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發表於 2009-8-27 16:23:04
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最後想請問一個寫netlist的小問題/ [/ {( n& _" l. I
在網路上看到一些例子,特別把mos寫成並聯好幾個
8 \ R4 b& e/ q, r3 Vmp1 1 in1 7 vdd pch l=0.35u w=30u* E& ]3 J& p% B6 q) w* a
mp1 1 in1 7 vdd pch l=0.35u w=10u m=3
/ q/ }4 |5 A9 H0 p& x$ H8 o, S這兩種寫法有什麼差別嗎?(模擬或layout上), b L, M! k3 h6 N
如果不用下面的寫法會有什麼缺點? \, S$ R0 |( ]+ Y; X" |$ }3 C
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- C9 o1 Z# s/ `: m4 M附上小弟寫的folded cascode(輸入為PMOS) netlist:
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4 S1 q/ {8 O3 `3 ?0 m7 k, Afolded
, S! M: S' X3 q5 z/ v' _ ^.global vdd vss5 T3 M9 k* s- c6 ]
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.option acout=0
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; y# f* b3 e M% Z, ~.option post=2! a7 x* d* K+ q" l* c. E7 c, z3 ]
.option probe8 G) D& m1 e5 L* e# n
4 ~3 z) ]+ {- Q2 b5 r6 @. Q( {" v
.protect( S+ Q, O4 n* C
.lib ./rf018.l tt- I/ J6 h+ i1 w. ]
.unprotect% u2 @1 @) Y, u) V
. t& B# s. g9 |% T- p* Rmp1 1 in1 7 vdd pch l=0.35u w=30u- k3 y; e1 C- N, Z! g% L2 \
mp2 2 in2 7 vdd pch l=0.35u w=30u
, Z! S; x. }# c2 R% f) S0 N" u& i- l4 Rmp3 5 5 vdd vdd pch l=0.35u w=15u7 K3 `9 w- @: l" R( S
mp4 6 5 vdd vdd pch l=0.35u w=15u
- ]. j+ \7 R8 L: J5 q8 b. rmp5 out2 out2 5 vdd pch l=0.35u w=20u2 ^6 H4 s& y- V) y- ?5 r
mp6 out1 out2 6 vdd pch l=0.35u w=20u7 w, g6 ?) \' M: l/ R2 E1 x- t
mp7 7 b1 vdd vdd pch l=0.35u w=50u" {) l- b4 a, D) C4 N% w( J6 ]) u
mn1 out2 b2 1 vss nch l=0.35u w=5u
8 s* f# s+ ]& l; x9 K; hmn2 out1 b2 2 vss nch l=0.35u w=5u/ H, s0 d* X R& @9 E
mn3 1 b3 vss vss nch l=0.35u w=25u8 l* R5 v" f% K5 O" ^$ ^
mn4 2 b3 vss vss nch l=0.35u w=25u
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*輸入端的描述, T) C- V9 T N% T- ]. q: q
vd 9 0 dc 0 ac 1
" [8 [2 H4 W- x2 Oevd1 in1 8 9 0 0.5; L& Y' Y5 U7 p7 _, R, j
evd2 in2 8 9 0 -0.5
, z& g) K5 A7 Y# B, r4 avcm 8 0 dc 0' C1 g0 W. A0 z6 }& h; s: g6 u% b
vdd vdd 0 dc 3.3v5 @# a# W6 I2 z! I% m$ R0 T
vss vss 0 dc -3.3v
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vb1 b1 0 2.4
f' t6 y8 T* J1 V, N; P, q7 Tvb2 b2 0 -1.2+ o' X6 [* ^; Z/ J4 }
vb3 b3 0 -2.4! M/ I4 @% F* q. w4 ?& i. \! t
. x* }, x" @/ v2 A.op( s4 e4 g! h% s; ?* Q6 T4 I
.ac dec 10 100 100g
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+ b0 q6 S! @9 }1 m1 b*讀取輸出端的描述3 Q" m- s, m5 N0 l& a0 G% u1 ? M) L. _+ f
.print ac v(out1) v(out2) v(out1,out2)8 J1 E7 I# S% z
.probe ac v(out1) v(out2) v(out1,out2)
5 m9 P8 p5 l6 n7 D* q.print ac vdb(out1) vdb(out2) vdb(out1,out2)* u7 n3 @9 d0 e1 }% m
.probe ac vdb(out1) vdb(out2) vdb(out1,out2)$ ?( r% J' }/ G( @3 J
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.end |
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