#403 transistor multiplier (m) effect does not appear in Xyce simulations Issue created by SultanShadow I have performed basic DC simulations on both LV/HV versions of NMOS and PMOS transistors available in the PDK using xschem and Ngspice+Xyce. The effect of transistor multipliers does not appear in the results when simulated through Xyce. Below is the lv_nmos simulation with m=1 using ngspice [Image](https://private-user-images.githubusercontent.com/50395489/426199317-ac5c3a91-9e8d-4882-b0a3-40218109d67f.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.sdeLkkyH3iBB1Cxnwc11PYPCqedukKW6-No8vH7lpMo) and same simulation with Xyce [Image](https://private-user-images.githubusercontent.com/50395489/426199500-6a8d43d1-e699-4fdb-989f-6d449d8b7101.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.ss7yYdoVTyhO1E4wfuaPq9RXV7HHHeR5QRGy_sHAcjY) In both cases the results are same if I change m=2 the the ngspice result is as expected (currents scale by about 2x) [Image](https://private-user-images.githubusercontent.com/50395489/426199831-c7997723-694f-4e07-8146-5b93bf6ac20b.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.8mu0E0eQB4RLeRcpwVFd8-zStMp87hnPzqv7rfviTIs) but for xyce, the results stay the same as they were for the case of m=1. [Image](https://private-user-images.githubusercontent.com/50395489/426200503-5011d2ca-fe5f-4eb7-bf6a-76d6903c9c8d.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.07EvX7OwfFtKqz-5K-bH82I6M9y0T-nlBn68BbCjB3k) Am I missing some configuration/setting option in case of Xyce ? IHP-GmbH/IHP-Open-PDK