Digital Circuit Tutorial and Overview
Digital Circuit Tutorial and Overview.
In this Tutorial I will present an Overview of Digital Circuit 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.
FAQs: Digital Circuit
How do digital circuits work?
Digital circuits work by using logic gates, which are fundamental building blocks that perform logical operations. These gates process input signals and produce output signals based on predefined logic rules. Complex circuits are created by connecting these gates in various configurations.
What are flip-flops in digital circuits?
Flip-flops are bistable multivibrator circuits used to store a single binary bit of memory. They are the basis for sequential logic, storing information until it's changed by an external signal. Common types include D-type, JK, and T flip-flops, crucial for building memory elements in processors and registers.
What is a decoder in digital circuits?
A decoder is a combinational circuit that takes a binary input and activates one of several output lines, typically in response to a specific pattern in the input. It's often used to convert binary information into a more human-readable or usable format, like driving a display or selecting a specific device in memory.
How do digital circuits differ from analog circuits?
Digital circuits process discrete signals (binary) that represent data as 0s and 1s, while analog circuits deal with continuous signals representing a range of values.
Digital circuits are less susceptible to noise, easier to manipulate, and offer greater precision, making them suitable for computation and communication tasks, whereas analog circuits are used for tasks like amplification and signal processing.
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