Definition of digital circuit
- 1. Definition of Digital Circuit: A digital circuit is a circuit where the signal must be one of two discrete levels. Each level is interpreted as one of two different states (for example, on/off, 0/1, true/false). Digital circuits use transistors to create logic gates in order to perform Boolean logic. This logic is the foundation of digital electronics and computer processing. Digital circuits are less susceptible to noise or degradation in quality than analog circuits. It is also easier to perform error detection and correction with digital signals. To automate the process of designing digital circuits, engineers use electronic design automation (EDA) tools, a type of software that optimizes the logic in a digital circuit. 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.
- 2. 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. Synchronous Sequential Network Design (Mealy and Moore) is a method of designing complex sequential logic circuits that only look at inputs at times determined by a clock. This results in circuits with fewer glitches, more predictability but are slower and use more hardware. Asynchronous Sequential Network Design is a method of designing complex sequential logic circuits that are very fast, simple and respond to inputs at speeds determined by the devices themselves rather than a clock. They are harder to design but are closer to nature (including to brain operation) Examples of Electronic Equipment using Digital Circuit Wristwatches Calculators PDAs (Personal Digital Assistant) Microprocessors. For more information about basic digital circuits, there are 2 courses that are explained in detail through which you can have all the information related to this topic. The name of first course is Fundamentals of Digital Logic Design (Digital Electronic 1) A. Course Description: This course introduces the concepts of digital logic operations and design. The course teaches fundamentals of digital logic design through the use of a large number of design problems. Topics include: Boolean algebra, theory of logic functions; mapping techniques and function minimization; logic equivalent circuits and gate transformations; base conversion number notations and arithmetic; binary addition/subtraction, decoder, encoder, comparator, multiplexer and de-multiplexer circuits in combinational systems. B. Course Objectives: To introduce the binary number system. To teach the fundamentals of digital logic design. To teach logic equivalent circuits and conversion. To introduce the design of popular fundamental digital circuits.
- 3. C. Course Learning Outcomes: CO-1: Apply techniques to convert between the decimal, ASCII and binary sets as well as perform binary arithmetic CO-2: Describe combinational systems algebraically. CO-3: Apply logic arithmetic techniques to the reduction of combinational systems. CO-4: Design combinational logic systems to meet specified requirements. CO-5: Design introductory sequential systems through the application of system reduction techniques and the use of sequential system design tools. D. Topics Covered: 1. Arithmetic Functions. 2. Boolean algebra, and function minimization. 3. Combinational Logic circuits. 4. Combinational Logic design. 5. Digital systems. 6. Information representation. 7. Introductory sequential systems including counters . 8. Sequential circuits: design, implementation and minimization.
- 4. Link for this course: https://bit.ly/3GX2XLF There is a discount for this course that ends on 12/02/2021 to register before it ends: https://bit.ly/31skpY0 The name of second course is Learn VHDL, PLS's and FPGA (Digital Electronic 2) A. Course Description: This course gives a detailed study of modern digital design principles and techniques. Topics include: Programmable Logic Devices (PLDs) and Field Programmable Gate Array (FPGA) devices; Design and optimization of arithmetic circuits, and their programming using Hardware Description Language (e.g. VHDL); Timing Diagrams; Design of a Processor and VHDL simulation. B. Course Outcomes: A student who successfully fulfills the course requirements will have demonstrated an ability to: CO-1: Analyze Combinational and Sequential Circuits. CO-2: Develop VHDL programs for Combinational and Sequential Circuits. CO-3: Design of the Arithmetic Logic Unit. CO-4: Design of memory elements. C. Topics Covered: 1- Asynchronous Sequential design. 2- Combinational Circuit Design. 3- Memory Design.
- 5. 4- Number Representation and ALU design. 5- Processor Design. 6- Sequential Circuit Design. Link for this course: https://bit.ly/3nWqVhh There is a discount for this course that ends on 12/02/2021 to register before it ends: https://bit.ly/2Yc34kJ These 2 courses are complementary to each other and have everything about electronic circuit design. I recommend these 2 courses to everyone. I hope this Digital Circuit Tutorial was helpful and clear.