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Introduction to the Directional Coupler for RF Applications

Introduction to the Directional Coupler for RF Applications

As part of a vector network analyzer (VNA), a directional coupler enables us to characterize a device’s performance by its S-parameters. Read this article to learn more about this important piece of equipment.


Basic Principles of the Push-Pull Class B Power Amplifier

Basic Principles of the Push-Pull Class B Power Amplifier

Learn how a push-pull Class B amplifier functions, how to calculate its efficiency, and how its performance compares to the inductively-loaded Class A design.


Small-Signal MOSFET Models for Analog IC Design

Small-Signal MOSFET Models for Analog IC Design

The small-signal characteristics of MOSFETs play an important role in analog IC design. In this article, we learn how to model MOS transistors' small-signal behaviors.


Introduction to the Class B Power Amplifier

Introduction to the Class B Power Amplifier

How does a Class B power amplifier work? What makes it more efficient than a Class A power amplifier? Learn the answers in this article.


A 1939 Audio Oscillator Caught Disney’s Eye—And Helped Launch HP

A 1939 Audio Oscillator Caught Disney’s Eye—And Helped Launch HP

75 years ago, one of the biggest electronics firms of the century got its start in a Palo Alto, California, garage—and it did so with the help of Mickey Mouse.


News Jan 01, 2024 by Duane Benson
Introduction to the Inductively-Loaded Class A Power Amplifier

Introduction to the Inductively-Loaded Class A Power Amplifier

Learn how an inductively-loaded common-emitter stage can function as a power amplifier.


Happy Holidays—It’s a People Business We’re In, and It Always Has Been

Happy Holidays—It’s a People Business We’re In, and It Always Has Been

On this Christmas day, let’s remember that this is a people business. Enjoy this round up of 2023 articles about people that performed extraordinary engineering work throughout history.


News Dec 25, 2023 by Jeff Child
Introduction to Class A Power Amplifiers: The Common-Emitter PA

Introduction to Class A Power Amplifiers: The Common-Emitter PA

RF amplifier design is a challenging task, involving trade-offs between linearity, efficiency, gain, and output power. Here, we examine how a common-emitter circuit can, or can't, function as a power amplifier.


Using the Available Power Gain to Design a Bilateral Low-Noise Amplifier

Using the Available Power Gain to Design a Bilateral Low-Noise Amplifier

Learn how the available power gain concept can help us solve the problem of designing a bilateral RF amplifier for a specified gain and noise figure.


P-DUKE RED40U and RCD10U DC/DC Converter | Tech Explainer

P-DUKE RED40U and RCD10U DC/DC Converter | Tech Explainer

P-Duke, an industry leader in power conversion solutions, meets this escalating demand for improved performance and dependability with their new RCD10U and RED40U ultra-wide input DC-to-DC converters.


Learn About Designing Unilateral Low-Noise Amplifiers

Learn About Designing Unilateral Low-Noise Amplifiers

In this article, we learn about noise parameters and use Smith charts to design a unilateral low-noise amplifier (LNA) for a specified gain.


‘Drone With Ears’ Uses MEMS Microphones to Hear Disaster Victims

‘Drone With Ears’ Uses MEMS Microphones to Hear Disaster Victims

You’ve heard of eye in the sky, but this new drone uses hearing to locate disaster victims.


News Dec 13, 2023 by Aaron Carman
Building a Circuit to Measure the Effect of Noise on Audio Signals

Building a Circuit to Measure the Effect of Noise on Audio Signals

This project will cover the design, construction, and testing of an analog filter meeting the ITU-R BS.468-4 specification, which aims to evaluate the disturbing effects of noise on audio broadcast signals.


Projects Dec 10, 2023 by John Woodgate
RF Amplifier Stability Factors and Stabilization Techniques

RF Amplifier Stability Factors and Stabilization Techniques

Learn ways to test an RF amplifier's stability, techniques to stabilize its operation, and how RF design software can help you do both.


Using the Operating Power Gain to Design a Bilateral RF Amplifier

Using the Operating Power Gain to Design a Bilateral RF Amplifier

For newbie RF designers, the field's variety of power gain definitions can cause confusion. This article explains how, why, and when to use the operating power gain definition in RF amplifier design.


Siglent Launches New Flagship Digital Storage Oscilloscope

Siglent Launches New Flagship Digital Storage Oscilloscope

The new SDS7000A oscilloscope line from Siglent brings two model, the SDS7404A and SDS7304A, as its top offerings, with 4 GHz and 3 GHz bandwidths.


News Nov 27, 2023 by Duane Benson
A Raspberry Pi Pico Controlled Frequency Shift Audio Oscillator:  A Radio Shack Classics Circuit Remix

A Raspberry Pi Pico Controlled Frequency Shift Audio Oscillator:  A Radio Shack Classics Circuit Remix

A PIR sensor detects objects to allow a Raspberry Pi Pico running MicroPython code to adjust the frequency of a Science Fair electronic oscillator circuit with audio output.


Projects Nov 26, 2023 by Don Wilcher
I’m Thankful for These 6 EE Online Resources on All About Circuits

I’m Thankful for These 6 EE Online Resources on All About Circuits

On Thanksgiving today, Jeff reflects on how electronics technology enables all our amazing devices, and shares six useful All About Circuits online resources to be thankful for.


News Nov 23, 2023 by Jeff Child
Adding Hysteresis to a Comparator Circuit: LTspice Lab

Adding Hysteresis to a Comparator Circuit: LTspice Lab

This article uses SPICE simulations to explain the functionality of hysteresis based on positive feedback in a comparator circuit.


Understanding Hysteresis in Electronic Components and Circuits

Understanding Hysteresis in Electronic Components and Circuits

Learn about the behavior and benefits of hysteresis in comparator circuits, magnetic components, and high-power devices.