* SPICE netlist
Q4 N009 In+ N005 0 BC557B
Q5 N010 In- N006 0 BC557B
R1 N009 V- 2.2k
R3 V+ N004 3.3k
R4 V+ N001 2.2k
R2 N010 V- 100
R9 N007 N008 8k
R10 N008 OUT 120
Q2 V+ N001 N003 0 NPN
Q3 V+ N003 OUT 0 NPN
R11 N001 N003 8k
R12 N003 OUT 120
Q6 V- N008 OUT 0 PNP
Q7 V- N007 N008 0 PNP
Q1 N007 N009 N011 0 BC547C
C1 N007 N009 10p
D1 P001 P002 1N4148
D2 P002 P003 1N4148
D3 P003 N007 1N4148
D4 N002 P001 1N4148
D5 N001 N002 1N4148
R13 N004 N005 50
R14 N004 N006 50
R16 N011 V- 56

* LTspice schematic (.asc)
Version 4.1
SHEET 1 896 736
WIRE -288 -352 -320 -352
WIRE -16 -352 -288 -352
WIRE 352 -352 -16 -352
WIRE 352 -304 352 -352
WIRE 352 -304 240 -304
WIRE -16 -256 -16 -272
WIRE 144 -256 -16 -256
WIRE 176 -256 144 -256
WIRE 352 -240 352 -304
WIRE -288 -208 -288 -352
WIRE -16 -192 -16 -208
WIRE 240 -192 240 -208
WIRE 288 -192 240 -192
WIRE 144 -112 144 -256
WIRE 240 -112 240 -192
WIRE 240 -112 224 -112
WIRE 256 -112 240 -112
WIRE 352 -112 352 -144
WIRE 352 -112 336 -112
WIRE 368 -112 352 -112
WIRE -288 -80 -288 -128
WIRE -288 -80 -368 -80
WIRE -224 -80 -288 -80
WIRE 368 -64 368 -112
WIRE 448 -64 368 -64
WIRE -368 -48 -368 -80
WIRE -224 -48 -224 -80
WIRE -368 96 -368 32
WIRE -224 96 -224 32
WIRE -16 96 -16 64
WIRE 96 96 -16 96
WIRE -432 144 -448 144
WIRE -16 144 -16 96
WIRE 256 176 240 176
WIRE 272 176 256 176
WIRE 368 176 368 -64
WIRE 368 176 352 176
WIRE -80 192 -80 96
WIRE 368 208 368 176
WIRE -368 224 -368 192
WIRE -80 224 -80 192
WIRE -80 224 -368 224
WIRE -224 240 -224 192
WIRE -368 256 -368 224
WIRE 256 256 256 176
WIRE 304 256 256 256
WIRE -16 272 -16 240
WIRE 256 272 256 256
WIRE 96 320 96 96
WIRE 160 320 160 176
WIRE 160 320 96 320
WIRE 192 320 160 320
WIRE -368 368 -368 336
WIRE -368 368 -384 368
WIRE -224 368 -224 320
WIRE -224 368 -368 368
WIRE -16 368 -16 352
WIRE -16 368 -224 368
WIRE 256 368 -16 368
WIRE 368 368 368 304
WIRE 368 368 256 368
FLAG -320 -352 V+
IOPIN 16 -336 In
FLAG -384 368 V-
IOPIN -48 384 In
FLAG -448 144 In+
IOPIN -112 160 In
FLAG -160 144 In-
IOPIN 176 160 In
FLAG 448 -64 OUT
IOPIN 784 -48 Out
SYMBOL pnp -432 192 M180
SYMATTR Value BC557B
SYMATTR InstName Q4
SYMBOL pnp -160 192 R180
SYMATTR Value BC557B
SYMATTR InstName Q5
SYMBOL res -384 240 R0
SYMATTR InstName R1
SYMATTR Value 2.2k
SYMBOL res -304 -224 R0
SYMATTR InstName R3
SYMATTR Value 3.3k
SYMBOL res -32 -368 R0
SYMATTR InstName R4
SYMATTR Value 2.2k
SYMBOL res -240 224 R0
SYMATTR InstName R2
SYMATTR Value 100
SYMBOL res 144 160 M90
SYMATTR InstName R9
SYMATTR Value 8k
SYMBOL res 256 160 M90
SYMATTR InstName R10
SYMATTR Value 120
SYMBOL npn 176 -304 R0
SYMATTR InstName Q2
SYMBOL npn 288 -240 R0
SYMATTR InstName Q3
SYMBOL res 128 -96 R270
SYMATTR InstName R11
SYMATTR Value 8k
SYMBOL res 240 -96 R270
SYMATTR InstName R12
SYMATTR Value 120
SYMBOL pnp 304 304 M180
SYMATTR InstName Q6
SYMBOL pnp 192 368 M180
SYMATTR InstName Q7
SYMBOL npn -80 144 R0
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL cap -16 80 R90
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL diode -32 -128 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode -32 -64 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL diode -32 0 R0
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL diode -32 -192 R0
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL diode -32 -256 R0
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL res -384 -64 R0
SYMATTR InstName R13
SYMATTR Value 50
SYMBOL res -240 -64 R0
SYMATTR InstName R14
SYMATTR Value 50
SYMBOL res -32 256 R0
SYMATTR InstName R16
SYMATTR Value 56