# Digital Circuit Tutorial and Overview

Digital Circuit Tutorial and Overview.

In this Digital Circuit Tutorial I will present an Overview with Definition, Examples, Types of Digital Circuits. I am sure you will find this Tutorial Helpful.

## Definition of Digital Circuit

A digital circuit is a, electric circuit where the signal is either of the two discrete levels – ON / OFF or 0 / 1 or True / False.

Transistors are used to create logic gates perform Boolean logic.

Software like Electronic Design Automation (EDA / ECDA) are used to design digital circuits. Both Paid and Free EDA Software are available online for Download.

## How Digital Circuit Works?

In digital electronic circuits, electric signals take on discrete values, which are not dependent upon time, to represent logical and numeric values. These values represent the information that is being processed.

The transistor is one of the primary electronic components used in discrete circuits, and combinations of these can be used to create logic gates. These logic gates may then be used in combination to create a desired output from an input.

Larger circuits may contain several complex components, such as FPGAs (*Field-programmable gate array*) or Microprocessors. These along with several other components may be interconnected to create a large circuit that operates on large amount of data.

## Types of Digital Circuit

For ease of designing and understanding, Digital Circuits are divided into following 2 Types:

### 1. Combinational Circuits

A Circuit that gives the same output when given the same inputs. It is represents a set of logic functions.

**Examples**: Multiplexers, De-multiplexers, Encoders, Decoders, Full and Half Adders etc.

### 2. Sequential Circuits

A sequential circuit is a combinational circuit with some of the outputs fed back as inputs. These circuits perform a sequence of operations.

**Examples**: Shift Registers, Counter, Flip-Flop

**PS**: Both Combinational Circuits and Sequential Circuits can further be classified into smaller types. But for ease of understanding I am not mentioning them here or things will get confusing.

## Examples of Electronic Equipment using Digital Circuit

- Wristwatches
- Calculators
- PDAs (
*Personal Digital Assistant*) - Microprocessors.

## Conclusion:

I hope this Digital Circuit Tutorial was helpful and clear. Do let me know via comments below.

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