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以下為我的計數器程式 用HSPICE模擬的 但是模擬出來後 發現5BIT的計數器的波形的上升及下降時間有點慢
$ ?% O0 k. v3 H3 ?: G% Z2 l# @因此影響到我後面電路的功能 所以想請問各位大大 能否增快計數器波形的上升及下降速度. W# [- O# N% `/ A6 {- _
**and20 {( _* P w$ |1 { L9 B" r
.subckt and2 4 5 35 K- P" B$ Y& ~/ p: o& s) s
m1 1 5 0 0 nch5 w=1.5u l=1u
! q1 X( e- z2 Ym2 2 4 1 0 nch5 w=1.5u l=1u
. A; R. L8 H2 ?8 ] hm3 3 2 0 0 nch5 w=1.5u l=1u
, z% c5 m" Z: f+ C& ^- fm4 2 4 vdd vdd pch5 w=3u l=1u
6 \, }5 S4 _+ |, V, B1 \/ `m5 2 5 vdd vdd pch5 w=3u l=1u2 k% K9 }# h Q' C6 A
m6 3 2 vdd vdd pch5 w=3u l=1u; Y2 Y1 p! ]+ q0 o: j# d8 n/ `9 w7 j
.ends
8 k. H6 Y/ J8 ?7 g; F, {$ i, g& ~1 P# S. d% k
**nand2
" m+ }9 `4 J0 f; w" V: P x- }+ B8 z.subckt nand2 4 5 2; b. Y+ e. y) ~( K
m1 1 5 0 0 nch5 w=1.5u l=1u0 |' `2 U8 L/ V4 Q! |
m2 2 4 1 0 nch5 w=1.5u l=1u( Z2 \; A& z9 n4 n
m4 2 4 vdd vdd pch5 w=3u l=1u
: ^' G. X4 H: K6 ^m5 2 5 vdd vdd pch5 w=3u l=1u, X" j/ [& y& b
.ends$ g/ j8 W1 m5 `- l: s8 ^
- ?5 A1 ~ |0 P- h N( R**nand3
4 j3 ?* L+ {, G2 c& H$ X( u- B.subckt nand3 5 6 7 3$ o% h, A. n+ L3 \% y4 z4 }
m1 1 7 0 0 nch5 w=1.5u l=1u' @) ]0 p( S/ S: x h
m2 2 6 1 0 nch5 w=1.5u l=1u M6 |: F+ K5 t( D) f! x
m3 3 5 2 0 nch5 w=1.5u l=1u
/ _" `+ `" o9 D8 _5 B M. km5 3 5 vdd vdd pch5 w=3u l=1u; v1 _7 Y l G: {: \3 `3 H- s
m6 3 6 vdd vdd pch5 w=3u l=1u
+ Q$ p; \: A+ r" F, zm7 3 7 vdd vdd pch5 w=3u l=1u ! [6 C! Q" {0 @! K
.ends. a, o7 t8 X0 c1 s4 U
5 M3 q, A) h5 _- b, y" I% i
.subckt td-ff d clk clr q q-' n* ?/ R3 u% n8 d
x1 b4 b2 b1 nand2
" m( i+ a; V5 B' i1 `4 Wx2 b1 clr clk b2 nand3+ v% v* Z$ P7 m3 ]
x3 b2 clk b4 b3 nand38 B2 E5 y4 M5 v5 J
x4 b3 clr d b4 nand3( X! A( U1 T) g* E. k
x5 b2 q- q nand2
5 T* |- f9 y, d# ?+ Ox6 q clr b3 q- nand3
8 q( e6 o% X. l- w. W4 D* l" Z.ends, R8 h6 |! p* e7 h$ @
( O: x% d6 i# |1 B7 d8 T
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**counter-1bit
z: F& T& ]+ x.subckt counter-1bit ck clr q
2 b9 @' t* t# `2 Fx7 d clk clr q q- td-ff
; H. W5 ^7 [' B$ |- x Sx8 q- t d and2
6 x4 W1 d( O3 P0 _- Ix9 ck clk not / x/ Z: X. ^. M- r. Y4 M
.ic v(d)=08 ~5 f$ w/ U5 Z8 x: B p
.ends( u# y$ o/ T$ z" E' R8 L0 s
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**counter-5bit7 P; z1 t0 s. A. }. f, g \) e" D
.subckt counter-5bit ck clr tqa tqb tqc tqd tqe
8 u8 H) n( h( T7 a" lx10 ck clr tqa counter-1bit6 [/ k! b, G( B1 {# U3 `
x11 tqa clr tqb counter-1bit
# w5 X9 k& \ i; J7 |( r: rx12 tqb clr tqc counter-1bit) @2 v' V( @# n5 r+ h! e
x13 tqc clr tqd counter-1bit
# _0 G8 }% r2 s4 b7 Q$ i }- W" z2 r! ]x14 tqd clr tqe counter-1bit% A& p. ~) [2 L8 _9 T4 ?2 [
.ends |
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