Version 4
SHEET 1 1156 680
WIRE 96 -224 -32 -224
WIRE 208 -224 208 -272
WIRE 208 -224 96 -224
WIRE 544 -224 208 -224
WIRE -32 -208 -32 -224
WIRE 208 -160 208 -224
WIRE 160 -144 96 -144
WIRE -32 -112 -32 -144
WIRE 0 -112 -32 -112
WIRE 96 -112 96 -144
WIRE 96 -112 80 -112
WIRE 544 -48 544 -224
WIRE 208 -16 208 -64
WIRE 304 -16 208 -16
WIRE 432 -16 368 -16
WIRE -32 0 -32 -112
WIRE 208 48 208 -16
WIRE 272 48 208 48
WIRE 352 48 336 48
WIRE 432 48 432 -16
WIRE 432 48 416 48
WIRE 544 48 544 16
WIRE 544 48 496 48
WIRE 336 80 336 48
WIRE 544 80 544 48
WIRE 1024 80 1024 64
WIRE 208 112 208 48
WIRE -32 160 -32 64
WIRE -32 160 -304 160
WIRE 0 160 -32 160
WIRE 96 160 80 160
WIRE 336 160 336 144
WIRE 544 160 544 144
WIRE 544 160 336 160
WIRE 880 160 544 160
WIRE 544 176 544 160
WIRE 96 192 96 160
WIRE 160 192 96 192
WIRE 1024 208 1024 160
WIRE 208 272 208 208
WIRE 544 272 544 240
FLAG -240 -272 0
FLAG 208 -272 9V_BAT
FLAG -240 -352 9V_BAT
FLAG -304 240 0
FLAG 208 272 0
FLAG 544 272 0
FLAG 880 160 12V
FLAG 1024 64 12V
FLAG 1024 208 0
FLAG 96 272 0
SYMBOL voltage -240 -368 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 9
SYMBOL voltage -304 144 R0
WINDOW 0 -61 51 Left 2
WINDOW 3 -150 -26 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 -150 2 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 2m 10n 10n 5µ 10µ)
SYMATTR SpiceLine Rser=10
SYMBOL diode -16 -144 R180
WINDOW 0 -41 59 Left 2
WINDOW 3 -84 31 Left 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL cap -48 0 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 336 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 10µ
SYMBOL schottky 528 -48 R0
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 528 80 R0
SYMATTR InstName D3
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 528 176 R0
SYMATTR InstName C4
SYMATTR Value 10µ
SYMBOL res 1008 64 R0
SYMATTR InstName R4
SYMATTR Value 150
SYMBOL cap 496 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 10µ
SYMBOL schottky 416 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 36 21 VTop 2
SYMATTR InstName D4
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 304 0 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 84 34 VBottom 2
SYMATTR InstName D5
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 320 80 R0
WINDOW 0 46 32 Left 2
SYMATTR InstName D6
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 160 112 R0
SYMATTR InstName M1
SYMATTR Value BSS123
SYMBOL pmos 160 -64 M180
SYMATTR InstName M2
SYMATTR Value BSS84
SYMBOL res 80 -240 R0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 80 176 R0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 96 -128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 220
SYMBOL res 96 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 220
TEXT -368 80 Left 2 !.tran 10m startup
TEXT 224 -256 Left 2 ;12V input
TEXT 752 184 Left 2 ;-12V output
TEXT -240 184 Left 2 ;0-5V pulses\n50% duty cycle\nAbout 100 kHz
TEXT 1088 120 Left 2 ;Load