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我想請問 1 d# U1 q: _' I- O; W6 r2 W4 H
我最近把以前模擬過的一顆op; ], h0 M( N- Z) `
想由.35換成.18的製程( |: ^$ K$ L; x7 b
可是有幾顆電晶體都一直無法調整至saturation region 他都工作在triode region
* i6 \9 w) b' [6 b' d8 J想請問spice模擬的電晶體 工作在saturation region 的條件為何
5 y9 E$ c+ _& z. l t有什麼技巧可以讓電晶體工作在saturation region ?$ ]0 ] U+ K' J: M; e' O4 Y1 Z. c
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5 ?% ^' z) y1 l' h1 Ifolded-cascade opamp) v" Q% I0 _0 N! i. |0 g/ q7 C
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.lib 'mm018.l' TT# \* o4 F/ Q$ f% W
.unprot
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3 e9 K) J8 D jVDD vdd 0 DC 3.3v
4 H9 D' Q; p( n% x. ~0 rVIN+ vin+ 0 DC 1v AC 1V: \) Q+ }& d) {' b
VIN- vin- 0 DC 1v
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( u F- D3 u: k0 [; Z( ^ fVBIASP vbiasp 1 DC 0v+ }! C$ R6 t) D C$ F) I3 G
VBIASN vbiasn 0 DC 1v: Q7 ^% R9 D5 i1 g4 M \ A
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m1 7 vin- 1 vdd pch w=15u l=1u m=15 j5 O$ j$ G4 D- V( R( L8 e
m2 6 vin+ 1 vdd pch w=15u l=1u m=1; d9 O3 X9 ~- \: O" t3 s6 k
M9 7 vbiasn 0 0 nch W=5u L=1u m=19 G, n2 J; ~# X6 I$ f
M10 6 vbiasn 0 0 nch W=5u L=1u m=1" O: r& T! i I G& v" S
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M11 1 vbiasp vdd vdd pch W=10u L=1u m=30, `( \+ U, B2 U* t! Y# z& l$ }
.op
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. y) J7 V% R/ `7 G8 d0 _8 c//1 ****** HSPICE -- U-2003.09-SP1 (20031115) 20:34:49 12/30/2007 pcnt
& Y+ p) C4 ?+ L$ t3 H8 P' u: T ******
9 r- f9 m: |: g j folded-cascade opamp 9 u2 ^- v, A/ W# E6 O- R
****** operating point information tnom= 25.000 temp= 25.000
' S4 D. F/ K& S: H: I/ B7 T. { ****** ( [6 b! c! m7 D" u* [8 K/ _4 i/ Z
***** operating point status is all simulation time is 0.
% O1 t' `1 Q, R- ]& p" J: W node =voltage node =voltage node =voltage
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+0:1 = 2.6291 0:6 = 2.1972 0:7 = 2.1972
* x7 g" i$ L1 N' H% i E +0:vbiasn = 1.0000 0:vbiasp = 2.6291 0:vdd = 3.3000 % U- K" Q- N& S5 M
+0:vin+ = 1.0000 0:vin- = 1.0000
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**** voltage sources
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subckt
3 O* P+ f3 p8 ^" F, d element 0:vdd 0:vin+ 0:vin- 0:vbiasp 0:vbiasn . W, l' F: H+ _9 U& @) f/ Q
volts 3.3000 1.0000 1.0000 0. 1.0000 $ M. G; p1 z0 v7 {1 ?# X
current -481.6364u 0. 0. 0. 0.
% b& O, u6 i; h* z/ g! N! H" a power 1.5894m 0. 0. 0. 0.
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5 R. i- r' m4 Q total voltage source power dissipation= 1.5894m watts
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**** mosfets
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# l6 V' x" V% z0 q$ u subckt
; H7 v' J5 p8 j# o element 0:m1 0:m2 0:m9 0:m10 0:m11 . S: i, n! x. o3 v0 s" w
model 0:pch.2 0:pch.2 0:nch.5 0:nch.5 0:pch.5 7 ]6 R+ }% j3 [8 J- P5 F4 j
region Linear Linear Saturati Saturati Saturati
! [4 P2 \0 p- H id -240.8182u -240.8182u 240.7856u 240.7856u -481.6363u1 ~6 M5 U( m, Z* b5 N# d/ U8 ^- S& \
ibs 27.7495f 27.7495f -4.826e-19 -4.826e-19 50.5859a
( _: l% x1 ~* D3 b8 L% `: D) h! I) b, X ibd 27.7495f 27.7495f -32.5594n -32.5594n 562.1908f
( x% R0 ], _. T vgs -1.6291 -1.6291 1.0000 1.0000 -670.8606m, h' W) t/ n N' ?3 r- g. A! J
vds -431.9608m -431.9608m 2.1972 2.1972 -670.8606m* D5 K$ k5 v0 S* ?5 L( y. r
vbs 670.8606m 670.8606m 0. 0. 0.
! x1 |0 y8 j" a! n' g vth -648.2058m -648.2058m 483.1962m 483.1962m -458.6354m( U/ v' L; c% c% C
vdsat -809.0935m -809.0935m 476.0168m 476.0168m -204.2288m! x! ?. e% l+ \+ |7 c( z" }
beta 798.1469u 798.1469u 1.8916m 1.8916m 21.3671m
& }' Y. z9 n. y8 f gam eff 471.4654m 471.4654m 517.3875m 517.3875m 497.9476m8 h R; @3 r. x- \$ S% w
gm 267.1075u 267.1075u 765.1671u 765.1671u 3.8578m2 M6 }" a' D; n. O
gds 363.5742u 363.5742u 3.1814u 3.1814u 22.5359u8 x9 @6 ? U$ y$ M7 f! _
gmb 99.4698u 99.4698u 228.8685u 228.8685u 1.2749m
, u* z. J' A0 W6 @" e* D" o cdtot 96.5215f 96.5215f 4.7983f 4.7983f 371.1814f
8 ?/ L3 V( `5 t cgtot 129.8446f 129.8446f 33.1464f 33.1464f 1.9566p
, z6 t; |( C3 s7 R/ b( p0 x cstot 123.3593f 123.3593f 41.7131f 41.7131f 2.5406p6 ?7 v |* W' C
cbtot 52.6108f 52.6108f 18.6504f 18.6504f 1.3034p
$ \5 @. i" g& N v# ?$ Q/ x+ b cgs 77.8780f 77.8780f 28.1644f 28.1644f 1.6472p4 |4 L# K" G. ~3 O
cgd 50.9572f 50.9572f 1.8252f 1.8252f 98.1048f. g/ H2 v& ~7 W' u. ?, ?
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q/ k* ], Y% h0 [+ y; x[ 本帖最後由 stevenzhou 於 2007-12-30 09:07 PM 編輯 ] |
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