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{{projectinfo|Tutorial| Building a Three-Input Digital AND Function |b2TUT4_1.png|In this project, the basic concepts of digital circuit simulation in RF.Spice A/D are demonstrated, and a simple logic logical AND circuits are circuit is built and examined.|

In this tutorial you will use generic inverter gates and two-input NAND gates to build two-input and a three-input AND circuitscircuit. You will learn how to define digital inputs and outputs and use [[RF.Spice]]'s live digital timing diagrams. It is assumed that by this time you have already completed the first few analog tutorial lessons and are comfortable with navigating the [[RF.Spice A/D]] Workshop.