Version 4
SHEET 1 1640 680
WIRE 560 -192 304 -192
WIRE 560 -176 560 -192
WIRE 1040 -176 928 -176
WIRE 928 -160 928 -176
WIRE -64 -144 -160 -144
WIRE 208 -144 -64 -144
WIRE -160 -128 -160 -144
WIRE 1040 -128 1040 -176
WIRE 208 -112 208 -144
WIRE 304 -112 304 -192
WIRE 560 -80 560 -96
WIRE -64 -48 -64 -144
WIRE 0 -48 -64 -48
WIRE 112 -48 80 -48
WIRE 608 -48 416 -48
WIRE 672 -48 608 -48
WIRE 784 -48 752 -48
WIRE 928 -48 928 -80
WIRE 928 -48 848 -48
WIRE -160 -32 -160 -48
WIRE 608 -32 608 -48
WIRE 1040 -32 1040 -48
WIRE -400 32 -416 32
WIRE 112 32 -320 32
WIRE 432 32 416 32
WIRE 544 32 512 32
WIRE 608 48 608 32
WIRE 112 112 96 112
WIRE 432 112 416 112
WIRE 544 112 544 32
WIRE 544 112 512 112
WIRE 928 112 928 -48
WIRE -64 192 -64 -48
WIRE -48 192 -64 192
WIRE 112 192 32 192
WIRE 544 192 544 112
WIRE 544 192 416 192
WIRE 880 192 544 192
WIRE 928 224 928 208
WIRE -64 272 -64 192
WIRE 16 272 -64 272
WIRE 112 272 96 272
WIRE 464 272 416 272
WIRE 528 272 464 272
WIRE 464 288 464 272
WIRE 208 352 208 336
WIRE 304 384 304 336
WIRE 464 384 464 368
WIRE 464 384 304 384
FLAG 608 48 0
FLAG 208 352 0
FLAG 96 112 0
FLAG -416 32 0
FLAG -160 -32 0
FLAG 528 272 0
FLAG 928 224 0
FLAG 560 -80 0
FLAG 1040 -32 0
SYMBOL res 416 48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 3.9
SYMBOL res 416 128 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 3.9
SYMBOL res 96 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 48 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL res 112 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL diode 784 -64 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value MMSD4148
SYMBOL res 768 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 1K
SYMBOL cap 592 -32 R0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL voltage -304 32 R90
WINDOW 3 32 56 VTop 2
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
SYMATTR Value PULSE(0 5 0 2n 2n 5u 10u)
SYMATTR InstName V1
SYMBOL voltage -160 -144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage 560 -192 R0
WINDOW 123 24 138 Left 2
WINDOW 39 24 117 Left 2
SYMATTR InstName V3
SYMATTR Value 15
SYMBOL voltage 1040 -144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value 80
SYMBOL nmos 880 112 R0
SYMATTR InstName Q1
SYMATTR Value BSC12DN20NS3
SYMBOL res 912 -176 R0
SYMATTR InstName R7
SYMATTR Value 1
SYMBOL voltage 464 272 R0
WINDOW 123 24 138 Left 2
WINDOW 39 24 117 Left 2
SYMATTR InstName V5
SYMATTR Value 5
SYMBOL ADUm4135 256 32 R0
SYMATTR InstName U1
TEXT 648 336 Left 2 !.tran 40u