oscillator

ted780428

我先前都是碰power方面的設計
最近開始玩玩看通訊方面的
  q7 M2 a  u9 f+ [6 E0 {$ \從最基本的oscillator開始...
4 l2 [" G+ b6 s8 T* \/ L/ H也是從類比下手
" k6 V- l1 ?3 F- j先弄個基本低頻RC震盪
9 b% f! H3 I, g2 D# z可是在Avanwaves都看不到震盪的波形..
是哪裡需要改進嗎? (我有爬過文..我問題好像很大 = =
2 o2 f0 B/ h/ q
軟體是用Hspice 2004
/ q8 Z+ u# @& N! X製程 mm0355v.l
6 g3 Q$ e: f  p5 H" E0 s8 N
$ J3 B1 U; g$ l% O8 o3 r; p4 R*****oscillator*****
) q2 `& g  E& j" r7 F) l.global vdd
.global gnd
*********Current-References*******
20uA
, g; X# ~5 A( L$ n4 w2 r***************OPA*********************
& s% h) Z4 n# Q2 q, Dmp1 1 vin- 2 vdd pch w=24u l=1u m=2
3 p, H6 Y8 e5 i4 |  I  ]mp2 11 gnd 2 vdd pch w=24u l=1u m=2
mp3 3 3 vdd vdd pch w=6u l=1u m=1
( ^4 n- G6 p  wmp4 2 3 vdd vdd pch w=6u l=1u m=1
/ S& X% I% E" Y4 x5 Imp5 5 6 vdd vdd pch w=6u l=1u m=1
mp6 7 6 vdd vdd pch w=6u l=1u m=1
mp7 6 x8 5 vdd pch w=6u l=1u m=1
mp8 12 x8 7 vdd pch w=6u l=1u m=1
6 z8 a5 J( M9 v7 z. v4 Tmp9 vout 12 vdd vdd pch w=24u l=1u m=30
mn5 6 x7 1 gnd nch w=12u l=1u m=1
- j9 _7 d1 T8 l' Cmn6 12 x7 11 gnd nch w=12u l=1u m=1
mn7 1 x2 gnd gnd nch w=4u l=1u m=1
3 X' s0 w- d- Omn8 11 x2 gnd gnd nch w=4u l=1u m=1
mn9 vout x2 gnd gnd nch w=24u l=1u m=10
*mn10 vb3 vb3 gnd gnd nch w=4u l=1u
mnc vout 12 vout vout nch w=10u l=0.35u m=100
cl vout gnd 10p
! D' w$ F- ]* P6 t0 {********外部電路*****
+ f4 n: z$ J# J# O: d5 [R1 vin- o1 1k
9 i& T/ S* O9 m* a  I- aRF vin- vout 30k
R2 o2 gnd 1k
( G+ X5 k, U% ?( o9 W+ \5 H+ rR3 o3 gnd 1k
. Q0 g- g. J6 t1 X5 l3 A/ sC1 o1 o2 0.065u
9 @9 o$ r3 A# n9 A9 t0 t+ n# OC2 o2 vout 0.065u
C3 o3 vout 0.065u
*********************
vdd vdd gnd 3.3v PWL(0 0, 1n 3.3V)  
; c1 s2 Y. ]: \: N*vin- vin- gnd dc 0 ac 0
*vin+ vin+ gnd dc 0 ac 1
*.dc vin+ 0v 3.3v 0.1
*.ac dec 10 100 10g
( @# g5 {5 ^7 d6 y8 [3 y*.IC V(o1) 0v
" q' n5 v7 @4 M; W.print i(mn9) v(vout)
. [& {! z5 o2 X' u6 B.tran 1u 2m
.op
6 |8 I. L2 A* m; u1 _" B.option post
5 q* C* p- i  H" @# T0 K.prot
3 ^. [8 G( }. z& Q9 i( a.lib 'mm0355v.l' tt
4 f/ A1 j4 Q% `5 V  f$ e; R! q.unprot
( ?  X0 e  G) D.end