Ansoft announces Nexxim® v3 and Ansoft Designer® v3 for the Red Hat Enterprise Linux® v.3 and Sun Solaris® 8 and 9 operating systems. Nexxim is the company's circuit simulation software for high-performance IC design and signal-integrity analysis. Ansoft Designer provides an integrated schematic and design management front-end for complex analog, RF and mixed-signal applications. In addition to Linux support, Nexxim v3 adds phase and time-variant noise, autonomous source harmonic balance and seamless integration with Cadence ADE/Spectre® RF. Adding accurate phase and time-varying noise analyses to Nexxim is critical to the full characterization of communication ICs. The ability to include both driven and autonomous sources with a single harmonic-balance simulation expands the accuracy and detail with which complex transceiver circuits can be analyzed. Ansoft Designer v3 offers expanded Solver on Demand® capability and design-verification technology to speed the design process of RF systems and RF/analog ICs and to increase the accuracy of signal-integrity studies.