Version 4
SHEET 1 1536 680
WIRE 176 -240 128 -240
WIRE 272 -240 240 -240
WIRE -48 -144 -128 -144
WIRE 16 -144 -48 -144
WIRE 128 -144 128 -240
WIRE 128 -144 16 -144
WIRE 160 -144 128 -144
WIRE 272 -144 272 -240
WIRE 272 -144 240 -144
WIRE -128 -96 -128 -144
WIRE -48 -96 -48 -144
WIRE 16 -96 16 -144
WIRE 128 -32 128 -144
WIRE 160 -32 128 -32
WIRE 272 -16 272 -144
WIRE 272 -16 224 -16
WIRE 304 -16 272 -16
WIRE 160 0 128 0
WIRE -128 16 -128 -16
WIRE -48 16 -48 -16
WIRE -48 16 -128 16
WIRE 16 16 16 -32
WIRE 16 16 -48 16
WIRE -128 32 -128 16
WIRE 128 32 128 0
FLAG 192 -48 V+
FLAG 192 16 V-
FLAG 304 -16 out
IOPIN 304 -16 Out
FLAG 128 32 0
FLAG -48 208 0
FLAG -48 128 V+
FLAG 32 208 0
FLAG 32 128 V-
FLAG -128 32 0
SYMBOL res 256 -160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Rf
SYMATTR Value 100k
SYMBOL cap 176 -224 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName Cf
SYMATTR Value {Cc}
SYMBOL Opamps\\LT1122 192 -80 R0
SYMATTR InstName U1
SYMBOL voltage -48 112 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage 32 112 R0
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL res -64 -112 R0
WINDOW 0 23 50 Left 2
WINDOW 3 25 85 Left 2
SYMATTR InstName R1
SYMATTR Value 1G
SYMBOL cap 0 -96 R0
WINDOW 0 38 33 Left 2
WINDOW 3 32 71 Left 2
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL current -128 -96 R0
WINDOW 0 35 34 Left 2
WINDOW 123 -40 151 Left 1
WINDOW 39 0 0 Left 0
WINDOW 3 -45 150 Left 1
SYMATTR InstName I1
SYMATTR Value PULSE(0 1u 10u 1n 1n 9.999u 20u)
TEXT 136 152 Left 2 !.tran 50u
TEXT 136 184 Left 2 !.step param Cc LIST 1p 2p 10p
RECTANGLE Normal 80 64 -176 -160 2