : 162 pages
File Size : 14,29 MB
Release : 2022-04-04
Category : Technology & Engineering
ISBN : 3030952843

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This book describes the background, principles, implementations, characterization, and future trends of temperature sensors made from silicon resistors in CMOS technology, including their readout circuits. Readers will benefit from the latest research of CMOS temperature sensors, and could learn about various precision analog techniques such as phase detection, continuous-time ΔΣ ADC, zoom ADC, FIR-DAC, dynamic element matching, OTA linearization, etc.

Author : Gerard C. M. Meijer
Publisher : CRC Press
Page : 328 pages
File Size : 49,97 MB
Release : 1994-10-27
Category : Art
ISBN :

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Thermal Sensors is intended as a comprehensive and accessible reference for designers and users of thermal sensors. Many different physical quantities can be converted easily and accurately into temperature differences using thermal techniques. These temperature differences can be detected with temperature and temperature-difference sensors. In a thermal sensor the thermal converter and the temperature sensor are combined in a single accurate device. This book gives an overview and deals with the design aspects of thermal and temperature sensors, with an emphasis on sensors based on silicon technology. The temperature sensors described are based on the use of various types of sensitive elements, such as platinum resistors, thermistors and special integrated circuits. The thermal sensors described include flow, conductivity, infrared, vacuum, humidity and calorimetric sensors, and ac-dc converters, thus providing a comprehensive overview of all thermal sensors, with practical examples of each type.

Author : Yuan Cao
Publisher :
Page : 46 pages
File Size : 22,45 MB
Release : 2015
Category :
ISBN : 9781321887921

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The development of low power CMOS technology has enabled a higher level of integration for ultra-low power applications. Among the big variety of sensor systems, temperature sensor is one of the most important and commonly used subsystem. In this thesis, a novel architecture of low power temperature sensor is proposed. In order to minimize power consumption, the temperature sensor is designed to work in subthreshold region, with a 0.5V-0.9V supply. With 62nW active power, 0.10C resolution, and 0.550C inaccuracy from 0 to 1000C, the proposed temperature sensor achieves low power consumption without degrading resolution and accuracy. The active power is highly reduced by using a novel two-amplifier reference current generator. A 17nW 30-40kHz oscillator is designed as reference clock, 13ppm temperature coefficient is achieved with resistor calibration. The supply voltage sensitivity of oscillation frequency is 1.2%/V without using LDO or regulated current source. To demonstrate the proposed topology, a chip have been designed and submitted for fabrication in 180nm CMOS technology.

Author : Feyza Berber
Publisher :
Page : pages
File Size : 37,63 MB
Release : 2006
Category :
ISBN :

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The objective of this thesis is to introduce an alternative temperature sensor in CMOS technology with small area, low power consumption, and high resolution that can be easily interfaced. A novel temperature sensor utilizing the interface-trapcharge pumping phenomenon and the temperature sensitivity of generation currentis proposed. This thesis presents the design and characterization of the proposed temperaturesensor fabricated in 0.18 [mu] CMOS technology. The prototype sensor is characterized for the temperature range of 27°C-120°C. It has frequency output and exhibits linear transfer characteristics, high sensitivity, and high resolution. This temperature sensoris proposed for microprocessor thermal management applications.