Version 4
SHEET 1 944 680
WIRE 384 48 240 48
WIRE 240 64 240 48
WIRE 192 80 160 80
WIRE 384 112 384 48
WIRE 64 128 16 128
WIRE 192 128 64 128
WIRE 544 144 464 144
WIRE 240 160 240 144
WIRE 272 160 240 160
WIRE 384 160 384 112
WIRE 384 160 336 160
WIRE 464 160 464 144
WIRE 704 160 704 80
WIRE 416 176 352 176
WIRE 160 192 160 80
WIRE 544 208 544 144
WIRE 576 208 544 208
WIRE 608 208 576 208
WIRE 640 208 608 208
WIRE 800 208 768 208
WIRE 64 224 32 224
WIRE 160 224 160 192
WIRE 160 224 128 224
WIRE 240 224 240 160
WIRE 256 224 240 224
WIRE 384 224 384 160
WIRE 384 224 336 224
WIRE 416 224 384 224
WIRE 240 256 240 224
WIRE 464 256 464 240
WIRE 480 256 464 256
WIRE 576 256 576 208
WIRE 576 256 560 256
WIRE 352 272 352 176
WIRE 464 272 464 256
WIRE 32 288 32 224
WIRE 32 288 -16 288
WIRE 48 288 32 288
WIRE 160 288 160 224
WIRE 160 288 128 288
WIRE 160 304 160 288
WIRE 240 304 240 256
WIRE 352 304 352 272
WIRE 464 304 464 272
WIRE 16 320 16 128
WIRE 16 416 16 400
WIRE 160 416 160 384
WIRE 160 416 16 416
WIRE 240 416 240 384
WIRE 240 416 160 416
WIRE 352 416 352 384
WIRE 352 416 240 416
WIRE 464 416 464 384
WIRE 464 416 352 416
WIRE 16 448 16 416
FLAG 16 448 0
FLAG 704 80 VDD
FLAG 800 208 UOUT
IOPIN 800 208 Out
FLAG -16 288 SZAB
IOPIN -16 288 In
FLAG 608 208 SW
FLAG 64 128 UBG
FLAG 384 112 ERR
FLAG 240 256 UG10
FLAG 464 272 UG20
FLAG 160 192 UC
FLAG 352 272 RAMP
SYMBOL res 144 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 90K
SYMBOL res 176 400 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL stepup1 704 208 R0
SYMATTR InstName STU
SYMBOL voltage 352 288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -38 152 Left 2
WINDOW 0 21 21 Left 2
SYMATTR Value PULSE(471m 3.06 10u 49u 49u 0.5u 99u)
SYMATTR InstName VRMP
SYMBOL voltage 16 304 R0
SYMATTR InstName VBG
SYMATTR Value 1.2
SYMBOL voltage 240 288 R0
SYMATTR InstName V1
SYMATTR Value 2.4
SYMBOL g 240 48 R0
WINDOW 3 37 41 Left 2
SYMATTR Value table=(-10m -1m, 10m 1m)
SYMATTR InstName G1
SYMBOL res 352 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 700
SYMBOL voltage 464 288 R0
SYMATTR InstName V2
SYMATTR Value 2.5
SYMBOL g 464 144 R0
WINDOW 3 0 -18 Left 2
SYMATTR Value table=(-10u -2.5m, 10u 2.5m)
SYMATTR InstName G2
SYMBOL res 576 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL cap 336 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 50p
SYMBOL cap 128 208 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 300f