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Determining RF Choke Requirements for a Class E Power Amplifier

Determining RF Choke Requirements for a Class E Power Amplifier

In this article, we examine the effects of RF choke non-idealities on Class E amplifier performance and learn how to choose the right choke inductance for your amplifier design.


Introduction to Modulation Techniques in RF Systems

Introduction to Modulation Techniques in RF Systems

In this article, we discuss the basics of RF modulation and how it affects the performance of communication systems.


Using QSPICE to Understand and Tune an LED Blinker Circuit

Using QSPICE to Understand and Tune an LED Blinker Circuit

In this article, we examine the oscillation behavior of an LED blinker circuit in QSPICE and learn how to control its ON-time and pulse repetition frequency.


Introduction to SLiCAP for Analog Circuit Design

Introduction to SLiCAP for Analog Circuit Design

Learn how to design and verify analog circuits using SLiCAP, a Python-based symbolic simulator program.


Transferring SPICE Models From LTspice to QSPICE

Transferring SPICE Models From LTspice to QSPICE

In this article, we'll walk through the process of importing SPICE models into QSPICE and demonstrate the basics of using the QSPICE waveform viewer, including measurement markers.


Understanding Switching Losses in Class E Amplifiers

Understanding Switching Losses in Class E Amplifiers

In this article, we examine how non-zero switch transition times impact the efficiency of a Class E power amplifier.


Transferring LTspice Schematics to QSPICE

Transferring LTspice Schematics to QSPICE

In this article, we'll walk through the process of moving an LTspice circuit into QSPICE and learn some QSPICE schematic techniques.


Harmonic Suppression in Low-Q Class E Amplifiers

Harmonic Suppression in Low-Q Class E Amplifiers

In this article, we examine the filtering requirements of Class E power amplifiers with less-than-ideal Q-factors.


Introduction to QSPICE for LTspice Users

Introduction to QSPICE for LTspice Users

This article, the first in a four-part series on moving from LTspice to QSPICE, introduces an LED blinker circuit that we’ll simulate with both programs.


Unraveling the Design Equations of the Class E Power Amplifier

Unraveling the Design Equations of the Class E Power Amplifier

In this article, we analyze the operation of the Class E amplifier and examine the underlying assumptions of its design equations.


Upgrading My Retro Handheld Gaming Console with Motion Control and an LCD

Upgrading My Retro Handheld Gaming Console with Motion Control and an LCD

Follow my upgrade of a handheld game controller as I add a new 1.8-inch color LCD for animated graphics and an accelerometer module for motion control input.


Load Network Response and Design Equations for the Class E Power Amplifier

Load Network Response and Design Equations for the Class E Power Amplifier

Designing a Class E RF amplifier? Learn how to choose the correct level of damping and calculate the optimum component values for your circuit.


Class E Power Amplifiers: Waveform Engineering for Superior Performance

Class E Power Amplifiers: Waveform Engineering for Superior Performance

Class E RF amplifiers are designed to produce switch waveforms with a specific set of characteristics. In this article, we discuss the advantages and limitations of these waveforms.


Introduction to the Class E Power Amplifier

Introduction to the Class E Power Amplifier

Learn how Class E amplifiers improve on the efficiency of Class D amplifiers at RF frequencies.


Building a Resistor Color Code Calculator and Ohmmeter Using Arduino

Building a Resistor Color Code Calculator and Ohmmeter Using Arduino

For this project, I built a handheld resistor color code calculator and ohmmeter using the ATmega328 microcontroller and a 1.8-inch color LCD display.


Understanding the Transformer-Coupled Current-Switching Class D Amplifier

Understanding the Transformer-Coupled Current-Switching Class D Amplifier

In this article, we’ll learn about the transformer-coupled current-switching Class D amplifier. Once we understand its operation, we'll compare its performance with two voltage-switching Class D configurations.


A Cortex-M Microcontroller-Enabled Electronic Timer: A Radio Shack Remix

A Cortex-M Microcontroller-Enabled Electronic Timer: A Radio Shack Remix

In this Radio Shack Classic Circuits Remix, we add modern microcontroller functionality to the vintage Electronic Timer project for the Science Fair 65-in-1 kit.


Projects Sep 15, 2024 by Don Wilcher
Understanding the Transformer-Coupled Voltage-Switching Class D Amplifier

Understanding the Transformer-Coupled Voltage-Switching Class D Amplifier

In this article, we'll learn how the transformer-coupled voltage-switching Class D amplifier works and highlight some of its advantages.


Broadcasting Custom Advertising Data on the nRF52 DK: A Bluetooth LE Tutorial

Broadcasting Custom Advertising Data on the nRF52 DK: A Bluetooth LE Tutorial

Learn how to turn an nRF52 development kit into a Bluetooth Low Energy beacon that broadcasts either static or dynamic custom data.


Understanding Class D Amplifier Non-Idealities: Reactive Loads and Parasitic Capacitances

Understanding Class D Amplifier Non-Idealities: Reactive Loads and Parasitic Capacitances

In this article, we'll learn about two important non-idealities of Class D power amplifiers and how they affect performance.