[問題] hspice jkff bcd counter

看板Electronics作者corydoras09 (一劍籙魂)時間9年前 (2017/01/20 15:58)推噓3(3推 0噓 5→)

留言8則, 5人參與討論串1/1

用spice寫出jkflipflop 再依據以下電路做出bcd counter http://i.imgur.com/wPog8j0.jpg

jk ff電路因為不用preset所以拔掉 http://i.imgur.com/z2fStpV.jpg

但是卻出現奇怪的波形 http://i.imgur.com/8fBxCSa.jpg

jkff子電路 .subckt jkff j k ck q clr Mp11 n1 qb vdd vdd P_18 W=0.36u L=0.18u Mp12 n1 j vdd vdd P_18 W=0.36u L=0.18u Mp13 n1 ck vdd vdd P_18 W=0.36u L=0.18u Mn11 n1 qb d11 0 N_18 W=0.54u L=0.18u Mn12 d11 j d12 0 N_18 W=0.54u L=0.18u Mn13 d12 ck 0 0 N_18 W=0.54u L=0.18u Mp21 n2 ck vdd vdd P_18 W=0.36u L=0.18u Mp22 n2 k vdd vdd P_18 W=0.36u L=0.18u Mp23 n2 q vdd vdd P_18 W=0.36u L=0.18u Mn21 n2 ck d21 0 N_18 W=0.54u L=0.18u Mn22 d21 k d22 0 N_18 W=0.54u L=0.18u Mn23 d22 q 0 0 N_18 W=0.54u L=0.18u Mp31 q n1 vdd vdd P_18 W=0.36u L=0.18u Mp32 q qb vdd vdd P_18 W=0.36u L=0.18u Mn31 q n1 d31 0 N_18 W=0.54u L=0.18u Mn32 d31 qb 0 0 N_18 W=0.54u L=0.18u Mp41 qb q vdd vdd P_18 W=0.36u L=0.18u Mp42 qb n2 vdd vdd P_18 W=0.36u L=0.18u Mp43 qb clr vdd vdd P_18 W=0.36u L=0.18u Mn41 qb q d41 0 N_18 W=0.54u L=0.18u Mn42 d41 n2 d42 0 N_18 W=0.54u L=0.18u Mn43 d42 clr 0 0 N_18 W=0.54u L=0.18u .ends .subckt nand a b op Mp31 op a vdd vdd P_18 W=0.36u L=0.18u Mp32 op b vdd vdd P_18 W=0.36u L=0.18u Mn31 op a d31 0 N_18 W=0.36u L=0.18u Mn32 d31 b 0 0 N_18 W=0.36u L=0.18u .ends ************************************* conter0120 .prot .lib 'cic018.l' tt .unprot .option post=2 .global vdd .include 'sub_jkff.sp' vdd vdd 0 dc 1.8 vclk clk 0 PULSE ( 0 1.8 5ns 1ps 1ps 10ns 20ns ) *vj j 0 PULSE ( 1.8 0 5ns 1ps 1ps 15ns 30ns ) *vk k 0 PULSE ( 1.8 0 5ns 1ps 1ps 30ns 60ns ) * j k clk q clr xjk1 vdd vdd clk q1 clr jkff xjk2 vdd vdd q1 q2 clr jkff xjk3 vdd vdd q2 q3 clr jkff xjk4 vdd vdd q3 q4 clr jkff xnand q2 q4 clr nand .tran 10n 500n .end ************************************* -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 140.129.50.180 ※ 文章網址: https://www.ptt.cc/bbs/Electronics/M.1484899130.A.DF2.html

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relax321

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r901042004

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r901042004

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