[BUG] Spice model to IBIS model......!!!

a7893657

最近小弟在研究IBIS，話說可以將spice model 轉成IBIS model，
可以應用於跨部門IP合作，或提供系統廠做系統整合應用，
. ^/ K8 T1 `% e' q% u7 C% b聽起來還蠻有趣的，於是小弟便由NC STATE University下載免費的轉IBIS的軟體
. i- F3 \: {. t3 T) |2 V) i0 phttp://www.ece.ncsu.edu/erl/software/s2ibis3.php
以及IBIS開放論壇相關資料
http://www.vhdl.org/pub/ibis/
. A( G( W7 J- @8 n! K又在google大帝的協助下，找到可以協助檢查IBIS語法的Tool
http://www.mentor.com/products/p ... visual_ibis_editor/

初步研究了兩三天，現在小弟用簡單的level shift去做測試，
跑出了下列的error，實在不解，請問各位大大可否幫小弟解題...

ERROR (line  243) - Invalid dV/dt_r Typical Value ("0.0/NA")
ERROR (line  243) - Invalid dV/dt_r Minimum Value ("0.0/NA")
ERROR (line  243) - dV must be greater than 0 in a Ramp specification
ERROR (line  243) - dT must be greater than 0 in a Ramp specification
& c4 @! H; o& M: eERROR (line  243) - Invalid dV/dt_r Maximum Value ("0.0/NA")
% m; K1 E3 S1 F, R" z* P+ X/ i" yERROR (line  243) - dV must be greater than 0 in a Ramp specification
% O5 D0 c6 s# N% d# p9 A' E2 s7 ]ERROR (line  243) - dT must be greater than 0 in a Ramp specification
ERROR (line  244) - dV must be greater than 0 in a Ramp specification
1 Y- @' B  G  F! M4 q9 V4 t( lERROR (line  244) - dT must be greater than 0 in a Ramp specification
' P6 d" D" K: U0 L# f6 jERROR (line  244) - Invalid dV/dt_f Minimum Value ("0.0/NA")
ERROR (line  244) - dV must be greater than 0 in a Ramp specification
ERROR (line  244) - dT must be greater than 0 in a Ramp specification
ERROR (line  244) - Invalid dV/dt_f Maximum Value ("0.0/NA")
, O: P3 Z" x6 y+ GERROR (line  244) - dV must be greater than 0 in a Ramp specification
7 J* b" Z( H: W( c, FERROR (line  244) - dT must be greater than 0 in a Ramp specification
ERROR - Model 'INV_A': Rgnd is set when Model_type is not Terminator
ERROR - Model 'INV_A': Rpower is set when Model_type is not Terminator
' s9 c% ?" ~0 O: mERROR - Model INV_A: The [Rising Waveform]
- \- Q$ M. Y+ b; c! [$ a      with [R_fixture]=20000 Ohms and [V_fixture]=1.2V
      has TYP column DC endpoints of  1.20V and  1.20v, but
" o! Z4 h% X" i9 L6 u      an equivalent load applied to the model's I-V tables yields
      different voltages ( 1.18V and  1.18V),
( t1 B9 C4 \0 _$ c9 R! N      a difference of  1.#J% and  1.#J%, respectively.
& R" Z7 S% I: B' U1 b8 ^ERROR - Model INV_A: The [Falling Waveform]
# X/ B( Q( e% w1 ?! Z6 I      with [R_fixture]=20000 Ohms and [V_fixture]=1.2V
- z' B# P( [9 c7 U+ s. F/ h0 R) H      has TYP column DC endpoints of  1.20V and  1.20v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages ( 1.18V and  1.18V),
3 O8 R2 M3 V3 C, n4 j5 L4 ^( J      a difference of  1.#J% and  1.#J%, respectively.
! C- Y- [  y0 V% OERROR - Model INV_A: The [Rising Waveform]
& X4 W7 _$ w/ S! j      with [R_fixture]=20000 Ohms and [V_fixture_min]=1.2V
      has MIN column DC endpoints of  1.20V and  1.20v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages ( 1.18V and  1.18V),

sd5517805

謝謝大大的分享,,,,,,,,,,,,,,,,.............

a7893657

看來好像大家都沒有follow到，後來小弟自己上網估了一下，

) \# X: |- U/ q& X1 U; {+ b, M! A原來是我spice to IBIS，R_fixture對應到pullup的load line數值偏差太大，
照IBIS有一定的偏差值，超過偏差值就會WARNING，過大就會ERROR，
3 x$ k( Z7 n4 ^1 M  y% }/ G
只要將適量的調整R_fixture，便可以...