Version 4
SHEET 1 2260 680
WIRE 720 -160 640 -160
WIRE 848 -160 784 -160
WIRE 640 -48 640 -160
WIRE 704 -48 640 -48
WIRE 848 -48 848 -160
WIRE 848 -48 784 -48
WIRE -48 48 -352 48
WIRE 512 64 240 64
WIRE 640 64 640 -48
WIRE 640 64 592 64
WIRE 704 64 640 64
WIRE 240 80 240 64
WIRE 848 80 848 -48
WIRE 848 80 768 80
WIRE 1072 80 848 80
WIRE 192 96 128 96
WIRE 704 96 656 96
WIRE -48 112 -160 112
WIRE 192 144 160 144
WIRE 656 144 656 96
WIRE 1072 144 1072 80
WIRE -352 176 -352 48
WIRE -160 176 -160 112
WIRE 160 176 160 144
WIRE 240 176 240 160
WIRE 240 176 160 176
WIRE 240 208 240 176
WIRE 1072 272 1072 224
FLAG -352 256 0
FLAG -160 256 0
FLAG 240 208 0
FLAG 656 144 0
FLAG 1072 272 0
SYMBOL voltage -352 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(5 5 1)
SYMBOL SpecialFunctions\\sample 32 80 R0
SYMATTR InstName A1
SYMBOL voltage -160 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 10 0 1u 1u {1/2/f_sample} {1/f_sample})
SYMBOL e 240 64 R0
SYMATTR InstName E1
SYMATTR Value 1
SYMBOL Opamps\\LT1013 736 16 R0
SYMATTR InstName U1
SYMBOL res 608 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 22k
SYMBOL res 1056 128 R0
SYMATTR InstName R2
SYMATTR Value 40k
SYMBOL cap 784 -176 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL res 800 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 22k
TEXT -40 328 Left 2 !.param f_sample=20
TEXT -40 360 Left 2 !.tran 1