Version 4
SHEET 1 880 680
WIRE -864 -256 -928 -256
WIRE -736 -256 -816 -256
WIRE -640 -256 -736 -256
WIRE -496 -256 -560 -256
WIRE -384 -256 -496 -256
WIRE -1232 -240 -1424 -240
WIRE -1040 -240 -1088 -240
WIRE -992 -240 -1040 -240
WIRE -816 -224 -816 -256
WIRE -1424 -208 -1424 -240
WIRE -864 -208 -864 -256
WIRE -384 -208 -384 -256
WIRE -496 -192 -496 -256
WIRE -1424 -112 -1424 -128
WIRE -864 -112 -864 -160
WIRE -816 -112 -816 -144
WIRE -496 -80 -496 -128
WIRE -384 -80 -384 -128
WIRE -384 -80 -496 -80
WIRE -496 -32 -496 -80
FLAG -496 -32 0
FLAG -1424 -112 0
FLAG -736 -256 rect
FLAG -1040 -240 sin
FLAG -384 -256 out
FLAG -864 -112 0
FLAG -816 -112 0
SYMBOL cap -512 -192 R0
SYMATTR InstName C1
SYMATTR Value 2.2n
SYMBOL res -400 -224 R0
SYMATTR InstName R1
SYMATTR Value 100Meg
SYMBOL res -544 -272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL SpecialFunctions\\modulate2 -1232 -240 R0
WINDOW 39 -26 122 Left 2
SYMATTR InstName A1
SYMATTR SpiceLine space=0 mark=1meg
SYMBOL Digital\\schmitt -992 -304 R0
WINDOW 39 0 114 Left 2
WINDOW 40 -1 146 Left 2
SYMATTR InstName A2
SYMATTR SpiceLine Vt=0
SYMATTR SpiceLine2 tripdt=1n
SYMBOL bv -1424 -224 R0
WINDOW 3 -13 157 Left 2
SYMATTR InstName B1
SYMATTR Value V=1m*10**(time*3/100m)
SYMBOL e -816 -240 R0
SYMATTR InstName E1
SYMATTR Value 100
TEXT -1456 40 Left 2 ;.step param R_v 10k 60k 50k\n.step param pulse 1u 499u 250u
TEXT -1032 80 Left 2 !.model SWITCH SW(Ron=1 Roff=100Meg Vt=.5 Vh=-.4)
TEXT -496 -320 Left 2 ;LAST
TEXT -1456 112 Left 2 ;.ac lin 100 2khz 100Meghz
TEXT -1456 152 Left 2 !.tran 100m
TEXT -1032 48 Left 2 !.param R_v=10k
TEXT -1032 120 Left 2 ;Plot x.axis:  1k*10**(time*3/100m)
RECTANGLE Normal -256 -64 -656 -304 2