Version 4
SHEET 1 968 680
WIRE 512 -496 128 -496
WIRE 640 -496 576 -496
WIRE 688 -496 640 -496
WIRE 800 -496 752 -496
WIRE 912 -496 800 -496
WIRE 640 -416 640 -496
WIRE 800 -416 800 -496
WIRE 912 -416 912 -496
WIRE 128 -352 128 -496
WIRE 128 -256 128 -272
WIRE 128 -256 16 -256
WIRE 400 -256 128 -256
WIRE 512 -256 400 -256
WIRE 640 -256 640 -352
WIRE 640 -256 576 -256
WIRE 800 -256 800 -352
WIRE 800 -256 640 -256
WIRE 912 -256 912 -336
WIRE 912 -256 800 -256
WIRE 16 -224 16 -256
WIRE 400 -112 400 -256
WIRE 496 -112 400 -112
WIRE 640 -112 640 -256
WIRE 640 -112 576 -112
WIRE 48 64 -48 64
WIRE 400 64 128 64
WIRE 512 64 400 64
WIRE 640 64 576 64
WIRE 688 64 640 64
WIRE 800 64 752 64
WIRE 912 64 800 64
WIRE 400 80 400 64
WIRE -48 128 -48 64
WIRE 640 144 640 64
WIRE 800 144 800 64
WIRE 912 144 912 64
WIRE 208 160 128 160
WIRE 320 160 288 160
WIRE 400 176 400 160
WIRE 128 208 128 160
WIRE 320 224 320 160
WIRE 336 224 320 224
WIRE -48 304 -48 208
WIRE 16 304 -48 304
WIRE 128 304 128 288
WIRE 128 304 16 304
WIRE 400 304 400 272
WIRE 400 304 128 304
WIRE 512 304 400 304
WIRE 640 304 640 208
WIRE 640 304 576 304
WIRE 800 304 800 208
WIRE 800 304 640 304
WIRE 912 304 912 224
WIRE 912 304 800 304
WIRE 16 336 16 304
WIRE 400 448 400 304
WIRE 496 448 400 448
WIRE 640 448 640 304
WIRE 640 448 576 448
FLAG 16 336 0
FLAG 16 -224 0
FLAG 912 -496 va+
FLAG 912 -256 va-
FLAG 912 64 vb+
FLAG 912 304 vb-
SYMBOL voltage -48 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage 128 192 R0
WINDOW 3 -54 150 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 10p 10p {PER*PWM} {PER})
SYMBOL res 304 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL npn 336 176 R0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL cap 576 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1u
SYMBOL cap 576 288 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 1u
SYMBOL res 144 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL diode 656 208 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 688 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL cap 784 144 R0
SYMATTR InstName C3
SYMATTR Value 4u7
SYMBOL res 896 128 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 592 432 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 1G
SYMBOL voltage 128 -368 R0
WINDOW 3 -54 150 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 12 0 10p 10p {PER*PWM} {PER})
SYMBOL cap 576 -512 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 1u
SYMBOL cap 576 -272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 1u
SYMBOL diode 656 -352 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL diode 688 -480 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL cap 784 -416 R0
SYMATTR InstName C6
SYMATTR Value 4u7
SYMBOL res 896 -432 R0
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL res 592 -128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1G
SYMBOL res 384 64 R0
SYMATTR InstName R6
SYMATTR Value 1k
TEXT -128 464 Left 2 !.params PER=200u PWM=0.2
TEXT -130 500 Left 2 !.tran 100m
TEXT -72 -160 Left 2 ;a: niederohmiger Treiber
TEXT -48 0 Left 2 ;b: hochohmiger Treiber