作者pinns (努力向上中...)
看板Electronics
標題Re: [請益] HSPICE問題..
時間Fri Mar 23 02:28:19 2007
再請問一下..
哪邊有能找到有關於類比ic設計的相關資訊或論壇呢??
能否介紹一下??
※ 引述《pinns (努力向上中...)》之銘言：
: 小弟有兩個問題想請教各位高手...
: 1.以下是小地跑SPICE的時候 所出現的錯誤訊息..
: 能否請高手指教一下,到底是什麼問題呢?
: 是不是收斂的問題...因為剛開始跑沒多久 跑到一半 會當掉..
: lis檔如下..
: _____________________________________
: **error**: internal timestep too small in transient analysis
: time = 0.00000D+00; delta = 3.72529E-19; numnit = 112
: **warning** no convergence, invoking autoconvergence
: ***** job aborted
: **warning** autoconvergence is invoked! trying method=gear from time=0
: ***autoconvergence sets default value of the options:
: method= gear lvltim= 2
: mbypass= 1.00 bypass= 0.
: bytol= 50.00u slopetol= 500.00m
: rmax= 2.00
: **diagnostic** dc convergence failure,
: resetting dcon option to 1 and retrying
: **diagnostic** dc convergence failure,
: resetting dcon option to 2 and retrying.
: no convergence with standard algorithm, trying damped pseudo-transient
: **diagnostic** number of iteration exceeds min(7000, 20*itl1)= 4000 in pseudo
: tran process (converge=1 process). Usually this happens when the
: models are discontinous, or there are uninitialized bi-stable cells
: (flip-flop) in the circuit. By setting options dcon=-1 and converge=-1
: you can disable auto convergence process. Retry the run, non-convergence
: diagnostics will provide useful information about the nodes and devices
: which can be used to work around the non-convergence problems.
: no convergence in damped pseudo-transient, trying gmath ramping method
: **diagnostic** op convergence successful with gmath ramping method
: **warning** This was a difficult operating point.
: You can speed up your simulation by specifying:
: .OPTION CONVERGE=4
: Opening plot unit= 79
: file=c:\flexlm\comp(dc).tr1
: _________________________________________
: 問題2.
: 小弟在跑比較器的電路 請問高手 怎麼跑出出 遲滯曲線呢??
: 要使用.dc 還是.tran跑呢??
: 怎麼跑呢 能否請高手指教 ...
: 拜託了 請指教...
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