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Exploring Output Ripple in a Negative Voltage Charge Pump Using LTspice

In this article, we’ll use LTspice simulations to more thoroughly understand output-voltage ripple and consider techniques for mitigating it within a charge pump circuit.

June 21, 2023 by Robert Keim

Analyzing Oscillator Frequency in an LTspice Negative Voltage Charge Pump

Continuing our in-depth look at a simple SPICE circuit that can generate a negative supply voltage, we’ll consider the effect of oscillator frequency on the system’s performance parameters.

June 18, 2023 by Robert Keim

Analyzing a Negative Voltage Charge Pump in LTspice—Source and Load Resistance

Learn about using LTspice simulations to provide important insight into the performance of a switched-capacitor voltage-inverting power supply.

May 14, 2023 by Robert Keim

Designing a Wideband Analog Voltage and Current Meter

Design a wideband analog multimeter to measure AC voltages and currents from 20 Hz to 1 MHz with a selectable sensitivity from 1 mV to 100 V, while the ammeter has a selectable current sensitivity of 10 mA to 10 A.

May 03, 2023 by John Woodgate

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.

April 21, 2023 by Dr. Steve Arar

Can Voltage Be Negative? Understanding Negative Voltage

In addition to explaining the nature of a negative voltage, this article briefly discusses how negative voltages are generated and why they are useful in circuit design.

April 02, 2023 by Robert Keim

Error Analysis in Analog-to-digital Converter (ADC) Applications

Through four different examples, learn about analog-to-digital converter (ADC) system error analysis.

January 20, 2023 by Dr. Steve Arar

Piezoelectric Accelerometers: IEPE Sensors vs. Charge Output Sensors

Learn about integrated electronics piezoelectrics (IEPE) sensors, powering them, and how they compare to charge output (non-IEPE) systems.

June 26, 2022 by Dr. Steve Arar

PCB Layout Challenges—Improve Your Switched-mode Power Supply Designs

Switched-mode power supplies (SMPS) appear simple to route on your PCB, but are they? This article identifies two noise sources and simple fixes to improve your EMC performance.

June 02, 2022 by Adrian Gibbons

Understanding the Amplifier Offset Voltage and Output Swing in Resistive Current Sensing

How does an amplifier's input offset voltage impact the accuracy of a current sense resistor's measurement? And how does amplifier output swing affect your shunt resistor value? Learn this and more in this technical article.

August 22, 2021 by Dr. Steve Arar

Learn How Integrated Solutions Can Increase the Accuracy of Resistive Current Sensing

In this article, we’ll discuss why a discrete implementation cannot provide a high accuracy in resistive current sensing.

August 15, 2021 by Dr. Steve Arar

Resistive Current Sensing: Low-Side vs. High-Side Sensing

What's the difference between high-side and low-side resistive current sensing? This article explains the basics, as well as when each is the more appropriate design choice.

August 01, 2021 by Dr. Steve Arar

Assessing the Effect of Load Capacitance on the Frequency of a Quartz Crystal

Learn how the load capacitance mismatch can “pull” the crystal to oscillate at a different frequency and how we can circumvent this problem.

June 16, 2021 by Dr. Steve Arar

All About Seeing Your Projects: Optical and Digital Magnification

Smaller electronics call for more powerful inspection equipment. If you're building a collection of at-home lab equipment, these visual tools may help you see where you're going on minuscule boards.

February 14, 2021 by Mark Hughes

How to Use Decoupling Capacitor Placement to Reduce Harmonic Distortion

Learn how to reduce second harmonic distortion by following some guidelines for placing decoupling capacitors in your PCB layout.

February 12, 2021 by Dr. Steve Arar

A Low-Cost Method of Powering a Microcontroller

This article proposes a simple microcontroller power-supply circuit that is worth considering when you’re developing a (very) cost-sensitive system.

October 30, 2020 by Robert Keim

LTspice Performance Analysis of a Precision Current Pump

In this article, we will use simulations to assess important aspects of the performance of an op-amp-based current source.

October 20, 2020 by Robert Keim

How to Design a Precision Current Pump with Op-Amps

This article discusses a voltage-controlled current-source circuit that requires only two op-amps and a handful of resistors.

October 16, 2020 by Robert Keim

Using a Supervisory Circuit to Turn a Conventional SRAM into Fast Non-Volatile Memory

How can you build a fast non-volatile memory from a conventional SRAM? It turns out, you only need a back-up battery and some control circuitry.

August 21, 2020 by Dr. Steve Arar

Simulating SiC MOSFET Thermal and Switching Behavior in LTspice

In this article, we’ll set up a basic SiC switching circuit and perform some transient simulations.

March 17, 2020 by Robert Keim