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Digital System Design with VHDL & Verilog

Design & simulate digital circuits, FPGA & ASICs with Verilog and Very High Speed Integrated Circuit (VHSIC) Hardware Description Language (VHDL)
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VHDL refers to Very High-Speed Integration Circuit HDL (Hardware Description Language). It is an IEEE standard hardware description language to describe and simulate the behavior of sophisticated digital circuits. VHDL is one of the two languages used by education and business to design FPGAs and ASICs. The most popular examples of VHDL are Odd Parity Generator, Pulse Generator, Priority Encoder, Behavioral Model for 16 words, 8bit RAM, etc.


Key features of VHDL include:

1) Designing Digital Circuits: VHDL is widely used for designing digital circuits and systems, including microprocessors, FPGA (Field-Programmable Gate Array) designs, ASIC (Application-Specific Integrated Circuit) designs, and more. Learning VHDL enables you to specify the behavior and structure of these circuits.

2) Simulation and Verification: VHDL allows for simulation and verification of digital circuits before actual implementation. You can simulate your designs using tools like ModelSim or Xilinx ISE, enabling you to detect and correct errors early in the design process, thus saving time and resources.

3) Synthesis and Implementation: VHDL can be synthesized into hardware implementations for FPGA or ASIC devices. By learning VHDL, you can write synthesizable code that can be transformed into hardware configurations, allowing for efficient implementation of digital systems.

4) Custom IP Cores: VHDL is used to create custom Intellectual Property (IP) cores for reuse in different designs. By mastering VHDL, you can design and implement custom hardware blocks tailored to specific applications, which can significantly accelerate the development process.

5) Embedded Systems Development: VHDL is often used in the development of embedded systems, where hardware and software interact closely. Knowledge of VHDL allows embedded systems developers to understand and interface with custom hardware components effectively.

6) Signal Processing and Communication Systems: VHDL is used in the design of signal processing algorithms and communication systems. You can use VHDL to implement digital signal processing (DSP) algorithms, modulators, demodulators, error correction codes, and more.


Verilog is a hardware description language (HDL) that is used to describe electrical circuits and systems. It's utilised for hardware simulation as well as synthesis. The most common Verilog examples are a network switch, a microprocessor, a memory, and a basic flip-flop, among others. VHDL (Very High-Speed Integration Circuit HDL) is an acronym for Very High-Speed Integration Circuit HDL (Hardware Description Language). It is a standard hardware description language developed by the IEEE for describing and simulating the behaviour of complicated digital circuits. VHDL is one of two languages used to create FPGAs and ASICs in academia and industry.


Uplatz provides this end-to-end course on Digital System Design with VHDL & Verilog.

This course covers the primary System Verilog advancements to the Verilog hardware description language (HDL), analyses the advantages of the new capabilities, and shows how employing System Verilog techniques may make design and verification more efficient and effective. The course is divided into two sections: The Design module looks at RTL design and synthesis improvements, while the Verification module looks at verification advancements such object-oriented design, assertions, and randomization.


This VHDL & Verilog course also covers FPGA programming in both Verilog and VHDL, the two most widely used hardware description languages. You'll improve your marketable electronic design abilities and learn how to use FPGA programming principles and techniques to their maximum potential. Using Verilog and VHDL provides a strong foundation that allows you to completely comprehend the main ideas. Throughout the course, real-world examples, complete projects, and ready-to-run Verilog and VHDL code are supplied.

Course/Topic - Digital System Design with VHDL & Verilog - all lectures

  • In this lecture session we learn about Design For Testability (or Design for Test, or DFT) refers to design techniques that make products easier to test. Examples include the addition of test points, parametric measurement devices, self-test diagnostics, test modes, and scan design.

    • 30:56
  • In this tutorial we learn about A fault simulator evaluating how a digital circuit will behave in the presence of manufacturing defects. It was a necessary tool for grading the goodness of a vector set when chips were tested by feeding functional patterns into them and looking to see that the chip produced known good results.

    • 27:45
  • In this lecture session we learn about Iddq testing is a method for testing CMOS integrated circuits for the presence of manufacturing faults. It relies on measuring the supply current (Idd) in the quiescent state (when the circuit is not switching and inputs are held at static values).

