Purnendu Kumar
Quantum Electronics Engineer
Quantum electronics engineer and technical architect with 9+ years of experience in quantum communication systems, photonic hardware R&D, FPGA design, and precision timing circuits.
Centralized Clocking in FPGA/SoC Hardware Design: An Exercise in Optimization or a Single Point of Failure?
Comparative analysis of centralized clock hubs vs. distributed timing networks in FPGA/SoC designs—evaluating … Continue reading
WaveDrom: Digital Timing Diagrams with Markdown
Create professional digital timing diagrams and state charts using simple text syntax without special software. Continue reading
Building Safe and Concurrent Memory-Mapped Register Access in Rust: The mmreg Journey
Memory-mapped I/O on embedded Linux traditionally requires unsafe pointer arithmetic, manual mmap calculations, and … Continue reading
Color Targets for Imaging and Display Devices
Color profiling tools and targets for photographers and engineers ensuring accurate color reproduction. Continue reading
DIY Two-Channel 120W DC Power Supply
Build a custom dual-channel 12V AC-DC power supply with 120W capacity for projects and tools. Continue reading
Decoupling - Path to power integrity
Decoupling strategies for power integrity covering transient current suppression and multi-frequency design. Continue reading
Engineered to Doom - Red Flags for PCB Design
Identify critical PCB design mistakes: clock selection, signal routing, and grounding pitfalls. Continue reading
Strategy for component placement
PCB component placement strategies considering mechanical, manufacturing, and circuit design constraints. Continue reading
Selecting a PCB stack-up for EMC compliance
EMC-optimized PCB stack-up selection considering signal routing, frequency, and emission requirements. Continue reading
15 PCB Layout guidelines to achieve EMC requirements
EMC compliance guidelines for PCB layout covering signal integrity, grounding, and radiation management. Continue reading
Checklist for error-free optimized PCB layout
Comprehensive PCB layout checklist covering footprints, placement, routing, and verification steps. Continue reading
4 Steps to Review the PCB Layout
A comprehensive PCB layout review process covering data collection, placement verification, routing analysis, and … Continue reading
Board bring up: Giving life to the design
Complete board bring-up process covering assembly verification, testing, debugging, and validation steps. Continue reading
100 Point Checklist for Schematic Design
Comprehensive 100-point schematic design checklist covering design rules, components, and verification steps. Continue reading
6 Steps of Verification for Error-free Schematic
Systematic schematic verification covering requirements, datasheets, power, components, signals, and final checks. Continue reading
Memristor Development - A Chronological Perspective
Timeline of memristor development from theoretical concept to practical implementation from 1960-2009. Continue reading
Memristor - A Brief Overview of Missing Basic Element
Overview of memristors: fundamental circuit elements with non-volatile memory and resistance-switching properties. Continue reading
Git Introduction: Understanding Version Control Systems
Learn the fundamentals of Git, a modern distributed version control system. Explore Git terminology, workflows, and … Continue reading
Installing/Uninstalling Vivado 2017.4 in Ubuntu 16.04
Step-by-step guide to install Xilinx Vivado 2017.4 with dependencies in Ubuntu Linux. Continue reading
Generating and Configuring Xilinx FPGA with MCS
Generate memory configuration files for Xilinx FPGA non-volatile programming using MCS format. Continue reading
Introduction to Diode
Fundamentals of diodes: unidirectional current flow, rectification, and applications in electronic circuits. Continue reading
Why devmem2 is a Loaded Gun: Solving RCU Stalls with mmreg
Direct memory access with devmem2 can trigger unrecoverable hardware deadlocks on modern SoCs when accessing … Continue reading
Octave:1> Getting Started
Introduction to GNU Octave, its history, installation, and basic environment setup for numerical computing. Continue reading
Beyond the Blueprint: Why mmreg Needs a Hardware Pre-Flight
While mmreg prevents most system hangs by validating against the kernel's resource map, zombie hardware states—where the … Continue reading
Octave:1> Variables and Constants
Master variables, constants, data types, and naming conventions in GNU Octave environment. Continue reading
Octave:1> Expressions and operators
Learn expressions, operators, and assignment statements in GNU Octave programming language. Continue reading
Octave:1> Built-In Functions, Commands, and Package
Explore GNU Octave built-in functions organized by topic for mathematical and scientific computing. Continue reading
Octave:2> Vectors and Matrices Basics
Master vectors and matrices in GNU Octave with practical examples and n-dimensional array operations. Continue reading
Octave:2> Conditional Execution
Control program flow with if/else, loops, and switch statements in GNU Octave. Continue reading
Avalanche Breakdown: When Diodes Harness the Power of the Cascade
Understanding avalanche breakdown in diodes—from the physics of impact ionization to applications in surge protection, … Continue reading
Octave:2> Functions
Define and use custom functions in GNU Octave: MATLAB files, inline, and anonymous functions. Continue reading
Octave:2> Scripts and Algorithm
Create reusable Octave scripts and implement algorithms through sequential command execution. Continue reading
Octave:3> File Operations
Learn file operations in GNU Octave including saving/loading workspace and data import/export. Continue reading
Octave:3> Data Visualization
Create professional data visualizations using Octave plots, graphs, charts, and figure windows. Continue reading