Version 4
SHEET 1 880 680
WIRE 176 -80 112 -80
WIRE 272 -80 256 -80
WIRE 112 16 112 -80
WIRE 176 16 112 16
WIRE 336 16 336 -80
WIRE 336 16 256 16
WIRE 192 128 192 112
WIRE -208 144 -320 144
WIRE -64 144 -208 144
WIRE 112 144 112 16
WIRE 112 144 16 144
WIRE 160 144 112 144
WIRE 336 160 336 16
WIRE 336 160 224 160
WIRE 384 160 336 160
WIRE 160 176 144 176
WIRE -320 192 -320 144
WIRE 192 208 192 192
WIRE -208 224 -208 144
WIRE -128 224 -208 224
WIRE 16 224 -48 224
WIRE 112 224 112 144
WIRE 112 224 80 224
WIRE 144 240 144 176
WIRE -320 288 -320 272
WIRE 336 288 336 256
WIRE 448 288 448 256
WIRE 336 400 336 368
WIRE 448 400 448 368
FLAG 144 240 0
FLAG -320 288 0
FLAG 384 160 out
FLAG 336 400 0
FLAG 448 400 0
FLAG 336 256 V+
FLAG 448 256 V-
FLAG 192 112 V+
FLAG 192 208 V-
SYMBOL res 32 128 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 36 54 VTop 0
SYMATTR InstName R1
SYMATTR Value 27k
SYMBOL res 272 -96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap 80 208 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 1.5n
SYMBOL cap 336 -96 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C2
SYMATTR Value 33n
SYMBOL voltage -320 176 R0
WINDOW 3 -33 152 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 -1 1n 10u 10u 1 2)
SYMATTR InstName V1
SYMBOL Opamps\\opamp2 192 96 R0
SYMATTR InstName U1
SYMATTR Value LM358/NS
SYMBOL voltage 336 272 R0
SYMATTR InstName V2
SYMATTR Value 9
SYMBOL voltage 448 272 R0
SYMATTR InstName V3
SYMATTR Value -9
SYMBOL res 160 32 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R3
SYMATTR Value 1meg
SYMBOL res -144 240 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R4
SYMATTR Value 1k
TEXT -264 -32 Left 0 !.tran 0 5m 0 1u
TEXT -264 16 Left 0 !.inc LM358.mod