Query Regarding CMOS Four-Quadrant Multiplier

[hsuri]

Hii all,

I'm Designing a CMOS Four Quadrant Miltiplier using bias feedback techniques, the schematic for which is attached.
I'm using Tanner for simulation. Also, i'm following 0.5 microns technology.
The specifications for the transistors are as follow:

* SPICE netlist written by S-Edit Win32 7.00
* Written on Nov 19, 2011 at 13:40:21

* Waveform probing commands
.probe
.options probefilename="multiplier.dat"
+ probesdbfile="C:\Users\user\Downloads\project\multiplier.sdb"
+ probetopmodule="multiplier"

* Main circuit: multiplier
M1 N10 vy VB Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M2 VB N9 N3 Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M3 N7 N9 VB Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M4 VB vy N6 Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M5 N10 vx N4 Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M6 N2 vx N3 Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M7 N7 N5 N4 Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M8 N2 N5 N6 Gnd NMOS L=10u W=2.5u AD=66p PD=24u AS=66p PS=24u 
M9 N11 N12 N12 Gnd NMOS L=10u W=20u AD=66p PD=24u AS=66p PS=24u 
M10 vss N11 N11 Gnd NMOS L=10u W=20u AD=66p PD=24u AS=66p PS=24u 
M11 Vout N12 N8 Gnd NMOS L=10u W=20u AD=66p PD=24u AS=66p PS=24u 
M12 N8 N11 vss Gnd NMOS L=10u W=20u AD=66p PD=24u AS=66p PS=24u 
M13 Vdd N16 N16 Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
M14 N16 N2 N2 Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
M15 N13 N16 Vdd Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
M16 N12 N2 N13 Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
M17 Vdd N15 N15 Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
M18 N15 N4 N4 Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
M19 N14 N15 Vdd Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
M20 Vout N4 N14 Vdd PMOS L=10u W=50u AD=66p PD=24u AS=66p PS=24u
R21 Vout Gnd 10k TC=0.0, 0.0
v22 vx N5 pulse(0.0 5.0 0 10n 10n 100n 200n)
v23 vy N9 pulse(0.0 3.0 0 10n 10n 50n 100n)
* End of main circuit: multiplier

.include "C:\Users\user\Desktop\Tanner\License\0.5 Microns.md"
vdd vdd GND 2.5
vss vss GND -2.5
VB VB GND -5.5
.tran 1n 200n 

.print tran v(vx) v(vy) v(VB)

The problem is that the waveforms are not forming up.Plz Help.

View attachment Untitled.pdf