[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，
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
' k7 P: A8 ]7 P# Ahttp://www.ece.ncsu.edu/erl/software/s2ibis3.php
以及IBIS開放論壇相關資料
  s0 d2 Q- t  V% S7 Ehttp://www.vhdl.org/pub/ibis/
又在google大帝的協助下，找到可以協助檢查IBIS語法的Tool
2 ~2 t: N9 O; N. m0 T8 }4 r6 Qhttp://www.mentor.com/products/p ... visual_ibis_editor/
$ B1 e  T- C7 I, z- V8 a$ C; k2 U
" j! A& t$ F) \" y初步研究了兩三天，現在小弟用簡單的level shift去做測試，
# f# E% @! `: M$ i7 P跑出了下列的error，實在不解，請問各位大大可否幫小弟解題...
3 G* X- K& y+ G4 M* L  ]- u
ERROR (line  243) - Invalid dV/dt_r Typical Value ("0.0/NA")
; O/ u" [+ q( }& O  Z- wERROR (line  243) - Invalid dV/dt_r Minimum Value ("0.0/NA")
" C1 V  D0 p% ~$ k7 w- KERROR (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
" G9 ~8 t4 b' c- O) L9 t5 d( TERROR (line  243) - Invalid dV/dt_r Maximum Value ("0.0/NA")
4 p9 f8 X+ A' Q% e$ rERROR (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
! b# v2 D3 J: c8 w. o* e" ?ERROR (line  244) - dV must be greater than 0 in a Ramp specification
, T& @- a0 h8 T  W# B, kERROR (line  244) - dT must be greater than 0 in a Ramp specification
; d# Y2 z' H- [) q' VERROR (line  244) - Invalid dV/dt_f Minimum Value ("0.0/NA")
ERROR (line  244) - dV must be greater than 0 in a Ramp specification
0 }2 T! P3 Q% N9 s* s6 LERROR (line  244) - dT must be greater than 0 in a Ramp specification
/ U7 K6 F$ b' w7 r2 O2 kERROR (line  244) - Invalid dV/dt_f Maximum Value ("0.0/NA")
$ L- b1 w$ O0 p) YERROR (line  244) - dV must be greater than 0 in a Ramp specification
; w% O% u8 a# W( Z4 UERROR (line  244) - dT must be greater than 0 in a Ramp specification
* K4 r$ n8 J2 w" w" HERROR - 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
ERROR - Model INV_A: The [Rising Waveform]
      with [R_fixture]=20000 Ohms and [V_fixture]=1.2V
      has TYP column DC endpoints of  1.20V and  1.20v, but
& y  G2 J# Z6 O3 s1 O/ N- j" T      an equivalent load applied to the model's I-V tables yields
      different voltages ( 1.18V and  1.18V),
9 A. u( w) F1 B- u. }* F5 I4 V      a difference of  1.#J% and  1.#J%, respectively.
ERROR - Model INV_A: The [Falling Waveform]
- Y7 T8 N7 u# u0 y  s! C      with [R_fixture]=20000 Ohms and [V_fixture]=1.2V
4 V. x: ]# [* N  z7 m5 h% n      has TYP column DC endpoints of  1.20V and  1.20v, but
+ }; M. d& ~3 p, `! j7 \      an equivalent load applied to the model's I-V tables yields
      different voltages ( 1.18V and  1.18V),
      a difference of  1.#J% and  1.#J%, respectively.
0 U! @7 `5 m- Q9 \& jERROR - Model INV_A: The [Rising Waveform]
3 }8 k2 B, R' b8 H$ Y0 c$ D  {9 {      with [R_fixture]=20000 Ohms and [V_fixture_min]=1.2V
2 z, p) d' t# w) ^1 y" Y3 }' W1 m      has MIN column DC endpoints of  1.20V and  1.20v, but
1 e0 ^7 Q# Q8 t9 F1 s8 B% Y      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，
3 p& T/ \" C; h" F+ P$ j
- T0 @% T) d. l) M原來是我spice to IBIS，R_fixture對應到pullup的load line數值偏差太大，
* U" n; i" _7 [6 Z+ [& ~3 m6 _照IBIS有一定的偏差值，超過偏差值就會WARNING，過大就會ERROR，
0 h( @  ^, H2 ~+ N2 t, l
只要將適量的調整R_fixture，便可以...