Hello, I am Paolo Nenzi, ngspice developer. SPICE 2G.6 (1983) is the last FORTRAN version. Not currently known, but check the following for clues. If you know the answer add it to the article in the appropriate paragraph. Can someone source the assertion about the original license, and change it if necessary ?ĭoes anyone know the revision level of the first C implementation of SPICE? Hi, the article states "The original SPICE program was released under a restrictive license, which makes it difficult for others to improve upon the original software." and yet I have read in print ( I think it was in the IEEE Spectrum ) that SPICE was originally "public domain" and I think they implied it was the first "open source" program. This article has been rated as Low-importance on the project's importance scale.
#Macspice gui software#
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If you would like to participate, you can choose to edit the article attached to this page, or visit the project page, where you can join the project and see a list of open tasks. This article is part of WikiProject Electronics, an attempt to provide a standard approach to writing articles about electronics on Wikipedia. This article is of interest to the following WikiProjects: This article has been rated as Start-Class by WikiProject Vital Articles. SPICE has been listed as a level-5 vital article in Technology. helper stuff to get v(100000000) as the time variable.avoid singular matrices ra 7 0 1T rb 8 0 1T rc 9 0 1T rd 10 0 1T re 11 0 1T rf 12 0 1T rf 17 0 1T.short circuit for periodic continuation along two dimensions r1 3 4 1f r2 9 10 1f r3 5 6 1f r4 11 12 1f.Xz1p 1 13 zseries Xz1n 7 16 zseries Xz5p 5 16 zseries Xz5n 11 15 zseries Xz4p 4 16 zseries Xz4n 10 14 zseries Xz2n 8 14 zseries Xz2p 2 15 zseries Xz6n 12 14 zseries Xz6p 6 13 zseries Xz3p 3 15 zseries Xz3n 9 13 zseries subckt acell 1 7 2 8 Xy1 13 17 yparallel Xy2 14 17 yparallel X圓 15 17 yparallel Xy4 16 17 yparallel but, hey, we're in numerical approaches -) Any idea what to do in this case? Well, theory says that the circuit simulation must be stable as only passive components are used.
Moving from the trivial first test case slowly to my real problem I encounter two problems: 1) singular matrix errors (that I hopefully correctly cured by inserting 1TOhm resistors to ground) 2) an instability that leads to an aborting TRAN simulation.
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