Version 4
SHEET 1 2260 680
WIRE 592 -160 512 -160
WIRE 720 -160 656 -160
WIRE 512 -48 512 -160
WIRE 576 -48 512 -48
WIRE 720 -48 720 -160
WIRE 720 -48 656 -48
WIRE -48 48 -352 48
WIRE 608 48 608 32
WIRE 304 64 240 64
WIRE 384 64 304 64
WIRE 512 64 512 -48
WIRE 512 64 464 64
WIRE 576 64 512 64
WIRE 240 80 240 64
WIRE 720 80 720 -48
WIRE 720 80 640 80
WIRE 912 80 720 80
WIRE 944 80 912 80
WIRE 192 96 128 96
WIRE 576 96 528 96
WIRE -48 112 -160 112
WIRE 608 128 608 112
WIRE 192 144 160 144
WIRE 528 144 528 96
WIRE 944 144 944 80
WIRE -352 160 -352 48
WIRE -160 160 -160 112
WIRE 160 176 160 144
WIRE 240 176 240 160
WIRE 240 176 160 176
WIRE 240 208 240 176
WIRE -352 256 -352 240
WIRE -160 256 -160 240
WIRE 944 272 944 224
WIRE 528 288 528 256
WIRE 720 288 720 256
WIRE 528 384 528 368
WIRE 720 384 720 368
FLAG -352 256 0
FLAG -160 256 0
FLAG 240 208 0
FLAG 528 144 0
FLAG 944 272 0
FLAG 528 384 0
FLAG 720 384 0
FLAG 608 32 V+
FLAG 608 128 V-
FLAG 528 256 V+
FLAG 720 256 V-
FLAG 912 80 out
FLAG 304 64 in2
FLAG -352 48 in1
FLAG -160 112 clk
SYMBOL voltage -352 144 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 -160 144 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 608 16 R0
SYMATTR InstName U1
SYMBOL res 480 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 22k
SYMBOL res 928 128 R0
SYMATTR InstName RL
SYMATTR Value 40k
SYMBOL cap 656 -176 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10µ
SYMBOL res 672 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL voltage 528 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 15
SYMBOL voltage 720 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value -15
TEXT -40 328 Left 2 !.param f_sample=20
TEXT -40 360 Left 2 !.tran 0 4 0 1m
TEXT 40 -152 Left 2 ;Tiefpass mit 3dB-Grenzfrequenz fg\nfg = 1/(2*pi*R*C)\nfg = 0.72Hz
TEXT -40 392 Left 2 !.options plotwinsize=0; compression off