    • 15:06
  • In this tutorial we learn about Timing Verification consists of validating the path delays (primary input or storage element to primary output or storage element) to be sure they are not too long or too short and checking the clock pulses to be sure they are not too wide or too narrow.

    • 19:09
  • In this lecture session we learn about A boundary scan is a testing standard which helps in defining the architecture and the techniques for solving hardware issues related to components such as printed circuit boards (PCBs) and integrated circuits. Traditional in-circuit testers are not well suited to testing highly complex and dense PCBs.

    • 30:00
  • In this lecture session we learn that VHDL can be used for designing hardware and for creating test entities to verify the behavior of that hardware. VHDL is used as a design entry format by a variety of EDA

    • 35:56
  • In this lecture session we learn about VHDL (which stands for VHSIC Hardware Description Language) was developed in the early 1980s as a spin-off of a high-speed integrated circuit research project funded by the U.S. Department of Defense.

    • 26:10
  • In this tutorial we learn about VHDL is one of the commonly used Hardware Description Languages (HDL) in digital circuit design. VHDL stands for VHSIC Hardware Description Language. In turn, VHSIC stands for Very-High-Speed Integrated Circuit. VHDL was initiated by the US Department of Defense around 1981.

    • 28:29
  • In this lecture session we learn about Sequential designs are developmental research designs that include elements of both cross-sectional and longitudinal studies; they are configured in ways to address confounds between age, cohort, and time of measurement.

    • 19:04
  • In this tutorial we learn about a state machine is any device that stores the status of something at a given time and can operate on input to change the status and/or cause an action or output to take place for any given change.

    • 21:58
  • In this lecture session we learn about Sometimes certain properties of sequential circuits may be used to reduce the number of gates and flip-flops during the design. STATE REDUCTION & ASSIGNMENT.

    • 13:26
  • In this tutorial we learn about The reduction of the number of flip-flops in a sequential circuit is referred to as the state reduction problem. State-reduction algorithms are concerned with procedures for reducing the number of states in a state table, while keeping the external input-output requirements unchanged.

    • 20:56
  • In this lecture session we learn about In digital circuit design, register-transfer level (RTL) is a design abstraction which models a synchronous digital circuit in terms of the flow of digital signals (data) between hardware registers, and the logical operations performed on those signals.

    • 31:49
  • In this tutorial we learn about Verilog is an HDL used to model electronic systems while VHDL is an HDL used in electronic design automation to describe digital and mixed-signal systems such as field programmable gate arrays and integrated circuits.

    • 37:15
  • In this lecture session we learn about Verilog HDL for designing hardware and for creating test entities to verify the behavior of a piece of hardware. Verilog HDL is used as an entry format by a variety.

    • 31:02
  • In this tutorial we learn about Verilog, just like VHDL, is meant to describe hardware. Instead, programming languages such as C or C++ provide a high level description of software programs, that is, a series of instructions that a microprocessor executes.

    • 30:55
  • In this lecture session we learn about SystemVerilog is a hardware description and verification language extended from Verilog and C++, and is based extensively on Object Oriented Programming techniques. UVM (Universal Verification Methodology) is a verification methodology standardized for Integrated Circuit (IC) Designs.

    • 31:34
  • In this lecture session we learn about SystemVerilog is the most preferred language for the IP & Sub-system verification that demands constrained random verification. Also, it's an IEEE standard Hardware Design and Verification Language [HDVL] which can be used for both the RTL design and verification.

    • 26:17
  • In this lecture session we learn about Designers of electronic hardware describe the behavior and structure of system and circuit designs using hardware description languages (HDLs)—specialized programming languages commonly known as VHDL, Verilog, and SystemVerilog.

    • 23:13
  • In this lecture session we learn about A testbench is an HDL module that is used to test another module, called the device under test (DUT). The testbench contains statements to apply inputs to the DUT and, ideally, to check that the correct outputs are produced.

    • 11:07
  • In this lecture session we learn that FPGA enables you to program product features, adapt to new standards, and reconfigure hardware for specific applications even after the product has been installed in the field — hence the term 'field-programmable'.

