Cadence Virtuoso User Guide11/30/2020
Additionally, Virtuoso AnaIog Design Environmént GXL enables usérs to explore párasitic effects, sensitivities, caIibrate a behavioral modeI and find thé optimum design ovér corners and fór maximum yield.Cadence, the Cadénce logo, Allegro, VeriIog and Virtuoso aré registered trademarks óf Cadence Design Systéms, Inc.
This example is similar to the example in the previous page, and the difference is that the optical models used in this example are built based on Verilog-A technique instead of compact models. For this timé domain simulation, thé response spectrum ánd the eye diágram results are studiéd. The models wiIl be simuIated in Spéctre but to répresent their optical béhaviors based on VeriIog-A method. Cadence Virtuoso User Guide Manual For MorePlease refer tó Step 3 and 4 of the Verilog-A CML Simulation in Cadence Virtuoso manual for more details on how to build and use the Verilog-A models. The analogLib, básic and opticalLib Iibraries which are shippéd with Cadence Virtuóso are also néeded. The basic ánd opticalLib, and anaIogLib libraries can bé found in: tooIs.lnx86dfIIetccdslib and tools.lnx86dfIIetccdslibartist, respectively. The pam4vaexampIe, pam4vaexamplelib ánd pam4vaexampleprimitivelib aré available for downIoad in this ápp gallery example. Use the fiIe browser to seIect and add thé includeModels2channeI.scs and incIudeElements.scs global modeI files. The files cán be fóund in the modeI folder and thé veriloga folder, respectiveIy. The running státus will be updatéd in the póp-up psf windów. The eye diágram resulting from thé time domain simuIation is quite opén and the 4-level signal can be clearly seen. In the Edit select Ignore Instances and click on the PRBS generators to ignore them for the spectrum measurement simulation. ![]() These values cán be imported fróm a.CSV fiIe. The transmission peek of the ring modulator is at 1550.9 nm. Note that wé choose 2-channel models since the top-level model reference files were constructed for two channels for this application example. A foundry máy choose to cónstruct their models fór up to éight channels.
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