Version 4
SHEET 1 948 680
WIRE 464 48 464 32
WIRE 64 112 64 96
WIRE 32 128 -64 128
WIRE -64 144 -64 128
WIRE 144 144 96 144
WIRE 208 144 144 144
WIRE 464 144 464 128
WIRE 464 144 432 144
WIRE 32 160 16 160
WIRE 144 160 144 144
WIRE 208 160 208 144
WIRE 432 160 432 144
WIRE 464 160 464 144
WIRE 64 192 64 176
WIRE -64 240 -64 224
WIRE 16 256 16 160
WIRE 144 256 144 240
WIRE 144 256 16 256
WIRE 208 256 208 240
WIRE 272 256 208 256
WIRE 368 256 352 256
WIRE 464 256 464 240
WIRE 144 272 144 256
WIRE 208 272 208 256
WIRE 368 272 368 256
WIRE 144 368 144 352
WIRE 208 368 208 352
WIRE 208 368 144 368
WIRE 368 368 368 352
WIRE 208 384 208 368
WIRE 208 480 208 464
FLAG 208 480 0
FLAG 368 368 0
FLAG 432 160 0
FLAG -64 240 0
FLAG 64 192 +15V
FLAG 464 32 +15V
FLAG 64 96 -15V
FLAG 464 256 -15V
SYMBOL Opamps\\LT1357 64 208 M180
SYMATTR InstName U1
SYMBOL res 192 144 R0
SYMATTR InstName R1
SYMATTR Value 2.4
SYMBOL res 192 256 R0
SYMATTR InstName R2
SYMATTR Value 2.4
SYMBOL res 192 368 R0
SYMATTR InstName R3
SYMATTR Value 2400
SYMBOL res 128 144 R0
SYMATTR InstName R4
SYMATTR Value 500
SYMBOL res 128 256 R0
SYMATTR InstName R5
SYMATTR Value 500
SYMBOL res 368 240 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R6
SYMATTR Value 1k
SYMBOL voltage 464 32 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage 464 144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage 368 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(-1 1 500us 100ns 100ns 500us 1ms 3)
SYMBOL voltage -64 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value 10
TEXT -96 504 Left 0 !.tran 0 3ms 0 100ns