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我先前都是碰power方面的設計
& i3 R9 S, X/ r1 h0 F+ E- o O最近開始玩玩看通訊方面的
) B0 q5 u! z+ Q( J3 y0 T: r- M從最基本的oscillator開始...
8 ^. t0 z- l3 H, U/ R+ f: O, F9 O也是從類比下手: D% j$ C# \7 [! i- ^
先弄個基本低頻RC震盪
7 T$ _2 H) f( q4 i Y6 e9 z! F可是在Avanwaves都看不到震盪的波形..
" b" E J- L; X3 e' i5 V是哪裡需要改進嗎? (我有爬過文..我問題好像很大 = =
I" ~; s( X5 u8 p$ R0 ^
" \# r( Z) z" j7 S; v軟體是用Hspice 2004
7 j2 P' h( ?# @" B製程 mm0355v.l+ L8 a; M2 K7 S$ m
9 E& V3 H; {6 R9 f# B6 ^*****oscillator*****
! C( i+ l: _2 U$ O0 T/ r$ z* G.global vdd4 D, ~* |( ~8 \2 y) L6 A% J' C
.global gnd
& L3 y/ p. u6 C/ c" F) E*********Current-References*******/ P# X( D* c( f
20uA/ R- y2 e, U% R0 H) M
***************OPA*********************
6 ^1 ?$ E& e# w: r; Ump1 1 vin- 2 vdd pch w=24u l=1u m=2
7 s# D; l- K, q# Cmp2 11 gnd 2 vdd pch w=24u l=1u m=2
# c- l! ~5 E& j! V$ o8 Kmp3 3 3 vdd vdd pch w=6u l=1u m=17 ~" t4 i; k1 T& n0 u
mp4 2 3 vdd vdd pch w=6u l=1u m=1. ^: L. j0 x6 G
mp5 5 6 vdd vdd pch w=6u l=1u m=1
' ?# P1 w @) l" Z* X2 f9 amp6 7 6 vdd vdd pch w=6u l=1u m=12 {7 h( y0 T- w
mp7 6 x8 5 vdd pch w=6u l=1u m=1
& Q7 d& m/ ^0 T& V" J( d$ vmp8 12 x8 7 vdd pch w=6u l=1u m=1
: C5 u9 {6 u# b* Y5 v' }+ omp9 vout 12 vdd vdd pch w=24u l=1u m=30
9 o; t8 c/ ~! M1 x! Rmn5 6 x7 1 gnd nch w=12u l=1u m=1
& S, J* w" O, k4 G: f& fmn6 12 x7 11 gnd nch w=12u l=1u m=1
( Z- p3 D. n# m3 B2 u3 }; n6 Jmn7 1 x2 gnd gnd nch w=4u l=1u m=1
" k6 J+ U9 `7 s2 S+ l, g6 hmn8 11 x2 gnd gnd nch w=4u l=1u m=1
) \6 F& m6 w% }5 @) \/ [) }- o4 z9 r6 U5 nmn9 vout x2 gnd gnd nch w=24u l=1u m=10$ Q* B+ v5 {, H8 e
*mn10 vb3 vb3 gnd gnd nch w=4u l=1u# j2 i9 i) `: x$ }! b& b
mnc vout 12 vout vout nch w=10u l=0.35u m=1003 B% u* O, c7 g w' O- Q, L
cl vout gnd 10p
+ \& K9 l, } v$ R********外部電路*****( ?" U! U: M1 n9 ~. k
R1 vin- o1 1k8 l! k! C/ {! a4 V$ e) c" w' S# ~
RF vin- vout 30k
9 O4 W% Q: J9 t' XR2 o2 gnd 1k
* ]0 g# X% w$ ]& Z0 G. dR3 o3 gnd 1k. Q2 j7 D2 T# N3 ?/ ]$ y- w. h
C1 o1 o2 0.065u
2 [: ^5 J, A6 L4 I, r' I; P! EC2 o2 vout 0.065u
( F0 R, f! F6 @: XC3 o3 vout 0.065u
' y8 x/ J% d) w: ~" n( c# l*********************
1 a& h# u, a! S' s9 ~8 ]vdd vdd gnd 3.3v PWL(0 0, 1n 3.3V)
3 I. l- w3 [* ~! k8 o8 G*vin- vin- gnd dc 0 ac 0
4 E$ ^' I6 o% F*vin+ vin+ gnd dc 0 ac 1
- @' l- I9 F9 I! @" A" |*.dc vin+ 0v 3.3v 0.13 p* [$ s# Y- B4 m Z
*.ac dec 10 100 10g
4 ~! M. m# `, f5 N$ E/ X# P6 n*.IC V(o1) 0v
5 u% e' p2 t% B: n9 W" @& j.print i(mn9) v(vout)
' r7 F3 J; L) F.tran 1u 2m
& z' H$ z; f* F5 S$ }2 s. R, \. }.op
w8 i& L. X1 a$ l. t# k9 C.option post! @! b3 o# ^" T: f
.prot
% W w7 S& e! f3 L! D( j% B( _.lib 'mm0355v.l' tt B8 ~0 S4 w. i
.unprot; Q( z1 m" O/ j- Y
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