Version 4
SHEET 1 880 680
WIRE 80 192 128 192
WIRE 128 192 128 208
WIRE -336 128 -336 96
WIRE -336 96 -320 96
WIRE -208 272 -208 256
WIRE -208 256 -128 256
WIRE -208 144 -208 128
WIRE -64 128 -208 128
WIRE -336 288 -336 256
WIRE -336 256 -320 256
WIRE -80 192 -64 192
WIRE -128 256 -128 160
WIRE -128 160 -64 160
WIRE 16 96 16 80
WIRE 16 224 16 240
WIRE 80 160 96 160
WIRE 80 128 96 128
FLAG 128 288 0
FLAG -320 96 vs+
FLAG -208 352 0
FLAG -208 224 0
FLAG -336 208 0
FLAG -336 368 0
FLAG -320 256 vs-
FLAG -80 192 0
FLAG 16 80 vs+
FLAG 16 240 vs-
FLAG 96 128 fo
FLAG 96 160 qb
SYMBOL SpecialFunctions\\b_vfc 0 160 R0
WINDOW 3 -63 92 Left 0
SYMATTR InstName X1
SYMATTR Value b_vfc
SYMBOL voltage 128 192 R0
WINDOW 3 -272 149 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 1 0 0 0 5e-6 10e-6)
SYMATTR InstName V1
SYMBOL voltage -336 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL voltage -336 272 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value -12
SYMBOL voltage -208 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 92 Left 0
SYMATTR Value 4
SYMATTR InstName V4
SYMBOL voltage -208 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 92 Left 0
SYMATTR Value -6
SYMATTR InstName V5
TEXT 16 304 Left 0 ;100kHz
TEXT -370 418 Left 0 !.tran 0 2m 1m