Category: DHD

Digital Hardware Design

How to Implement a Priority Encoder in Verilog: Step-by-Step Guide

July 4, 2025December 13, 2025 vlsifacts No Comments

In digital design, efficiently managing multiple input signals and prioritizing them is crucial. This is where a priority encoder comes into play. Whether you’re designing interrupt controllers, multiplexers, or resource arbitration logic, understanding how to implement a priority encoder is essential. In this blog post, we’ll explore what a priority encoder is, why it’s important, and walk…

Digital Electronics, Verilog

Practical Use Cases of Bitwise Operators in Verilog: Essential Guide for Digital Designers

July 3, 2025December 13, 2025 vlsifacts No Comments

Bitwise operations are at the heart of digital hardware design, enabling precise control over individual bits within signals. Whether you’re designing simple logic circuits or complex processors, understanding how to perform bitwise operations in Verilog is essential. This blog post will guide you through the basics of bitwise operators, their syntax, and practical use cases…

Digital Electronics, Verilog

When and How to Use While Loops in Verilog: Best Practices and Testbench Examples

July 2, 2025December 13, 2025 vlsifacts No Comments

Loops are essential tools in Verilog for automating repetitive tasks, but not all loops are created equal when it comes to synthesizability and practical use. Among the various loop constructs, the while loop often raises questions because of its dynamic nature. In this blog post, we’ll explore the best use cases for the while loop in Verilog, why it’s…

Verilog

Understanding Different Types of Loops in Verilog: A Beginner’s Guide

July 2, 2025December 13, 2025 vlsifacts No Comments

Loops are fundamental constructs in programming and hardware description languages like Verilog. They help automate repetitive tasks, making your code cleaner, more efficient, and easier to maintain. Whether you are initializing arrays, generating repetitive hardware structures, or creating testbench stimuli, loops are indispensable. In this blog post, we’ll explore the different types of loops available…

Verilog

How to Implement a Finite State Machine (FSM) in Verilog: Practical Examples and Best Practices

July 1, 2025December 13, 2025 vlsifacts No Comments

Finite State Machines (FSMs) are fundamental building blocks in digital design, controlling everything from simple counters to complex communication protocols. If you’re learning Verilog or designing digital circuits, understanding how to implement FSMs efficiently is essential. In this blog post, we’ll walk through the core components of an FSM, provide a practical example of a…

Digital Electronics, Verilog

Understanding Reset Signals in Digital Design: Types, Pros & Cons, and Best Practices

June 30, 2025December 13, 2025 vlsifacts No Comments

In digital design, the reset signal is one of the most fundamental control signals. It ensures that your digital circuits start in a known, stable state before normal operation begins. Whether you’re designing a simple flip-flop or a complex processor, understanding resets is crucial for reliable and predictable behavior. In this post, we’ll explore: Why Do We…

Digital Electronics, Verilog

Synthesis Constructs in Verilog: A Comprehensive Guide for Designers

June 30, 2025December 13, 2025 vlsifacts No Comments

Verilog is a powerful hardware description language widely used for designing digital circuits. However, writing Verilog code that can be successfully synthesized into hardware requires understanding the synthesis constructs – the subset of Verilog that synthesis tools can interpret and convert into physical gates and flip-flops. In this blog post, we’ll explore the essential synthesis constructs…

Verilog

Intermediate Verilog Questions for Designers (Part – 1) : Strengthen Your Coding and Design Skills

June 27, 2025December 13, 2025 vlsifacts No Comments

1. Model a tri-state buffer in Verilog. 2. Implement a 2-to-1 multiplexer in Verilog using a continuous assignment. 3. Model a combinational circuit using case? 4. How do you model a flip-flop in Verilog? A flip-flop is edge sensitive. The following code represents a positive-edge-triggered D flip-flop that stores the value of d at each rising clock edge. 5. How…

Interview, Question Bank, Verilog

Basic Verilog Questions for Beginners (Part – 3) : Build Your Foundations

June 25, 2025December 13, 2025 vlsifacts No Comments

1. Explain the concept of sensitivity lists in Verilog. A sensitivity list specifies the signals that trigger the execution of an always block when they change. Example: Here, the block executes whenever a or b changes. 2. What is the purpose of generate statements in Verilog? The generate statement is used to dynamically create repetitive hardware structures or conditional instantiations during elaboration. Example: 3. Discuss…

Interview, Question Bank, Verilog

Basic Verilog Questions for Beginners (Part – 2) : Build Your Foundations

June 24, 2025December 13, 2025 vlsifacts No Comments

1. Explain the difference between blocking and non-blocking assignments. Example: 2. What is the difference between posedge and negedge? Example: 3. What is the purpose of the assign statement? The assign statement is used for continuous assignments in combinational logic. It is used to drive values to wire data types. Example: 4. How do you declare a parameter in Verilog? A parameter is…

Interview, Question Bank, Verilog