Version 4
SHEET 1 880 680
WIRE -864 -256 -928 -256
WIRE -720 -256 -816 -256
WIRE -640 -256 -720 -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 -496 -224 -496 -256
WIRE -384 -224 -384 -256
WIRE -1424 -208 -1424 -240
WIRE -864 -208 -864 -256
WIRE -1424 -112 -1424 -128
WIRE -864 -112 -864 -160
WIRE -816 -112 -816 -144
WIRE -496 -112 -496 -160
WIRE -384 -112 -384 -144
WIRE -832 80 -944 80
WIRE -672 80 -752 80
WIRE -944 112 -944 80
WIRE -672 128 -672 80
WIRE -944 208 -944 192
WIRE -672 208 -672 192
FLAG -496 -112 0
FLAG -1424 -112 0
FLAG -1040 -240 sin
FLAG -864 -112 0
FLAG -816 -112 0
FLAG -384 -112 0
FLAG -720 -256 1
FLAG -944 208 0
FLAG -944 80 P
FLAG -864 -256 10
FLAG -672 208 0
FLAG -672 80 PM
SYMBOL cap -512 -224 R0
SYMATTR InstName C1
SYMATTR Value 2.214n
SYMBOL res -400 -240 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 {R_v}
SYMBOL SpecialFunctions\\modulate2 -1232 -240 R0
WINDOW 39 -26 122 Left 2
SYMATTR SpiceLine space=0 mark=1meg
SYMATTR InstName A1
SYMBOL Digital\\schmitt -992 -304 R0
WINDOW 39 0 114 Left 2
WINDOW 40 -1 146 Left 2
SYMATTR SpiceLine Vt=0
SYMATTR SpiceLine2 tripdt=1n
SYMATTR InstName A2
SYMBOL bv -1424 -224 R0
WINDOW 3 -13 157 Left 2
SYMATTR Value V=2m*10**(time*3/100m)
SYMATTR InstName B1
SYMBOL e -816 -240 R0
SYMATTR InstName E1
SYMATTR Value 1000
SYMBOL bv -944 96 R0
SYMATTR InstName B2
SYMATTR Value V=-V(1)*I(E1)
SYMBOL res -848 96 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL cap -688 128 R0
SYMATTR InstName C3
SYMATTR Value 1µ
TEXT -1416 104 Left 2 !.step param R_v list 10k 30k 60k
TEXT -496 -320 Left 2 ;LAST
TEXT -1416 136 Left 2 !.tran 100m
RECTANGLE Normal -256 -64 -656 -304 2