Low Power Wireless Receivers for IoT Applications with Multi-band Calibration Algorithms

2021

Author : Michael W. Rawlins
Release : 2021
Genre :
Kind : eBook
Book Rating : 309/5 ( reviews)

Book Synopsis Low Power Wireless Receivers for IoT Applications with Multi-band Calibration Algorithms by : Michael W. Rawlins

Download or read book Low Power Wireless Receivers for IoT Applications with Multi-band Calibration Algorithms written by Michael W. Rawlins. This book was released on 2021. Available in PDF, EPUB and Kindle. Book excerpt: This book guides the reader through the design of circuits and wireless IoT devices deployed in applications demanding low power, small size, and high levels of integration. The design of a sub-1V wireless-LAN receiver is detailed along with associated calibration algorithms. Some of the key circuits detailed include a successive approximation analog-to-digital converter, a rail-to-rail comparator, a digitally programmable CMOS low-noise amplifier, an RF voltage to current converter, and a fifth-order Chebyshev analog programmable filter. Helpful appendices are included teaching operational amplifier design, CMOS and SiGe low-noise amplifier design, impedance matching, noise and distortion analysis. While theory and design equations are presented throughout the book for the various circuit designs, practical implementation and design tradeoffs are emphasized so the reader can immediately apply knowledge gained. Receiver and calibration circuits are designed in a standard CMOS technology using a 900mV power supply. Provides readers with analytical tools and practical help, conveyed in a clear and concise manner, which will assist not only in understanding the material, but also in practical and functional implementation of the concepts demonstrated; Focuses on long range and broad-band IoT applications with a wireless-LAN focus, emphasizing detailed design techniques, helping readers transition from theoretical understanding to practical application; Bridges the gap between system level understanding and practical design implementation, providing readers with tools and techniques which can be applied immediately to their designs; Serves as a handy technical resource for practical design techniques, as well as a quick reference guide for design equations and examples pertinent to realistic applications.

Low Power Wireless Receivers for IoT Applications with Multi-band Calibration Algorithms

2021-04-02 Technology & Engineering

Author : Michael W. Rawlins
Release : 2021-04-02
Genre : Technology & Engineering
Kind : eBook
Book Rating : 296/5 ( reviews)

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Book Synopsis Low Power Wireless Receivers for IoT Applications with Multi-band Calibration Algorithms by : Michael W. Rawlins

Download or read book Low Power Wireless Receivers for IoT Applications with Multi-band Calibration Algorithms written by Michael W. Rawlins. This book was released on 2021-04-02. Available in PDF, EPUB and Kindle. Book excerpt: This book guides the reader through the design of circuits and wireless IoT devices deployed in applications demanding low power, small size, and high levels of integration. The design of a sub-1V wireless-LAN receiver is detailed along with associated calibration algorithms. Some of the key circuits detailed include a successive approximation analog-to-digital converter, a rail-to-rail comparator, a digitally programmable CMOS low-noise amplifier, an RF voltage to current converter, and a fifth-order Chebyshev analog programmable filter. Helpful appendices are included teaching operational amplifier design, CMOS and SiGe low-noise amplifier design, impedance matching, noise and distortion analysis. While theory and design equations are presented throughout the book for the various circuit designs, practical implementation and design tradeoffs are emphasized so the reader can immediately apply knowledge gained. Receiver and calibration circuits are designed in a standard CMOS technology using a 900mV power supply. Provides readers with analytical tools and practical help, conveyed in a clear and concise manner, which will assist not only in understanding the material, but also in practical and functional implementation of the concepts demonstrated; Focuses on long range and broad-band IoT applications with a wireless-LAN focus, emphasizing detailed design techniques, helping readers transition from theoretical understanding to practical application; Bridges the gap between system level understanding and practical design implementation, providing readers with tools and techniques which can be applied immediately to their designs; Serves as a handy technical resource for practical design techniques, as well as a quick reference guide for design equations and examples pertinent to realistic applications.

Ultra-Low Power Wireless Sensor Circuits for IOT Applications

2020

Author : Zhongxia Shang
Release : 2020
Genre :
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Ultra-Low Power Wireless Sensor Circuits for IOT Applications by : Zhongxia Shang

