|
目前在研究LC VCO,從前人所提出用hspice 量測V-F曲線的方法得知利用
: Z% s2 n) V, {/ v, Z6 K.meas tran period trig V(out1) val=0.9 rise=50 targ V(out1) val=0.9 rise=100
% k, K1 J# v! a- a5 t.meas tran f param='50/period'
8 J: c4 V8 R1 ^3 N以及搭配.tran 0.1n 100n sweep in 0 1.8 0.1之語法: H3 ]$ ^) _8 W/ Q
/ U6 U) n: B; u# H' |3 w但我照上敘的方法,結果量測的每一點電壓的變化出來的頻率都一樣
' H& k/ z2 w/ Y0 [5 O5 A+ {' l不知是我那邊的語法沒有打好0 P6 T' f0 p; Q1 R. K( \: E0 S
我的可變電容輸入(in)是用pwl指令,從0v掃到1.8v 9 g0 C. _: y/ |7 K1 v& K" |/ ]" d
請各位前輩可給點意見...謝謝, C; j; r5 E$ H" \* k, |. H* `
以下是我的spice code; F4 N: Q/ }5 @
7 g- c8 M5 J+ k3 l7 ^) z.PARAM' R/ z8 H* Z7 d+ V5 B1 N! @
.GLOBAL gnd) v4 ~) f+ H6 w" @$ j2 m& f
+ vdd
/ g- o" a/ E' S: r.SUBCKT vco_nm in out1 out2 vbaise
$ Z! x @$ x( vMM0 out2 out1 vdd vdd pch W=5u L=180n M=80
. M% x& {2 t$ _1 |* c( g6 aMM1 out1 out2 vdd vdd pch W=5u L=180n M=80+ q7 ~# Q4 i% N' f! Y+ [+ \1 E
MM5 in out2 in vdd pch W=5u L=180.00n M=150
0 ~ x7 J+ ^( d: z# ?% ?2 yMM4 in out1 in vdd pch W=5u L=180.00n M=1006 {+ y0 m/ V# W' R+ H7 V
MM6 net32 vbaise gnd gnd nch W=5u L=180n M=60# V& |. J6 M9 }* W9 B
MM2 out2 out1 net32 net32 nch W=5u L=180n M=605 n3 Y5 Y& l3 ^- M+ W$ G
MM3 out1 out2 net32 net32 nch W=5u L=180n M=60: l1 F8 ], {( F$ J* F
LL0 out1 out2 0.8n $[LP]8 [0 L8 t" f# C( Y' t
.ENDS" P; o6 Q3 W# O" p, ]& [
: @0 R4 [' A( X8 S1 K
x1 in out1 out2 vbaise vco_nm
4 `5 y+ ]4 u2 g( H. Ov1 gnd 0 dc 0v) R0 |7 p/ y# b' e- `
v2 vdd 0 dc 1.8v2 g9 t$ t9 M& h- _2 o, s& X
v3 in 0 pwl 0n 0v 100n 1.8v
4 T, x1 @9 A/ K7 q5 k2 qv4 vbaise 0 dc 1.8v( t" V% \6 V6 Z8 X- X' W: {
, }( ?) `5 ^% h! bc1 out1 gnd 0.5p
% G& g) {4 {. u6 Q1 Gc2 out2 gnd 0.5p8 z2 j( v$ {2 M
.meas tran period trig V(out1) val=0.9 rise=50 targ V(out1) val=0.9 rise=100+ @' x( d* Y; n4 s, ^4 C/ R( ^0 O
.meas tran f param='50/period'
1 @# Q+ L$ ^+ p& h$ Y1 X7 B4 W: @& h/ }+ Y% D+ u# C7 x1 |+ T
.tran 0.1n 100n sweep in 0 1.8 0.1
) k2 [; q" b$ T8 h.option post
6 S6 ^. z# F2 E3 R: I9 b8 l.end |
|