The previous paragraphs give a brief statement of the dierent component modelling routes that were available up to release 0.0.11. As far as I know those are enhancements or extensions of the original QUCS, not separate programs that happen to share the name. namely that not all the Qucs built-in component models have equivalent SPICE models and secondly text netlists are the only entry medium for describing models. Are you perhaps thinking about a different program also named QUCS or something similar? I am not aware of another program named QUCS, although there are at least a few variants of QUCS out there. QUCS was always free to download and free to use. This modelling route is a very important and powerful model development tool. Contribute to Qucs/qucs development by creating an account on GitHub. Qorvo was formed a dozen years after QUCS was introduced. Both the SPICE to Qucs and OP AMP tutorials 7 outline in detail the steps required to merge circuit design and simulation in this way. Contribute to Qucs/qucs development by creating an account on GitHub. (Not to be confused with at least one previous project also named "Qspice", which is unrelated.) QSPICE, the new one from Mike Engelhardt, is affiliated with the company Qorvo, which itself came into existence in 2015, but with roots going back further. Actually, it is newer than new, since it does not exist yet. QUCS started 20 years ago (2003), based on software that had been in development for many years before that. Qucs, briefly for Quite Universal Circuit Simulator, is a circuit simulator with graphical user interface (GUI). Ignore the fact that they both begin with the letter "Q". I suggest to follow a tutorial before starting on circuit designs of. Nearly every simulator will break if there isnt at least one grounded node. The following simulation kernels are supported: See the for more details. Qucs-S contains instruments for schematic capture, visualization and provides differents passive and active components including device library. For example, you need to have a ground somewhere in your circuit. Qucs-S provides a fancy graphical user interface for a number of popular circuit simulation engines. Cornel_bejan15, Do not confuse QSPICE with QUCS. The Qucs-S implementation of Fourier simulation allows users to perform a Fourier analysis of one or more time domain circuit signals and to investigate their spectrum in the frequency domain. If you have set something up in LTSpice and cannot get a result, then likely that same circuit would fail in any simulator you try.
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