    • 31:48
  • In this tutorial we learn that FPGAs are particularly useful for prototyping application-specific integrated circuits (ASICs) or processors. An FPGA can be reprogrammed until the ASIC or processor design is final and bug-free and the actual manufacturing of the final ASIC begins. Intel itself uses FPGAs to prototype new chips.

    • 16:53
  • In this lecture session we learn about An FPGA (Field Programmable Gate Arrays) is a programmable chip used in various industry applications such as 4G/5G Wireless systems, Signal Processing Systems, and Image Processing Systems. FPGAs are also used as accelerators for CPU, prototyping of ASIC designs and in Emulation.

    • 36:05
Course Objectives Back to Top

·     Understand and apply SystemVerilog RTL design and synthesis features, such as new data types, literals, procedural blocks, statements, and operators, as well as relaxation of Verilog language rules, synthesis bug fixes, task and function enhancements, new hierarchy and connectivity features, and interfaces.

·   Learn how to use SystemVerilog verification capabilities such as classes, limited random stimuli, coverage, strings, queues, and dynamic arrays, and how to appreciate and apply them for more effective and efficient verification

·     Learn how to use the design process to implement a digital design on an FPGA

·       Learn how to use Altera ModelSim and Xilinx Isim to model a design

·       Learn how to programme FPGAs with the Xilinx ISE tool

·       ModelSim is used to debug a VHDL design

·       ModelSim may be used to simulate a VHDL design

·       Become familiar with Altera and Xilinx tools

·       FPGA programming

Course Syllabus Back to Top
  1. Design for Testability

  2. Fault Simulation

  3. Test Vector Generation and IDDQ

  4. Timing Verification

  5. Boundary Scan

  6. VHDL

  7. Sequential Design

  8. State Machines

  9. State Reduction & Assignment

  10. State Machine Design & Analysis

  11. RTL Systems & RTL Design

  12. Verilog

  13. SystemVerilog

  14. Test Benches

  15. Introduction to FPGA

  16. FPGA Testing

  17. FPGA Design Flows & Design Tools

Certification Back to Top

The Digital System Design with VHDL & VerilogCertification ensures you know planning, production and measurement techniques needed to stand out from the competition.

Verilog and VHDL are two Hardware Description Languages (HDL) that help to describe digital electronic systems. The main difference between Verilog and VHDL is that Verilog is based on C language while VHDL is based on Ada and Pascal languages.

VHDL can be used for designing hardware and for creating test entities to verify the behavior of that hardware. VHDL is used as a design entry format by a variety of EDA tools, including synthesis tools such as Quartus® Prime Integrated Synthesis, simulation tools, and formal verification tools.

HDL simulators are software packages that simulate expressions written in one of the hardware description languages, such as VHDL, Verilog, SystemVerilog. This page is intended to list current and historical HDL simulators, accelerators, emulators, etc.

VHDL is stricter typed than Verilog. That means in practice that programming in VHDL leads to more compiler errors, while programming in Verilog leads to more runtime errors. Both languages are equally good.

Uplatz online training guarantees the participants to successfully go through the Digital System Design with VHDL & Verilog Certification provided by Uplatz. Uplatz provides appropriate teaching and expertise training to equip the participants for implementing the learnt concepts in an organization.

Course Completion Certificate will be awarded by Uplatz upon successful completion of the Digital System Design with VHDL & Verilog online course.

Career & Jobs Back to Top

The Digital System Design with VHDL & Verilog draws an average salary of $121,000 per year depending on their knowledge and hands-on experience.

Verilog is used to model electronic systems and circuits like microprocessors and flip-flops whereas VHDL is used to describe digital and mixed signals like integrated circuits.

Verilog is a Hardware Description Language; a textual format for describing electronic circuits and systems. Applied to electronic design, Verilog is intended to be used for verification through simulation, for timing analysis, for test analysis (testability analysis and fault grading) and for logic synthesis.

Note that salaries are generally higher at large companies rather than small ones. Your salary will also differ based on the market you work in.

Digital Design Synthesis/STA M/F.

Lead Member Technical Staff.

RTL Design.

Verification Engineers.


Interview Questions Back to Top

1) What is Verilog?

Verilog is a Hardware Description Language (HDL) used for describing a digital system such as a network switch, a microprocessor, a memory, or a flip-flop. Verilog is mainly used to verify analog circuits, mixed-signal circuits, and the design of genetic circuits. It is also used in the design and verification of digital circuits at the register-transfer level of abstraction.

