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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.


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.


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.


Analyzing a Current-Mode-Controlled Buck Converter in LTspice

Analyzing a Current-Mode-Controlled Buck Converter in LTspice

In this article, we use voltage waveforms to explore the electrical behavior of key subcircuits within a CMC buck converter.


Implementing a Current-Mode-Controlled Buck Converter in LTspice

Implementing a Current-Mode-Controlled Buck Converter in LTspice

In this article, we use LTspice to discuss the operation of the voltage error amplifier and PWM generator in a current-mode-controlled (CMC) step-down regulator.


An A-Weighted Analog Filter that Mimics the Response of the Human Ear

An A-Weighted Analog Filter that Mimics the Response of the Human Ear

In this project, we design an A-weighted analog noise filter for audio frequencies. The filter provides a variable frequency gain response that is similar to that of our hearing.


Projects Oct 29, 2023 by John Woodgate
Designing a Current-Mode-Controlled Buck Converter in LTspice

Designing a Current-Mode-Controlled Buck Converter in LTspice

In this article, we’ll learn about current-mode control (CMC) for switching regulators by examining the layout of an example circuit in LTspice.


Simulating Pulse-Frequency Modulation for DC-DC Converters

Simulating Pulse-Frequency Modulation for DC-DC Converters

Using a pulse-frequency-modulated buck converter as an example, this article describes techniques for incorporating PFM into switching regulator design and simulations.


Closed-Loop Control for an LTspice Switching Regulator

Closed-Loop Control for an LTspice Switching Regulator

Learn how to simulate a switching voltage regulator with a voltage-controlled PWM waveform in LTspice.


All About the Inverting Buck-Boost Converter

All About the Inverting Buck-Boost Converter

Learn about the inverting buck-boost converter, a switching voltage regulator designed to handle unstable input voltages.


Output Voltage and Diode Current in a Boost Converter

Output Voltage and Diode Current in a Boost Converter

Learn how output voltage and diode current affect the behavior of a step-up switching regulator.


Inductor Current in a Boost Converter: a SPICE Analysis

Inductor Current in a Boost Converter: a SPICE Analysis

With the help of LTspice, we examine how inductor current affects the functioning of a boost converter.


Understanding the Operation of a Boost Converter

Understanding the Operation of a Boost Converter

Learn how a step-up switching regulator generates an output voltage higher than its input voltage.


Introduction to the Boost Converter: Structure and Design

Introduction to the Boost Converter: Structure and Design

What is a boost converter? This article discusses key initial design tasks for a step-up voltage regulator and describes its structure.


Choosing the Right Type of Output Capacitor for a Switching Regulator

Choosing the Right Type of Output Capacitor for a Switching Regulator

Capacitors are a crucial component of step-down switching regulators. Learn about the different capacitor types and how each one affects regulator performance.


Selecting Inductors for Step-Down Switching Regulators, Continued

Selecting Inductors for Step-Down Switching Regulators, Continued

Are you picking out components for a step-down switching regulator? Learn how to think about inductance values and inductor current when choosing an inductor.


Choosing Inductor Values for Step-Down Switching Voltage Regulators

Choosing Inductor Values for Step-Down Switching Voltage Regulators

Proper inductor selection is one key to the successful design and implementation of a switching regulator. This article will help you understand the relationship between the inductor value and circuit performance.


LTspice Lab: Buck Converter Current and Voltage Dynamics

LTspice Lab: Buck Converter Current and Voltage Dynamics

Improve your understanding of switch-mode voltage regulators by examining the electrical characteristics of a step-down converter during the on and off portions of its switching cycle.


Understanding Switch-Mode Regulation: The Buck Converter

Understanding Switch-Mode Regulation: The Buck Converter

This article will analyze in detail the operation of a step-down DC/DC voltage converter. Using SPICE simulations, we will investigate the output voltage settling, voltage ripple, and inductor and load currents.