This video covers the fundamentals of Low Noise Amplifiers (LNAs) and explains the need for cryogenic LNAs in advanced applications. It highlights the evolution of Cryo-LNAs from III-V technologies to CMOS, explores their architectures, and discusses the unique noise mechanisms that arise at cryogenic temperatures. Key design considerations, trade-offs, and the wide range of applications of Cryo-LNAs are also presented.