This new volume, Electronic Devices and Circuit Design: Challenges and Applications in the Internet of Things, offers a broad view of the challeges of electronic devices and circuits for IoT applications in a concise way.. The book presents the basic concepts and fundamentals behind new low power, high-speed efficient devices, circuits, and systems with new technology in addition to CMOS. It aims to help develop an understanding of new materials to improve device performance with smaller dimensions and lower costs. It looks at the new methodologies to enhance system performance and provides key parameters to explore the devices and circuit performance based on smart applications. The volume bridges the gap for researchers working on different areas of smart devices, circuits, and systems with IoT applications. The fundamental principles of electronic device and circuit design are discussed in a clear and detailed manner along with explanatory diagrams. Various IoT-based smart applications in different fields along with challenges and issues along with prospects of IoT for future applications have also been discussed. The chapters delve into myriad aspects of circuit design, including MOSFET structures depending on their low power applications for IoT-enabled systems, advanced sensor design and fabrication using MEMS, indirect bootstrap techniques, efficient CMOS comparators, various encryption-decryption algorithms, IoT video forensics applications, microstrip patch antennas in embedded IoT applications, real-time object detection using sound, IOT and nanotechnologies based wireless sensors, and much more. It also introduces logic BIST using BS-CFSR for electronic devices that can be part of many applications in many industries, such as defense, automotive, banking, computer, healthcare, networking, and telecommunication. This book provides a treasure house of up-to-date information on many aspects of electronic devices and circuit design, making it highly beneficial for researchers, scientists, faculty, students, and industry professionals.