* SPICE netlist
Q1 N002 N002 N001 0 P
Q2 A N002 N001 0 P
R1 N010 0 1210
Q3 N002 N009 N010 0 N 10
Q4 N009 N009 0 0 N
V1 N001 0 3
R2 A N009 10K
Q5 N007 N003 N001 0 P
Q6 N003 N003 N001 0 P
R3 N016 0 1270
Q7 N007 N012 0 0 N
Q8 N012 N012 N016 0 N 10
R4 B N012 10K
Q9 N003 N007 B 0 N
Q10 N008 N004 N001 0 P
Q11 N004 N004 N001 0 P
R5 N013 N015 1250
Q12 N008 C N015 0 N
Q13 C C N013 0 N 10
R6 N015 0 5K
Q14 N004 N008 C 0 N
Q15 N006 N005 N001 0 P
Q16 N005 N005 N001 0 P
R7 N011 N014 1250
Q17 N006 D N014 0 N
Q18 N005 D N011 0 N 10
R8 N014 0 5K
Q19 N001 N006 D 0 N
.dc temp -55 125 .1

* LTspice schematic (.asc)
Version 4
SHEET 1 1600 592
WIRE -592 -296 -800 -296
WIRE -432 -296 -592 -296
WIRE -240 -296 -432 -296
WIRE -48 -296 -240 -296
WIRE 144 -296 -48 -296
WIRE 336 -296 144 -296
WIRE 528 -296 336 -296
WIRE 608 -296 528 -296
WIRE 736 -296 608 -296
WIRE -592 -280 -592 -296
WIRE -432 -280 -432 -296
WIRE -240 -280 -240 -296
WIRE -48 -280 -48 -296
WIRE 144 -280 144 -296
WIRE 336 -280 336 -296
WIRE 528 -280 528 -296
WIRE 736 -280 736 -296
WIRE -800 -264 -800 -296
WIRE -512 -232 -528 -232
WIRE -496 -232 -512 -232
WIRE -144 -232 -176 -232
WIRE -112 -232 -144 -232
WIRE 240 -232 208 -232
WIRE 272 -232 240 -232
WIRE 640 -232 592 -232
WIRE 672 -232 640 -232
WIRE 608 -184 608 -296
WIRE -592 -168 -592 -184
WIRE -512 -168 -512 -232
WIRE -512 -168 -592 -168
WIRE -432 -168 -432 -184
WIRE -384 -168 -432 -168
WIRE -144 -168 -144 -232
WIRE -48 -168 -48 -184
WIRE -48 -168 -144 -168
WIRE 240 -168 240 -232
WIRE 336 -168 336 -184
WIRE 336 -168 240 -168
WIRE 640 -168 640 -232
WIRE 736 -168 736 -184
WIRE 736 -168 640 -168
WIRE -800 -152 -800 -184
WIRE -432 -152 -432 -168
WIRE -48 -152 -48 -168
WIRE 336 -152 336 -168
WIRE 528 -136 528 -184
WIRE 544 -136 528 -136
WIRE -592 -104 -592 -168
WIRE -240 -104 -240 -184
WIRE -112 -104 -240 -104
WIRE 144 -104 144 -184
WIRE 272 -104 144 -104
WIRE 144 -88 144 -104
WIRE 528 -88 528 -136
WIRE 736 -88 736 -168
WIRE -496 -56 -528 -56
WIRE -432 -56 -432 -72
WIRE -432 -56 -496 -56
WIRE -432 -40 -432 -56
WIRE -48 -40 -48 -56
WIRE 0 -40 -48 -40
WIRE 240 -40 208 -40
WIRE 336 -40 336 -56
WIRE 336 -40 240 -40
WIRE 384 -40 336 -40
WIRE 608 -40 608 -88
WIRE 608 -40 592 -40
WIRE 672 -40 608 -40
WIRE 800 -40 672 -40
WIRE -48 -24 -48 -40
WIRE 336 -24 336 -40
WIRE -592 8 -592 -8
WIRE -496 8 -496 -56
WIRE -240 24 -240 -104
WIRE 240 24 240 -40
WIRE 272 24 240 24