Verilog supports a design mainly at the following three levels of abstraction:

o   Behavioral level

o   Register-transfer level

o   Gate level


2) Who is the founder of the Verilog programming language?

Verilog was introduced by Prabhu Goel, Phil Moorby, Chi-Lai Huang, and Douglas Warmke between late 1983 and early 1984.


3) What is VHDL? / What is the full form of VHDL in VLSI?

VHDL is an acronym that stands for Very high-speed integrated circuit Hardware Description Language. It is a programming language used to describe circuits in digital systems and model the digital system by using dataflow, behavioral and structural style of modeling.

4) What are the different variants of the VHDL?

VHDL is defined by IEEE standards and has mainly two common variants:

o   VHDL-1987

o   VHDL-1993


5) What are the main usages of VHDL?

Following are the main usages of VHDL:

o   VHDL is hardware describing language used to describe the behavior of electronic circuits, most commonly digital circuits.

o   It is mainly used to design hardware and create test entities to verify the behavior of that hardware.

o   It is used as a design entry format by various EDA tools, such as synthesis tools, simulation tools, and formal verification tools.


6) Are Verilog and VHDL the same?

Verilog and VHDL are not identical. They are different, and the main difference between Verilog and VHDL is that Verilog is based on C language while VHDL is based on Ada and Pascal languages.


7) What is the difference between Verilog and VHDL?

Difference between Verilog and VHDL:

Although both Verilog and VHDL are Hardware Description Languages (HDL) used to describe digital system hardware such as microprocessors and flip-flops. These languages are different from common programming languages. Let's compare them to see the main differences between them:



Verilog is a kind of Hardware Description Languages (HDL) that is used to model electronic systems.

VHDL is a kind of Hardware Description Languages (HDL) used in electronic design automation to describe digital and mixed-signal systems such as field-programmable gate arrays and integrated circuits.

Verilog is a newer language than VHDL, as it was introduced in 1984.

VHDL is an older Hardware Description Languages as compared to Verilog as it was introduced in 1980.

Verilog is based on the C language.

VHDL is based on Ada and Pascal languages.

Verilog is a case-sensitive language.

VHDL is not a case-sensitive language.

Verilog is a simple and easy-to-learn language.

VHDL is complex in comparison to the Verilog language.

Verilog mainly focuses on hardware modeling but has a lower level of programming constructs. So, it is not as verbose as VHDL.

VHDL is a rich and strongly typed language. It is deterministic and more verbose than Verilog.

Verilog is more compact than VHDL.

In VHDL, you have to write more lines of code.

Verilog is weakly typed and deterministic. All data types are predefined in Verilog, and each has a bit-level representation.

VHDL is self-documenting and often catches errors missed by Verilog. It focuses on unambiguous semantics and also allows portability between tools.


8) What are HDL simulators?

HDL simulators are software packages that are used to simulate expressions written in one of the Hardware Description Languages, such as Verilog, VHDL, System Verilog.

9) What is the difference between blocking and non-blocking in Verilog?

There are two types of procedural assignment statements in Verilog known as blocking and non-blocking. You can identify them as they use different assignment operators represented by the symbols = and <=.

o   Blocking: The blocking assignment statement is very much similar to older programming languages. As the name suggests, it blocks the current process until it complete. It completes the entire statement at once before control moves on to the following statement.

o   Non-blocking: The non-blocking assignment statement or operator assesses all the right-hand sides for the current time unit and chooses the left-hand sides later after the time unit.

10) What do you understand by Verilog full case statements and Verilog parallel case statements?

There are two types of case statements in Verilog.

o   Verilog full case statements

o   Verilog parallel case statements

Verilog full case statements

The Verilog full case statements are statements in which binary patterns of every potential case expression can match either a case item or default. If your considered case statement does not involve a case default and is likely to discover a binary case expression that does not match any of the defined case items, the case statement would not be considered full.

Verilog parallel case statements

A parallel case statement is a statement where it matches a case expression, just one case item. If you can find a case expression that would fit more than one case item, the matching case items are called 'overlapping case items,' and the case statement would be not parallel."

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