'''[[RF.Spice A/D]]''' is the outcome of evolution of EMAG Technologies' older EDA tool called '''[[B2.Spice A/D]]''', which was originally developed by Beige Bag Software Inc. Built upon the solid and age-tested foundation of [[B2.Spice A/D]] and having maintained its ease of use and versatility, [[RF.Spice A/D]] continues to offer all the schematic, simulation and data visualization tools and utilities of the older product including its parts database and analog, digital and mixed-mode analysis capabilities plus a wide range of transmission line models, multiport RF devices, a greatly expanded network analysis capability and a large library of system-level "black-box" virtual blocks for waveform generation, signal processing, spectral operations and various modulation schemes.
== The Stages of a Circuit / System Simulation ==
Every circuit simulation, regardless of analog, digital, RF, mixed-signal or system-level type, involves a number of common and recurring steps: