Version 4 SHEET 1 880 680 WIRE 48 160 16 160 WIRE 304 160 272 160 FLAG 16 160 A IOPIN 16 160 In FLAG 304 160 Y IOPIN 304 160 Out SYMBOL .\\positive_threshold_inverter 96 112 R0 SYMATTR InstName X1 SYMBOL .\\negative_threshold_inverter 208 112 R0 SYMATTR InstName X2