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小弟使用簡單設計了一個,由四個INV組成的butter,將其由SPICE model to IBIS model,
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參考NCSU的範例,在butter.s2i中有一段[PIN]設定,讓小弟很無解...
% p& T9 a( X4 l; J===============================butter.s2i: ?: b" W: G6 W+ r' e+ }' m
[Pin]/ C& _2 M D& v/ T4 t/ P4 H
1 out out INV_OUT
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2 in in dummy% ~4 l( W" X# K3 j
3 vsa12 vsa12 GND+ O3 O6 n h/ J' h' D* T
4 vda12 vda12 POWER& q+ O" E& W9 _& I: f: z( j& r
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[Model] INV_OUT' s" M- \4 b& _% J% c
[Model type] output6 T2 x% L/ W1 x3 k% q% \: G
[Polarity] Non-inverting
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9 }/ }7 C. Y! q0 [+ j0 Y& w[Model] dummy
$ c7 T7 T) J. W[nomodel]5 n+ w2 v" h. R, j5 ?) x7 l
===============================butter.s2i1 E+ ^1 Y& e7 e( b6 k$ x8 D
: R& G, x* W2 f; \$ V照他的解釋,她是利用了[Model]dummy去製造了一個假的輸入訊號,讓我可以模擬出V-t and V-I,實際也成功了,
( l# o+ c2 W9 d8 Y$ h: B8 f但我轉出的butter.ibs中出現了,+ ^5 L: f! r p" n
===============================butter.ibs
- ~8 S" g( `8 y4 F0 U[Pin] signal_name model_name R_pin L_pin C_pin
- o; x* Y4 O) b0 B) c9 m4 vda12 POWER 1 `0 l3 ?. j \/ G
3 vsa12 GND
]" L1 ~! X, d$ w3 n: k; h|2 in dummy
6 ^) R" x2 n# n) K1 out INV_OUT * m: x7 Z; a! |4 [; f: z; o5 C
===============================butter.ibs
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1 n+ ~6 ~! l. X* p這段轉出的IBSI model,確實把dummy給擋住了,這使得我的[Model type]output變成是一個只有輸出沒有輸入的"三腳"模型,
1 _/ q0 Z3 V) C( ^% y6 _$ E在我怎麼在hspice裡加入input都無法模擬,就算我"手動"把butter.ibs的"|"去掉改成model_name dummy=>INV_OUT,也是無用,
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5 [ |+ C! w6 j+ Q5 e) Q2 _請問各位大大,這是為什麼!???????? |
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