Hspice仿真环形振荡器电路，无法起振

来了了事 · 发表于 2024-3-29 21:18:30

WESHUO 发表于 2024-3-29 20:46
你把工作点结果发出来看看，网表也一起发出来吧。

* E:\LTspice folders\pre_RO1.asc
.include"e:/Hspicefolders/model/PTM/180nm_bulk.pm"
.options post=2 list
*M1 N1 Vi P001 Vdd PMOS l=1u w=4u
M2 N002 N002 Vdd Vdd PMOS l=0.5u w=4u
M4 N1 N1 0 0 NMOS l=0.5u w=2u
M6 N006 N1 0 0 NMOS l=0.5u w=2u
R1 Vdd N1 10k
M5 N002 N1 0 0 NMOS l=0.5u w=2u
M3 N003 N002 Vdd Vdd PMOS l=0.5u w=4u
XXTG1 N003 Vdd N004 Ctrl1n OUT tg
XXTG2 N004 Vdd N006 OUT Ctrl1n tg
XXSMIT N004 Vdd N005 schmitt_trigger
C1 N004 0 10pf
XXAND N005 EN Vdd OUT and1
XXINV OUT Vdd Ctrl1n inv2
V1 Vdd 0 3.3
*V2 Vi 0 pwl(10P 0 100P 1)
V3 EN 0 1

* block symbol definitions
.subckt tg IN Vdd OUT Ctrln Ctrl
M1 OUT Ctrln IN Vdd PMOS l=0.5u w=2u
M2 IN Ctrl OUT 0 NMOS l=0.5u w=2u
.ends tg

.subckt schmitt_trigger IN Vdd Output

M2 N1 IN N1 N1 PMOS l=0.5u w=3u
M5 N1 IN N4 N4 NMOS l=0.5u w=3u
M4 N4 IN 0 0 NMOS l=0.5u w=3u
M3 0 N1 N1 Vdd PMOS l=0.5u w=3u
M6 N4 N1 Vdd 0 NMOS l=0.5u w=3u
M1 N1 IN Vdd Vdd PMOS l=0.5u w=3u
M7 N1 N001 Vdd Vdd PMOS l=0.5u w=16u
M8 N1 N001 0 0 NMOS l=0.5u w=8u
M9 N001 N1 Vdd Vdd PMOS l=0.5u w=16u
M10 N001 N1 0 0 NMOS l=0.5u w=8u
M11 Output N001 Vdd Vdd PMOS l=0.5u w=16u
M12 Output N001 0 0 NMOS l=0.5u w=8u

.ends schmitt_trigger

.subckt and1 A B Vdd OUT
XX1 A B Vdd N001 nand1
XX2 N001 Vdd OUT inv2
.ends and1

.subckt inv2 IN Vdd OUT
MP1 OUT IN Vdd Vdd PMOS l=0.5u w=4u
MN0 OUT IN 0 0 NMOS l=0.5u w=2u
.ends inv2

.subckt nand1 A B Vdd Out
MN1 Out A N001 N001 NMOS l=0.5u w=2u
MN2 N001 B 0 0 NMOS l=0.5u w=2u
MP1 Out A Vdd Vdd PMOS l=0.5u w=4u
MP2 Out B Vdd Vdd PMOS l=0.5u w=4u
.ends nand1

.tran 1p 20u

.end