LOGIC GATE TIMING DIAGRAM

And gate timing diagram

OR Gate Timing diagrams

Inverter Timing diagrams

The NAND Gate Timing diagrams

NAND Gate is a Universal Gate

The NOR Gate Timing diagrams

NOR Gate is a universal gate

The Exclusive-OR Gates Try the timing diagram!!!

The Exclusive-NOR Gates Try the timing diagram!!!

Boolean Algebra Mathematics of digital system Important in the analysis of logic circuit Boolean algebra defines 3 operations: addition, multiplication, and complementation. These correspond to the logic operations OR, AND and NOT respectively.

Boolean Addition and Multiplication The rules for Boolean Addition are: The rules for Boolean Multiplication are:

Commutative Law

Associative Law

Distributive Law

Digital IC What is IC? An integrated circuit (IC) is a silicon semiconductor crystal, called a chip, containing the electronic components for constructing digital gates. Various gates connected inside to form required ckt. Logic Gates are the basic building blocks of Digital Logics and Circuits. Digital ICs are often categorized according to the complexity of their circuits, as measured by the number of logic gates in a single package.

Digital IC packaging density

Positive and Negative logic

Positive and Negative logic

Digital ICs Digital ICs are classified not only by their complexity or logical operation, but also by the specific circuit technology to which they belong. The circuit technology is referred to as a digital logic family. Each logic family has its own basic electronic circuit upon which more complex digital circuits and components are developed. The basic circuit in each technology is a NAND, NOR, or inverter gate.

Digital IC Logic Family RTL : (Resistor-Transistor Logic) DTL : (Diode-Transistor Logic) TTL : (Transistor-Transistor Logic) ECL : (Emitter-Coupled Logic) MOS : (Metal-Oxide Semiconductor) CMOS : (Complementary MOS)

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