The book "Device and Circuit Cryogenic Operation for Low Temperature Electronics" offers a comprehensive analysis of the performance and physical mechanisms of advanced devices and circuits at cryogenic temperatures. It is aimed at professionals and students engaged in the application of electronics in extreme temperature ranges. The initial chapters focus on bulk silicon and SOI-MOSFETs, addressing aspects such as electronic transport in the inversion layer and device reliability. Subsequent chapters are dedicated to silicon-germanium transistors and III-V heterojunction bipolar transistors, along with their unique cryogenic properties. The book also explores quantum mechanical effects in silicon materials and provides an overview of the performance of cryogenic circuits and their applications. With a clear focus on the physical fundamentals and practical applications, this work is a valuable resource for anyone involved in the development and operation of electronics at low temperatures.