Download or read book Ultra-Low Power Wireless Sensor Circuits for IOT Applications written by Zhongxia Shang. This book was released on 2020. Available in PDF, EPUB and Kindle. Book excerpt: Wireless sensors, which are responsible for local data acquisition, processing and communication, play an important role in Internet of Things (IoT) applications. This research focuses on two basic components in wireless sensors, i.e., the low-power frequency tunable wireless receiver and the power management unit (PMU) for autonomous operation. In IoT applications, different sensors may need to operate in different frequency bands in order to meet environment constraints and industrial/medical standards. Thus, it is highly desirable to design a frequency configurable wireless receiver that provides flexibility in operation frequency. A 4-path filter based frequency shift keying (FSK) receiver is proposed to meet such a need, where the carrier frequency can be adjusted without changing the circuit. In addition, the proposed receiver requires no low-noise amplifier (LNA), which boosts the power efficiency. Frequency synthesizer is critical in FSK transceiver as it provides an accurate reference frequency. Based on 4-path mixer, a novel two-step calibration frequency synthesizer structure is proposed for low power consumption and wide locking range. Measurement results show that the proposed receiver achieves an energy per bit as 74pJ/bit with 2.5Mbps data rate and 184W power consumption. Post-layout simulation results show that the proposed frequency synthesizer has a figure of merit (FOM) value as 1.4W/MHz with 220MHz tuning bandwidth and 305W power consumption. Autonomous operation is another requirement for the sensors in many IoT applications, such as wearable sensors. Energy harvester is commonly used for autonomous sensors, where a PMU with low start-up voltage is necessary. To meet such a requirement, a novel controller for PMU is proposed to boost the power efficiency under very low load current. The proposed PMU can be started up with input voltage as low as several tens of millivolts. The novel controller costs little power and the overall efficiency is increased. Also, a hardware efficient maximum power point tracking (MPPT) algorithm which is suitable for energy source with fixed internal resistance is proposed. Measurement results show that the proposed system has a low controller power as 3.6W and the overall conversion efficiency is 83.9%.

Ultra-Low-Power and Ultra-Low-Cost Short-Range Wireless Receivers in Nanoscale CMOS

2015-07-25 Technology & Engineering

Author : Zhicheng Lin
Release : 2015-07-25
Genre : Technology & Engineering
Kind : eBook
Book Rating : 248/5 ( reviews)

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Book Synopsis Ultra-Low-Power and Ultra-Low-Cost Short-Range Wireless Receivers in Nanoscale CMOS by : Zhicheng Lin

Download or read book Ultra-Low-Power and Ultra-Low-Cost Short-Range Wireless Receivers in Nanoscale CMOS written by Zhicheng Lin. This book was released on 2015-07-25. Available in PDF, EPUB and Kindle. Book excerpt: This book provides readers with a state-of-the-art description of techniques to be used for ultra-low-power (ULP) and ultra-low-cost (ULC), short-range wireless receivers. Readers will learn what is required to deploy these receivers in short-range wireless sensor networks, which are proliferating widely to serve the internet of things (IoT) for “smart cities.” The authors address key challenges involved with the technology and the typical tradeoffs between ULP and ULC. Three design examples with advanced circuit techniques are described in order to address these trade-offs, which special focus on cost minimization. These three techniques enable respectively, cascading of radio frequency (RF) and baseband (BB) circuits under an ultra-low-voltage (ULV) supply, cascading of RF and BB circuits in current domain for current reuse and a novel function-reuse receiver architecture, suitable for ULV and multi-band ULP applications such as the sub-GHz ZigBee.

Ultra-Low-Power and High-Sensitivity Wake-Up Receivers for IoT Applications

2020

Author : Po-Han Wang
Release : 2020
Genre :
Kind : eBook
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Book Synopsis Ultra-Low-Power and High-Sensitivity Wake-Up Receivers for IoT Applications by : Po-Han Wang

Download or read book Ultra-Low-Power and High-Sensitivity Wake-Up Receivers for IoT Applications written by Po-Han Wang. This book was released on 2020. Available in PDF, EPUB and Kindle. Book excerpt: Wireless communication circuits often dominate the power consumption of Internet of Things (IoT) devices such as small battery-powered commercial wearables or low-power-wide-area-network (LPWAN) environmental sensors for infrastructure. More specifically, a large fraction of this power comes from node-to-hub or node-to-node networking requirements, especially when such devices communicate with low-to-medium average throughput. To reduce this power, instead of duty-cycling the main receiver, employing an auxiliary wake-up receiver (WuRX) that monitors the RF spectrum for a pre-defined wake-up signature either continuously or in duty-cycle fashion has been proved to be an effective solution. In this thesis, WuRX designs targeting ultra-low-power and high sensitivity for different usage scenarios are investigated. First, a WuRX for emerging LPWAN applications targeting to be used with the always-on WuRX communication protocol is presented. This design explores architecture-level and circuit-level techniques to operate with near-zero power consumption while achieving high sensitivity. Moreover, an active and a passive envelope detector (ED) that employ pseudo-balun architectures are also proposed, which further improve sensitivity and enable operation at a higher frequency band. On the other hand, WuRXs for commercial applications targeting to be used primarily with the duty-cycled WuRX communication protocol while being compatible with well-established wireless standards are also presented. First, a Bluetooth Low Energy (BLE) WuRX achieves low power, high sensitivity, interference-resiliency, and standard-compatibility through a combination of communication and circuit techniques, including high-Q filtering by a bank of FBAR resonators and a frequency-hopped mixer-first RF front-end that responds to a 4-dimensional (4-D) wake-up signature. This work is then further enhanced to achieve higher sensitivity while maintaining comparable interference-resiliency and power without the off-chip FBAR filters for a fully integrated solution. More importantly, this enhanced design is the first dual-mode WuRX compatible with both BLE and Wi-Fi transmitters, thanks to a carefully architected frequency plan that supports BLE advertisement channel hopping or a proposed subcarrier-based within-channel Wi-Fi frequency hopping scheme. As a result, the presented WuRX designs could potentially help enable new wireless IoT applications, particularly those that have low-to-medium average throughput requirements.

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