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*diff line on the top layer
8 r ?6 V# H' M6 m6 M*diffline.sp : caluclate diff stripline[pcbdiff_top.rlgc]. v3 p! t' M! Q. M/ c5 Q0 |3 V: B2 s
*created by liliming
* b* T+ Y; E1 \/ p****************************************************** S. H% A; g2 R+ I; {; Y) G
* material FR-4 W= S=
9 f% |( b+ h7 h1 K9 W" J4 H* CRISS SECTUIB DUAGRAN AS FIKKIWUBG0 I5 @" ], ?& \
*//////////----dWidth--- dGap ---dWidth----//////////dThickness
; ?6 l- R8 s7 B9 j) o' N% `# N6 F$ V0 U*////////////////////////////////////////////////////dHeight1& M1 f: P2 Y' u9 ^ p1 Z
*----------------------------------------------------dThickness# k3 g9 E7 t8 h+ ~; j' E% [
******************************************************
( k/ s ~/ u. X* u/ Z.param dHeight1=8mil
; ~" `$ _" `8 a# o* X4 y.param dWidth =5mil% a- L/ t+ e; n$ c; e% k
.param dGap =9mil& ~0 N$ E, R( Y4 A4 i
.param dThickness=1.2mil
. _+ A* M+ f) u.param dLength=10000mil% k- ~- H3 J# G5 m
.options probe post
0 l1 [" d0 c, @8 B7 Vvimpulse in1 gnd pulse (1.8v 0v 0ps 50ps 50ps 450ps 1ns)* V+ D7 Q; L" i/ a, j
wline in1 in2 gnd out1 out2 gnd fsmodel=dstrip n=2 l=dLength
5 V4 D: Z; Z* q* g; K1 n' p.material die dielectric er=4.3 losstangent=0.017
; M2 A* _7 w6 a( g.material copper metal conductivity=57.6meg
1 }3 s1 C' x/ P9 P.shape trace rectangle width=dWidth height=dThickness
" d2 j; L+ v& _9 |.layerstack stack
$ [: r' M m, P+layer=(copper,dThickness) layer=(die,dHeight1); E7 Q4 J5 F' c- c+ u: Z4 E
.fsoptions opt1 printdata=yes computeg0=yes computegd=yes computer0=yes computers=yes
8 Q! Z9 }- S' F1 O+ l" x2 Q.model dstrip w modeltype=fieldsolver2 ^. p7 Z" J$ V2 \' v% ?. {
+layerstack=stack
3 v) G2 _- G. c% X. i+fsoptions=opt1% E7 |! x! s; O8 I7 o! _
+rlgcfile=pcbdiff_top.rlgc
7 ?& d- w0 X8 a5 ^% v( k% @! m2 K+outputformat=rlgcfile
; U' H3 d! ]2 b! g9 o+ J+conductor=(shape=trace origin=(0mil,'dHeight1+dThickness') material=copper type=signal)
1 y; x: ^& g- Y/ n9 C+conductor=(shape=trace origin=('dWidth+dGap','dThickness+dHeight1') material=copper type=signal)
! t) C! E2 q2 w* ^: w.tran 1ns 10ns+ K/ v: ~* v8 v
.probe v(out1) v(in1)
! R& z9 }7 {. n$ U& i" X/ Q9 O.end |
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发表于 2010-5-15 11:09
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RLGC模型先上有人顶再上s参数
