The included versions of Qucs-S (0.0.19S) and Xyce 6.7 have been built for use on amd64 architectures. This post covers installation and use on macOS. Prerequisitesīinaries of a new release candidate rc5 of the Knowm OSS EDA Stack are available for macOS 10.12 Sierra and Ubuntu 16.04 LTS (Xenial Xerus). In this post I will be comparing the results of simulations of the M-MSS memristor model in JSpice with those previously obtained with Xyce and will provide additional information on JSpice usage and future development. These additional memristor models provide a SPICE compatible model and a stochastic behavioral model that capture the memory-enabling hysteresis behavior which is responsible for the memristive effect or “pinched” I-V response of the memristor. The M-MSS memristor model was recently added to JSpice along with Knowm’s original generalized MSS Metastable Switch Memristor model as described in the white paper Knowm Memristors, MSS Model and BEOL Service. Now the latest release candidate of the Knowm Open Source EDA Stack includes extensions to Qucs-S to support Xyce and JSpice allowing simulations using Knowm’s latest Xyce compatible M-MSS Mean Meta-stable Switch Memristor model as described in The Mean Metastable Switch Memristor Model in Xyce. The Qucs-S user interface can be used with several popular SPICE compatible simulators including Ngspice, SpiceOpus and Xyce. Since 2014 a branch of the Qucs project called Spice4qucs also known as Qucs-S has provided the user with a simple schematic layout tool, algebraic equation manipulation, EDD (Equation-Defined Device) modeling, Verilog-A model synthesis and a range of other behavioral device modeling and post simulation analysis tools. Both applications are available now for download under the GNU General Public License (GPLv3). Today I’ll be discussing a collaborative effort to extend the Knowm OSS EDA suite by adding support for Knowm’s own JSpice SPICE-inspired simulator in Qucs – Quite Universal Circuit Simulator an open source circuit simulator which has been steadily growing in popularity. My QUCS schematic source files here: qucs-schematic.In a previous post titled Simulating the Knowm M-MSS Memristor Model Using Qucs-S with Xyce, I presented the transient simulation of the basic AC sinusoidal response of the Knowm M-MSS (Mean Metastable-Switch Memristor) model implemented in Sandia National Laboratories’ Xyce Parallel Electronic Simulator. So what is wrong here? Should i add 50Ohm at the end or maybe decoupling capacitors. I want to build a simple circuit with S-parameters box as a starting point for further matching. Frequency sweep range the same as in datasheet (100Mhz to 26GHz) My idea was that if i see smith chart of a raw device, it must be something like datasheet:īut it is not. So here it is:Īnd build Smith-chart for it. Actually it is modified last example of line matching to 300 Ohm at **broken link removed** tutorial. So i decided stop searching for spice equivalent scheme of NE3210S01 and use simple S-parameters file NE3210S01v1_2-18_2_10.S2P.Īfter adding two-port S-parameters box to QUCS i found some unknown Vref voltage pin, and connected it to ground. But i read somewhere that S-parameter files can be successfully used for many simulations, representing device as a "black box" with known input and output. Fortunately i've found this tutorial: **broken link removed** (A Qucs Tutorial for RF Transmission Lines) Very good tutorial.Īlso i found information about using SPICE model of some transistor in QUCS: reports/14.Bah-Transistor_simulating_report.pdf. QUCS is very good program, although it is not so obvious how things can be done because need to add some equations. NE3210S01v1_2-18_2_10.S2P - ! Vds = 2 V Id = 10 mA <- (i think need use this file, looks like typical safe biased operation). NE3210S01v1_2-18_0_-2p5.S2P - Vds = 0 V Vgs = -2.5 V (device is turned off, but some negative DC bias on gate?) My first confusion is why there are three sets of S-parameters? I downloaded S-parameters files for NE3210S01 from this webpage:
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