* SPICE netlist
M1 N004 notA 0 0 NMOS
M2 Xor_out A N004 N004 NMOS
M3 Xor_out notB N004 N004 NMOS
M4 N004 B 0 0 NMOS
M5 N003 notA N001 N001 PMOS
M6 N001 B Vdd Vdd PMOS
M7 N002 notB Vdd Vdd PMOS
M8 N003 A N002 N002 PMOS
M9 notA A Vdd Vdd PMOS
M10 notA A 0 0 NMOS
M11 notB B Vdd Vdd PMOS
M12 notB B 0 0 NMOS
V1 Vdd 0 5
V2 A 0 PULSE(0 5 1n 0.1n 0.1n 5n 10n)
V3 B 0 PULSE(0 5 11n 0.1n 0.1n 10n 20n)
V_cmos N003 Xor_out 0
.tran 70n

* LTspice schematic (.asc)
Version 4
SHEET 1 1952 880
WIRE 224 -440 48 -440
WIRE 400 -440 224 -440
WIRE 0 -424 -32 -424
WIRE 512 -424 448 -424
WIRE -832 -296 -896 -296
WIRE -816 -296 -832 -296
WIRE -896 -248 -896 -296
WIRE 48 -232 48 -344
WIRE 400 -232 400 -344
WIRE 752 -232 720 -232
WIRE 768 -232 752 -232
WIRE 0 -216 -96 -216
WIRE 496 -216 448 -216
WIRE -336 -200 -352 -200
WIRE -304 -200 -336 -200
WIRE 720 -168 720 -232
WIRE 864 -152 768 -152
WIRE -896 -136 -896 -168
WIRE -304 -136 -304 -200
WIRE 208 -136 48 -136
WIRE 400 -136 208 -136
WIRE -352 -120 -448 -120
WIRE 208 -88 208 -136
WIRE -912 -72 -960 -72
WIRE -896 -72 -912 -72
WIRE 720 -72 704 -72
WIRE -288 -40 -304 -40
WIRE -960 -24 -960 -72
WIRE 864 24 864 -152
WIRE 912 24 864 24
WIRE 976 24 912 24
WIRE -480 40 -496 40
WIRE -448 40 -448 -120
WIRE -448 40 -480 40
WIRE 208 40 208 -8
WIRE 304 40 208 40
WIRE 336 40 304 40
WIRE 512 40 512 -424
WIRE 624 40 512 40
WIRE 704 40 704 -72
WIRE 704 40 624 40
WIRE -288 72 -288 -40
WIRE -176 72 -288 72
WIRE -96 72 -96 -216
WIRE -96 72 -176 72
WIRE -960 104 -960 56
WIRE 208 104 208 40
WIRE 208 104 48 104
WIRE 400 104 208 104
WIRE 704 104 704 40
WIRE -288 136 -288 72
WIRE -928 184 -976 184
WIRE -896 184 -928 184
WIRE 0 184 -32 184
WIRE 512 184 512 40
WIRE 512 184 448 184
WIRE 864 184 864 24
WIRE 864 184 752 184
WIRE 208 200 48 200
WIRE 400 200 208 200
WIRE -976 216 -976 184
WIRE -448 216 -448 40
WIRE -336 216 -448 216
WIRE 704 248 704 200
WIRE -288 280 -288 232
WIRE 208 296 208 200
WIRE 208 296 48 296
WIRE 400 296 208 296
WIRE -976 328 -976 296
WIRE -96 376 -96 72
WIRE 0 376 -96 376
WIRE 512 376 448 376
WIRE 208 392 48 392
WIRE 400 392 208 392
WIRE 208 440 208 392
FLAG 208 440 0
FLAG -288 280 0
FLAG -336 -200 Vdd
FLAG 704 248 0
FLAG 752 -232 Vdd
FLAG -896 -136 0
FLAG -832 -296 Vdd
FLAG -960 104 0
FLAG -976 328 0
FLAG -912 -72 A
FLAG -928 184 B
FLAG 224 -440 Vdd
FLAG -32 184 A
FLAG -480 40 A
FLAG 496 -216 A
FLAG -176 72 notA
FLAG -32 -424 B
FLAG 512 376 B
FLAG 912 24 B
FLAG 624 40 notB
FLAG 304 40 Xor_out
SYMBOL nmos 0 296 R0
SYMATTR InstName M1
SYMBOL nmos 0 104 R0
SYMATTR InstName M2
SYMBOL nmos 448 104 M0
SYMATTR InstName M3
SYMBOL nmos 448 296 M0
SYMATTR InstName M4
SYMBOL pmos 0 -136 M180
SYMATTR InstName M5
SYMBOL pmos 0 -344 M180
SYMATTR InstName M6
SYMBOL pmos 448 -344 R180
SYMATTR InstName M7
SYMBOL pmos 448 -136 R180
SYMATTR InstName M8
SYMBOL pmos -352 -40 M180
SYMATTR InstName M9
SYMBOL nmos -336 136 R0
SYMATTR InstName M10
SYMBOL pmos 768 -72 R180
SYMATTR InstName M11
SYMBOL nmos 752 104 M0
SYMATTR InstName M12
SYMBOL voltage -896 -264 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -960 -40 R0
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 1n 0.1n 0.1n 5n 10n)
SYMBOL voltage -976 200 R0
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 11n 0.1n 0.1n 10n 20n)
SYMBOL voltage 208 -104 R0
SYMATTR InstName V_cmos
SYMATTR Value 0