Electrical Metrology: Thermal Noise in Resistors

This lecture covers the concept of thermal noise in resistors, explaining how to find the equivalent noise voltage of resistors, both individually and in parallel. It also delves into the KTC noise formula, illustrating the law of equipartition of energy and demonstrating how resistor thermal noise affects capacitors. Additionally, it explores the noise factor of cascading two-port networks, providing exercises to calculate the global noise factor and generalize the noise factor formula. The lecture concludes by discussing the optimal order of amplification blocks to minimize the total noise factor, using examples from radiation detection at CERN.