Version 4
SHEET 1 880 680
WIRE 576 -304 384 -304
WIRE 384 -256 384 -304
WIRE 576 -256 576 -304
WIRE 192 -224 96 -224
WIRE 256 -224 192 -224
WIRE 192 -192 192 -224
WIRE 384 -112 384 -176
WIRE 192 -80 144 -80
WIRE 320 -64 256 -64
WIRE 112 -48 80 -48
WIRE 192 -48 112 -48
WIRE 80 0 80 -48
WIRE 144 16 144 -80
WIRE 384 16 384 -16
WIRE 384 16 144 16
WIRE 384 48 384 16
WIRE 80 112 80 80
WIRE 384 160 384 128
WIRE 576 160 576 -176
WIRE 576 160 384 160
WIRE 80 208 80 192
WIRE 384 208 384 160
FLAG 80 208 0
FLAG 384 208 0
FLAG 224 -96 V+
FLAG 224 -32 V-
FLAG 256 -304 V+
FLAG 96 -144 V-
FLAG 192 -192 0
FLAG 112 -48 IN
SYMBOL res 368 32 R0
SYMATTR InstName R1
SYMATTR Value 50
SYMBOL res 368 -272 R0
SYMATTR InstName R2
SYMATTR Value 150
SYMBOL npn 320 -112 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL voltage 80 -16 R0
WINDOW 3 24 44 Left 2
WINDOW 123 24 72 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(0.75 0.75 500)
SYMATTR InstName V1
SYMBOL voltage 576 -272 R0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL Opamps\\AD8552 224 -128 R0
SYMATTR InstName U1
SYMBOL voltage 256 -320 R0
SYMATTR InstName V3
SYMATTR Value 10
SYMBOL voltage 96 -240 R0
SYMATTR InstName V4
SYMATTR Value 10
SYMBOL voltage 80 96 R0
WINDOW 3 24 44 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value 0
SYMATTR InstName V5
TEXT 32 296 Left 2 !.tran 0 10ms 0 100us