Version 4
SHEET 1 880 680
WIRE -64 192 -144 192
WIRE -64 224 -96 224
WIRE -32 144 -144 144
WIRE -32 176 -32 144
WIRE -32 256 -160 256
WIRE -32 256 -32 240
WIRE 64 208 0 208
WIRE 224 208 176 208
FLAG 224 208 Pwm
IOPIN 224 208 Out
FLAG -96 224 Pwmin
IOPIN -96 224 In
FLAG -144 192 Tri
IOPIN -144 192 In
FLAG -160 256 V-
IOPIN -160 256 In
FLAG -144 144 V+
IOPIN -144 144 In
SYMBOL Dig_Add\\CD4xxx\\CD40106B 112 160 R0
SYMATTR InstName U1
SYMATTR SpiceLine VDD=15  SPEED=.4  TRIPDT=5e-9
SYMATTR SpiceModel V+ V-
SYMBOL OPAMP5 -32 144 R0
WINDOW 0 -27 63 Left 0
WINDOW 38 83 100 Right 0
SYMATTR InstName U2
SYMATTR SpiceModel LF357
TEXT 48 168 Right 0 ;LF357