* SPICE netlist
Q5 N001 N006 N007 0 2N3904
Q7 N001 N007 A 0 2N2219A
Q8 A N013 N014 0 2N2219A
Q6 N013 N012 A 0 2N3906
V1 N001 0 10
V2 N014 0 -10
R11 N012 N014 5K
R14 A 0 8
R9 N006 N008 2K
R10 N008 N012 1K
Q4 N006 N008 N012 0 2N3904
Q1 N002 N009 N011 0 2N3904
Q2 N001 N010 N011 0 2N3904
R2 N001 N002 200
R3 N011 N014 1K
Q3 N006 N005 N004 0 2N3906
R6 N010 0 5K
R7 B N010 50K
V3 IN 0 SINE(0 .7 1K)
R1 N009 IN 5K
R8 N001 N004 100
R4 N003 N002 9K
C2 N006 N005 100p
C1 N003 N002 10p
R13 N013 N014 1K
R12 N007 A 1K
C3 N006 N012 .001
R5 N005 N003 1K
V4 A B AC 1
.tran 10m
.options maxstep=10u
.fourier 1K V(a)

* LTspice schematic (.asc)
Version 4
SHEET 1 1520 880
WIRE -376 -440 -536 -440
WIRE 72 -440 -376 -440
WIRE 424 -440 72 -440
WIRE 584 -440 424 -440
WIRE 680 -440 584 -440
WIRE 72 -424 72 -440
WIRE -536 -408 -536 -440
WIRE 680 -408 680 -440
WIRE -296 -392 -328 -392
WIRE -184 -392 -232 -392
WIRE 72 -328 72 -344
WIRE 680 -296 680 -328
WIRE -536 -280 -536 -328
WIRE -328 -280 -328 -392
WIRE -328 -280 -536 -280
WIRE -296 -280 -328 -280
WIRE -184 -280 -184 -392
WIRE -184 -280 -216 -280
WIRE -152 -280 -184 -280
WIRE -40 -280 -72 -280
WIRE 8 -280 -40 -280
WIRE 424 -248 424 -440
WIRE -40 -200 -40 -280
WIRE -24 -200 -40 -200
WIRE 72 -200 72 -232
WIRE 72 -200 40 -200
WIRE 200 -200 72 -200
WIRE 296 -200 200 -200
WIRE 360 -200 296 -200
WIRE 72 -184 72 -200
WIRE 584 -168 584 -440
WIRE 200 -136 200 -200
WIRE 296 -120 296 -200
WIRE 424 -120 424 -152
WIRE 520 -120 424 -120
WIRE 424 -104 424 -120
WIRE 72 -88 72 -104
WIRE 136 -88 72 -88
WIRE -536 -56 -536 -280
WIRE -376 -56 -376 -440
WIRE -696 -8 -760 -8
WIRE -600 -8 -616 -8
WIRE -296 -8 -312 -8
WIRE -232 -8 -296 -8
WIRE -120 -8 -152 -8
WIRE -88 -8 -120 -8
WIRE 8 -8 -8 -8
WIRE 424 -8 424 -24
WIRE 424 -8 8 -8
WIRE 584 -8 584 -72
WIRE 584 -8 424 -8
WIRE 760 -8 584 -8
WIRE 72 8 72 -88
WIRE -296 24 -296 -8
WIRE 760 24 760 -8
WIRE -760 40 -760 -8
WIRE 424 72 424 -8
WIRE -536 88 -536 40
WIRE -456 88 -536 88
WIRE -376 88 -376 40
WIRE -376 88 -456 88
WIRE 72 120 72 88
WIRE 200 120 200 -40
WIRE 200 120 72 120
WIRE 296 120 296 -56
WIRE 296 120 200 120
WIRE 360 120 296 120
WIRE -296 136 -296 104
WIRE 584 136 584 -8
WIRE 760 136 760 104
WIRE -456 152 -456 88
WIRE -760 168 -760 120
WIRE 72 168 72 120
WIRE 424 184 424 168
WIRE 520 184 424 184
WIRE 424 200 424 184
WIRE -456 296 -456 232
WIRE 72 296 72 248
WIRE 72 296 -456 296
WIRE 424 296 424 280
WIRE 424 296 72 296
WIRE 584 296 584 232
WIRE 584 296 424 296
WIRE 680 296 584 296
WIRE 680 344 680 296
WIRE 680 440 680 424
FLAG 680 -296 0
FLAG 680 440 0
FLAG 760 136 0
FLAG -296 136 0
FLAG -760 168 0
FLAG 8 -8 A
FLAG -120 -8 B
FLAG -760 -8 IN
SYMBOL NPN 360 -248 R0
SYMATTR InstName Q5
SYMATTR Value 2N3904
SYMBOL npn 520 -168 R0
SYMATTR InstName Q7
SYMATTR Value 2N2219A
SYMBOL npn 520 136 R0
SYMATTR InstName Q8
SYMATTR Value 2N2219A
SYMBOL PNP 360 168 M180
SYMATTR InstName Q6
SYMATTR Value 2N3906
SYMBOL VOLTAGE 680 -424 R0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL voltage 680 328 R0
SYMATTR InstName V2
SYMATTR Value -10
SYMBOL RES 56 152 R0
SYMATTR InstName R11
SYMATTR Value 5K
SYMBOL res 744 8 R0
SYMATTR InstName R14
SYMATTR Value 8
SYMBOL res 56 -200 R0
SYMATTR InstName R9
SYMATTR Value 2K
SYMBOL res 56 -8 R0
SYMATTR InstName R10
SYMATTR Value 1K
SYMBOL npn 136 -136 R0
SYMATTR InstName Q4
SYMATTR Value 2N3904
SYMBOL npn -600 -56 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL npn -312 -56 M0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL res -552 -424 R0
SYMATTR InstName R2
SYMATTR Value 200
SYMBOL res -472 136 R0
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL pnp 8 -232 M180
SYMATTR InstName Q3
SYMATTR Value 2N3906
SYMBOL res -312 8 R0
SYMATTR InstName R6
SYMATTR Value 5K
SYMBOL res -136 -24 R90
SYMATTR InstName R7
SYMATTR Value 50K
SYMBOL voltage -760 24 R0
SYMATTR InstName V3
SYMATTR Value SINE(0 .7 1K)
SYMBOL res -600 -24 R90
SYMATTR InstName R1
SYMATTR Value 5K
SYMBOL res 56 -440 R0
SYMATTR InstName R8
SYMATTR Value 100
SYMBOL res -200 -296 R90
SYMATTR InstName R4
SYMATTR Value 9K
SYMBOL cap 40 -216 R90
SYMATTR InstName C2
SYMATTR Value 100p
SYMBOL cap -232 -408 R90
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL res 408 184 R0
SYMATTR InstName R13
SYMATTR Value 1K
SYMBOL res 408 -120 R0
SYMATTR InstName R12
SYMATTR Value 1K
SYMBOL cap 280 -120 R0
SYMATTR InstName C3
SYMATTR Value .001
SYMBOL res -56 -296 R90
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL voltage 8 -8 R90
SYMATTR InstName V4
SYMATTR Value AC 1