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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.


Understanding the Effect of Diode Reverse Recovery in Class D Amplifiers

Understanding the Effect of Diode Reverse Recovery in Class D Amplifiers

With the help of SPICE simulations, this article explores the impact of diode reverse recovery on Class D amplifier performance.


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.


Introduction to Switching-Mode Power Amplifiers: Class D Operation

Introduction to Switching-Mode Power Amplifiers: Class D Operation

In this article, we'll learn the basics of switching-mode RF amplifiers in general and Class D amplifiers in particular.


Understanding the Limitations of the Class C Power Amplifier

Understanding the Limitations of the Class C Power Amplifier

In this article, we explore the drawbacks of Class C operation through a performance comparison with Class A and Class B amplifiers.


Introduction to the Class C Power Amplifier

Introduction to the Class C Power Amplifier

This article examines the operation of the Class C power amplifier and how it compares to its Class A and Class B counterparts.


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.


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.


Using the Load-Pull Technique in RF Power Amplifier Design

Using the Load-Pull Technique in RF Power Amplifier Design

The output power and efficiency of a power amplifier (PA) are highly dependent on its load terminations. Learn how to characterize a PA's performance by analyzing load lines and estimating the load-pull contours of constant output power.


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.


Understanding Security Keys in Bluetooth Low Energy

Understanding Security Keys in Bluetooth Low Energy

Learn the roles of the three security keys in Bluetooth LE—Long Term Key (LTK), Connection Signature Resolving Key (CSRK), and Identity Resolving Key (IRK).


Whitening Filters Help Low-Power Radios Tackle Issues Caused by Long Identical Bit Sequences

Whitening Filters Help Low-Power Radios Tackle Issues Caused by Long Identical Bit Sequences

Learn how whitening filters solve problems in low-power radios when transmitting long identical bit sequences. Explore their significance in protocols like BLE and ZigBee.


Learn Stub Tuning With a Smith Chart

Learn Stub Tuning With a Smith Chart

Learn about impedance matching stub tuning using a Smith chart, as well as single and double stub tuning, impedance contour, and the "forbidden region" of a Smith chart.


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.


Characterizing Frequency Deviations of Quartz Crystals: Frequency Tolerance, Frequency Stability, and Aging

Characterizing Frequency Deviations of Quartz Crystals: Frequency Tolerance, Frequency Stability, and Aging

Learn about some of the most important characteristics of quartz crystal frequency deviations.


Assessing the Advantages of Ultra-wideband Systems Through Impulse Radios

Assessing the Advantages of Ultra-wideband Systems Through Impulse Radios

Using impulse radios as an example, we'll examine the advantages of ultra-wideband (UWB) technology compared to other short-range wireless communication technologies.


What Is the Power Spectrum of Quantization Noise?

What Is the Power Spectrum of Quantization Noise?

Our series on quantization noise begins with a clarification of the framework the author used to determine the scope of his investigation into quantization noise.


Modeling ADCs Using Intermodulation Polynomial and Effective Number of Bits

Modeling ADCs Using Intermodulation Polynomial and Effective Number of Bits

In this article, we discuss another methodology of how to model ADCs in system simulations, this time by using the effective number of bits and also adjusting our ADC by introducing a 5th order polynomial to the ideal quantizer input.


How Should Data Converters Be Modeled for System Simulations?

How Should Data Converters Be Modeled for System Simulations?

This article launches a series exploring the question of how to model data converters for system simulations.