All About Circuits

Latest Communication Technical Articles

Categories

Evaluating the Noise Performance of Coherent DSB‑SC Demodulators

Evaluating the Noise Performance of Coherent DSB‑SC Demodulators

In this article, we'll learn how to calculate the noise power and signal-to-noise ratio (SNR) of a double-sideband suppressed-carrier communication system.


Introduction to Clock and Data Recovery

Introduction to Clock and Data Recovery

Learn how PLLs enable communication in which a clock signal is not transmitted with the data. We’ll look specifically at return-to-zero (RZ) and non-return-to-zero (NRZ) data formats.


Exploring the Relationship Between FM Wave Bandwidth and the Modulation Index

Exploring the Relationship Between FM Wave Bandwidth and the Modulation Index

In this article, we'll investigate how varying the amplitude and frequency of the modulating tone impacts the bandwidth of FM signals. We'll also compare the modulation index in AM and FM schemes.


Why Class D Amplifiers Need Anti-Parallel Diodes

Why Class D Amplifiers Need Anti-Parallel Diodes

Learn how anti-parallel diodes protect Class D amplifiers from the effects of reactive loads and inductive kickback.


What’s the Difference Between RS-232 and RS-485?

What’s the Difference Between RS-232 and RS-485?

Though both standards have long been used for serial communication, RS-485 offers valuable features that aren't available from RS-232. Learn more in this article.


Explore the Y Factor Method for Noise Figure Measurement

Explore the Y Factor Method for Noise Figure Measurement

Learn about measuring the noise figure (NF) using the Y factor method. We'll dive into using this to find the noise factor, how to calibrate for noise temperature, and much more.


Exploring the Basics of Bluetooth Low Energy: A Beginners Guide To BLE

Exploring the Basics of Bluetooth Low Energy: A Beginners Guide To BLE

Learn about the Bluetooth low energy (BLE) wireless communication protocol, namely its features, protocol stack, and how it communicates with devices.


RF Design Basics: VSWR, Return Loss, and Mismatch Loss

RF Design Basics: VSWR, Return Loss, and Mismatch Loss

Learn about voltage standing wave ratio (VSWR), return loss, and mismatch loss, which helps characterize the wave reflections in a radio frequency (RF) design.


Basics of Millimeter Wave Technology

Basics of Millimeter Wave Technology

What is millimeter wave technology and how is it characterized compared to other lower-frequency technologies?


Intro to 5G NR

Intro to 5G NR

Learn the basics of 5G NR (New Radio), including its frequency bands, applications, and what technologies make it possible.


Digital or Analog? How Should I and Q Combining and Separation Be Done?

Digital or Analog? How Should I and Q Combining and Separation Be Done?

How should I and Q combining be done? Through analog or digital means? This article will discuss the basics of the analog and digital IQ approaches.


The Four EV Charging Modes in the IEC 61851 Standard

The Four EV Charging Modes in the IEC 61851 Standard

In this article, we’ll look at different EV charging modes specified by the International Electrotechnical Commission (IEC).


Introduction to Ultra-Wideband (UWB) Technology

Introduction to Ultra-Wideband (UWB) Technology

Learn the basics of the ultra-wideband short-range wireless protocol, a technology that can be found in cutting-edge devices.


Introduction to the Terahertz Band

Introduction to the Terahertz Band

Learn about the terahertz band, its properties, and the applications where it's finding utility.


EV Charging Standards and Infrastructure

EV Charging Standards and Infrastructure

Learn more about EV charging connectors and standards in this overview.


Introduction to Electric Vehicle Battery Systems

Introduction to Electric Vehicle Battery Systems

Electric vehicle design is a complex concept. Here's a look at the heart of every EV: the battery.


Introduction to CAN (Controller Area Network)

Introduction to CAN (Controller Area Network)

This article introduces the Controller Area Network (CAN) serial communication bus, detailing message frames, bus arbitration, and signaling.


How to Design a Super Simple Sensor System for Industrial Monitoring Applications

How to Design a Super Simple Sensor System for Industrial Monitoring Applications

This article describes an Ethernet-connected subsystem of a larger modular sensor system designed for industrial or smart home sensing and monitoring. We will discuss a custom sensor subsystem developed for this application.


Projects Sep 12, 2018 by Mark Hughes
How Do Satellites Communicate with a GPS System? A Look at the GPS Antenna

How Do Satellites Communicate with a GPS System? A Look at the GPS Antenna

Antennas provide the wireless linkage required for any satellite-based system. Here's a look at the many antennas of GPS.


Hardware Evaluation of a Custom Programmable Wi-Fi Controller: The WiCard

Hardware Evaluation of a Custom Programmable Wi-Fi Controller: The WiCard

This article explores the schematic design and basic features of a smart programmable wireless controller module I designed: the WiCard.