WIRE 736 24 736 8
WIRE -144 72 -176 72
WIRE -48 72 -48 56
WIRE -48 72 -144 72
WIRE -48 88 -48 72
WIRE 336 88 336 72
WIRE -592 104 -592 88
WIRE -432 104 -432 56
WIRE 528 120 528 8
WIRE 736 120 736 104
WIRE 736 120 528 120
WIRE -240 136 -240 120
WIRE -144 136 -144 72
WIRE -112 136 -144 136
WIRE 736 136 736 120
WIRE 144 184 144 8
WIRE 336 184 336 168
WIRE 336 184 144 184
WIRE -48 200 -48 184
WIRE 336 200 336 184
WIRE 736 232 736 216
WIRE -48 296 -48 280
WIRE 336 296 336 280
FLAG -592 104 0
FLAG -800 -152 0
FLAG -432 104 0
FLAG -48 296 0
FLAG -384 -168 A
FLAG 0 -40 B
FLAG -240 136 0
FLAG 336 296 0
FLAG 384 -40 C
FLAG 736 232 0
FLAG 800 -40 D
SYMBOL pnp -528 -184 R180
SYMATTR InstName Q1
SYMATTR Value P
SYMBOL pnp -496 -184 M180
SYMATTR InstName Q2
SYMATTR Value P
SYMBOL res -608 -8 R0
SYMATTR InstName R1
SYMATTR Value 1210
SYMBOL npn -528 -104 M0
SYMATTR InstName Q3
SYMATTR Value N  10
SYMBOL npn -496 -40 R0
SYMATTR InstName Q4
SYMATTR Value N
SYMBOL voltage -800 -280 R0
SYMATTR InstName V1
SYMATTR Value 3
SYMBOL res -448 -168 R0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL pnp -176 -184 R180
SYMATTR InstName Q5
SYMATTR Value P
SYMBOL pnp -112 -184 M180
SYMATTR InstName Q6
SYMATTR Value P
SYMBOL res -64 184 R0
SYMATTR InstName R3
SYMATTR Value 1270
SYMBOL npn -176 24 M0
SYMATTR InstName Q7
SYMATTR Value N
SYMBOL npn -112 88 R0
SYMATTR InstName Q8
SYMATTR Value N  10
SYMBOL res -64 -40 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL npn -112 -152 R0
SYMATTR InstName Q9
SYMATTR Value N
SYMBOL pnp 208 -184 R180
SYMATTR InstName Q10
SYMATTR Value P
SYMBOL pnp 272 -184 M180
SYMATTR InstName Q11
SYMATTR Value P
SYMBOL res 320 72 R0
SYMATTR InstName R5
SYMATTR Value 1250
SYMBOL npn 208 -88 M0
SYMATTR InstName Q12
SYMATTR Value N
SYMBOL npn 272 -24 R0
SYMATTR InstName Q13
SYMATTR Value N  10
SYMBOL res 320 184 R0
SYMATTR InstName R6
SYMATTR Value 5K
SYMBOL npn 272 -152 R0
SYMATTR InstName Q14
SYMATTR Value N
SYMBOL pnp 592 -184 R180
SYMATTR InstName Q15
SYMATTR Value P
SYMBOL pnp 672 -184 M180
SYMATTR InstName Q16
SYMATTR Value P
SYMBOL res 720 8 R0
SYMATTR InstName R7
SYMATTR Value 1250
SYMBOL npn 592 -88 M0
SYMATTR InstName Q17
SYMATTR Value N
SYMBOL npn 672 -88 R0
SYMATTR InstName Q18
SYMATTR Value N  10
SYMBOL res 720 120 R0
SYMATTR InstName R8
SYMATTR Value 5K
SYMBOL npn 544 -184 R0
SYMATTR InstName Q19
SYMATTR Value N