* SPICE netlist
Q11 N001 N001 Vcc 0 pnp741
R4 N001 N008 160k
Q10 N008 N008 Vee 0 npn741
Q9 N007 N008 N010 0 npn741
Q8 N007 N002 Vcc 0 pnp741
Q7 N002 N002 Vcc 0 pnp741
Q1 N002 in1 N003 0 npn741
Q2 N002 in2 N004 0 npn741
Q3 N009 N007 N003 0 pnp741
Q4 out N007 N004 0 pnp741
Q6 out N009 N012 0 npn741
Q5 N009 N009 N011 0 npn741
R3 N010 Vee 1.5k
R1 N011 Vee 1.5k
R2 N012 Vee 1.5k
Vcc Vcc 0 15
Vee 0 Vee 15
Vin1 in1 0 SINE(0 0.1m 1k)
Vin2 in2 0 SINE(0 0.1m 1k 0 0 90)
RL out 0 1000k
V1 N005 0 ac 0.1m 0
V2 N006 0 ac 0.1m 90
.tran 0 1 0.998 0.001m
;ac dec 1000000 1e-3 1e10

* LTspice schematic (.asc)
Version 4
SHEET 1 1584 784
WIRE -104 -392 -152 -392
WIRE 136 -392 -104 -392
WIRE 248 -392 136 -392
WIRE 472 -392 248 -392
WIRE 648 -392 472 -392
WIRE -104 -344 -104 -392
WIRE 136 -344 136 -392
WIRE 472 -344 472 -392
WIRE -24 -296 -40 -296
WIRE 360 -296 200 -296
WIRE 408 -296 360 -296
WIRE -728 -232 -728 -248
WIRE 360 -232 360 -296
WIRE 472 -232 472 -248
WIRE 472 -232 360 -232
WIRE -104 -216 -104 -248
WIRE -24 -216 -24 -296
WIRE -24 -216 -104 -216
WIRE 472 -200 472 -232
WIRE 472 -200 360 -200
WIRE 584 -200 472 -200
WIRE 296 -152 264 -152
WIRE 680 -152 648 -152
WIRE -728 -136 -728 -152
WIRE -728 -136 -792 -136
WIRE -792 -120 -792 -136
WIRE 264 -120 264 -152
WIRE 680 -120 680 -152
WIRE -728 -104 -728 -136
WIRE -104 -88 -104 -216
WIRE 360 -88 360 -104
WIRE 584 -88 584 -104
WIRE -488 -72 -488 -104
WIRE -344 -72 -344 -104
WIRE 456 -40 424 -40
WIRE 520 -40 456 -40
WIRE -728 -8 -728 -24
WIRE -488 24 -488 8
WIRE -344 24 -344 8
WIRE 136 72 136 -248
WIRE 456 72 456 -40
WIRE 456 72 136 72
WIRE 584 104 584 8
WIRE 728 104 584 104
WIRE 792 104 728 104
WIRE -104 120 -104 -8
WIRE 8 120 -104 120
WIRE 360 120 360 8
WIRE 456 120 360 120
WIRE 728 136 728 104
WIRE -104 152 -104 120
WIRE 136 152 136 72
WIRE 360 152 360 120
WIRE 584 152 584 104
WIRE -760 168 -760 136
WIRE -648 168 -648 136
WIRE 8 200 8 120
WIRE 8 200 -40 200
WIRE 72 200 8 200
WIRE 456 200 456 120
WIRE 456 200 424 200
WIRE 520 200 456 200
WIRE 728 248 728 216
WIRE -760 264 -760 248
WIRE -648 264 -648 248
WIRE 136 280 136 248
WIRE 360 280 360 248
WIRE 584 280 584 248
WIRE -104 392 -104 248
WIRE -104 392 -152 392
WIRE 136 392 136 360
WIRE 136 392 -104 392
WIRE 248 392 136 392
WIRE 360 392 360 360
WIRE 360 392 248 392
WIRE 584 392 584 360
WIRE 584 392 360 392
WIRE 648 392 584 392
FLAG -792 -120 0
FLAG -728 -248 Vcc
FLAG 248 -392 Vcc
FLAG -728 -8 Vee
FLAG 248 392 Vee
FLAG 792 104 out
FLAG -760 264 0
FLAG -648 264 0
FLAG 728 248 0
FLAG 264 -120 in1
FLAG 680 -120 in2
FLAG -488 24 0
FLAG -344 24 0
FLAG -760 136 in1
FLAG -648 136 in2
SYMBOL pnp -40 -248 R180
SYMATTR InstName Q11
SYMATTR Value pnp741
SYMBOL res -120 -104 R0
SYMATTR InstName R4
SYMATTR Value 160k
SYMBOL npn -40 152 M0
SYMATTR InstName Q10
SYMATTR Value npn741
SYMBOL npn 72 152 R0
SYMATTR InstName Q9
SYMATTR Value npn741
SYMBOL pnp 200 -248 R180
SYMATTR InstName Q8
SYMATTR Value pnp741
SYMBOL pnp 408 -248 M180
SYMATTR InstName Q7
SYMATTR Value pnp741
SYMBOL npn 296 -200 R0
SYMATTR InstName Q1
SYMATTR Value npn741
SYMBOL npn 648 -200 M0
SYMATTR InstName Q2
SYMATTR Value npn741
SYMBOL pnp 424 8 R180
SYMATTR InstName Q3
SYMATTR Value pnp741
SYMBOL pnp 520 8 M180
SYMATTR InstName Q4
SYMATTR Value pnp741
SYMBOL npn 520 152 R0
SYMATTR InstName Q6
SYMATTR Value npn741
SYMBOL npn 424 152 M0
SYMATTR InstName Q5
SYMATTR Value npn741
SYMBOL res 120 264 R0
SYMATTR InstName R3
SYMATTR Value 1.5k
SYMBOL res 344 264 R0
SYMATTR InstName R1
SYMATTR Value 1.5k
SYMBOL res 568 264 R0
SYMATTR InstName R2
SYMATTR Value 1.5k
SYMBOL voltage -728 -248 R0
SYMATTR InstName Vcc
SYMATTR Value 15
SYMBOL voltage -728 -120 R0
SYMATTR InstName Vee
SYMATTR Value 15
SYMBOL voltage -760 152 R0
SYMATTR Value SINE(0 0.1m 1k)
SYMATTR InstName Vin1
SYMBOL voltage -648 152 R0
SYMATTR InstName Vin2
SYMATTR Value SINE(0 0.1m 1k 0 0 90)
SYMBOL res 712 120 R0
SYMATTR InstName RL
SYMATTR Value 1000k
SYMBOL voltage -488 -88 R0
SYMATTR InstName V1
SYMATTR Value ac 0.1m 0
SYMBOL voltage -344 -88 R0
SYMATTR InstName V2
SYMATTR Value ac 0.1m 90