Noise theory is continuing to gain momentum as a leading topic. Developments in the field are proving increasingly important to the electronics engineer or researcher specialising in communications and microwave engineering. This text provides a comprehensive overview of noise theory in linear and nonlinear circuits and serves as a practical guide for engineers designing circuits where noise is a significant factor. Features include: * A practical approach to the design of noise circuits * Graphical representations of noise quantities * Definition of all noise quantities for both active and passive circuits * Formulae for the conversion of different sets of noise parameters * Equations derived for