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Describe the action of logic gates. • AND, OR, NAND, NOR, NOT, XOR and XNOR • Using Boolean expressions. • Using truth tables. Understand the use of universal gates. • NAND • NOR containing standard logic gates.
Logic gates and truth tables Implementing logic functions Canonical forms Sum-of-products ... Example: Binary full adder 1-bit binary adder Inputs: A, B, Carry-in Outputs: Sum, Carry-out A B Cin Cout Sum Adder ... Many ways to map expressions to gates Example: ...
Schematic: A drawing of interconnected gates! Net: Wires at the same voltage (electrically connected)! Netlist: A list of all the devices and connections in a schematic ! Fan-in: The # of inputs to a gate! Fan-out: The # of loads the gate drives CSE370, Lecture 45! Example: F = (AŁB)™ + CŁD! Example: F = CŁ(A+B)™ Mapping Boolean ...
Digital Electronics Fundamental Logic Gates Truth Table Circuit Representation Boolean Expression A B Q A B Q 0 0 0 0 1 0 1 0
Lecture 11 - Logic gates and Boolean. The basic logic gates are the inverter (or NOT gate), the AND gate, the OR gate and the exclusive-OR gate (XOR). If you put an inverter in front of the AND gate, you get the NAND gate etc. One of the common tool in specifying a gate function is the truth table. All possible combination of the inputs A, B ...
Building Functions: Logic Gates • NOT: • AND: • OR: • Logic Gates digital circuit that either allows a signal to pass through it or not. Used to build logic functions There are seven basic logic gates: AND, OR, NOT,
• The basic elements of digital circuits are logic gates • Logic gates – ideally have signals of two levels: high and low – perform logic functions , such as NOT, AND, OR, NAND, NOR • Logic gates can be represented by symbols and their functions can be described using truth tables or logic expressions . S2, 2008 COMP9032 3 NOT, AND ...
