Today's World is now-a-days completely dependent on Digital systems. To fulfill the need of Digital circuits has raised up to the maximum level. For this reason we the authors have designed this fundamental book for beginners to fulfill the basic needs of a graduate student. Digital IC design is a procedural process that involves converting specifications and features into digital blocks and then further into logic circuits. Many of the constraints associated with digital IC design come from the foundry process and technological limitations. Design skill and ingenuity are key at the higher level stages of digital IC design and the development of systems and processes that ensure a design meets specification as efficiently as possible. Moreover, Digital electronics deals with the electronic manipulation of numbers, or with the manipulation of varying quantities by means of numbers. Because it is convenient to do so, today's digital systems deal only with the numbers 'zero' and 'one', because they can be represented easily by 'off and 'on' within a circuit. Digital electronic circuits are usually made from large assemblies of logic gates, often packaged in integrated circuits. Complex devices may have simple electronic representations of Boolean logic functions.
