Version 4
SHEET 1 880 680
WIRE 432 0 240 0
WIRE -48 48 -352 48
WIRE 240 80 240 0
WIRE 192 96 128 96
WIRE -48 112 -160 112
WIRE 432 112 432 0
WIRE 192 144 160 144
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
FLAG -352 256 0
FLAG 432 192 0
FLAG -160 256 0
FLAG 240 208 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 5)
SYMBOL res 416 96 R0
SYMATTR InstName R1
SYMATTR Value 1k
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
TEXT -40 328 Left 2 !.param f_sample=20
TEXT -42 356 Left 2 !.tran 1