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SPICE: Certainty for All Decisions
Design, validate, and verify the most advanced schematics.
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Simulation / Analysis for PCB Design
How to Get 3-port S-parameters From a 2-port VNA Measurement
S-parameters are fundamental quantities in signal integrity, and an ability to understand them from measurement or analysis is very important. If you have a 3-port network, like a power divider or circulator, it may appear that you must use a 3-port VNA to measure these S-parameters. It is always acceptable to measure between two ports, but you need to know what exactly it is you are measuring. As it turns out, you can use a 2-port VNA
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Altium Designer: The Best Circuit Design Software
Altium Designer doesn't just include the best PCB layout tools, it is also a the best circuit design software for students, hobbyists, and professionals.
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Monte Carlo Simulation vs. Sensitivity Analysis: What’s the Difference?
SPICE gives you an alternative to Monte Carlo analysis so that you can understand circuit sensitivity to variations in parameters.
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Identifying Near-field EMI in a PCB's Power Distribution Network
Near-field EMI on the PDN in a PCB can be identified when you use a 3D field solver to examine your PCB layout. Here’s how Ansys SIwave integrates with Altium Designer for a powerful simulation workflow.
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Power Integrity and Simulations with Heidi Barnes
What a very insightful discussion with Heidi Barnes of Keysight. In this episode, we will discuss all things simulations and power integrity in detail. We will dive into EM simulations, capacitor placement, Z, Y, and S parameters correlation measurements, and more!
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The Basics of Monte Carlo in SPICE: Theory and Demo
Anytime you place a component in your PCB, it’s almost like you’re gambling. All components have tolerances, and some of these are very precise (resistors for instance), but others components can have very wide tolerances on their nominal values (e.g., wirewound inductors or ferrites). In the event the tolerances on these components become too large, how can you predict how these tolerances will affect your circuits? While you could calculate
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Ebook: PDN Simulation and Analysis Guide
In this e-book, we’ll show how to create some fundamental PDN simulation models with SPICE, and how to analyze PDN impedance with industry-standard simulation programs.
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Ferrite Bead Models and Transfer Impedance in a PDN Simulation
Ferrites in a PDN and transfer impedance are investigated in this article. We’ll show how ferrites in a PDN create problems for switching circuits.
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PDN Impedance Simulation and Analysis in SPICE
PDN simulations can be performed in SPICE if you know how to properly model parasitics and inductive effects in power integrity analysis.
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When Do PCB Power Plane Resonances Occur?
Do you know when a power plane resonance occurs in the PDN on a circuit board? We’ll examine when this occurs and what causes it.
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How To: Impedance Matching and Terminating Capacitive Loads
Impedance matching and capacitive load termination are examined in this article.
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How the Gibbs Phenomenon Produces Measurement Artifacts
The Gibbs phenomenon is a measurement artifact that can be mistaken for real signal integrity problems like ground bounce, ringing from reflections, or resonance on short lines.
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PWM in Power Supply Design
PWM signals are used to control average power delivery in switching regulator circuits.
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Controlled ESR Capacitors: Should You Use Them for Power Integrity?
I can’t think of a single product I’ve built that doesn’t require capacitors. We often talk a lot about effective series inductance (ESL) in capacitors and its effects on power integrity. What about effective series resistance (ESR)? Is there a technique you can use to determine the appropriate level of resistance, and can you use ESR to your advantage? Like many answers to important engineering questions, the answer is “it depends.” One type of
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Beginner's Guide to H-bridge Full Wave Rectifier Design
Need to start a new power conversion design? You’ll probably need an H-bridge full-wave rectifier to produce a stable DC output.
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What Causes Gibbs Signal Ringing in High-speed Channel Simulations?
Gibbs ringing is both a measurement artifact and a calculation artifact that arises in band-limited channels. Make sure you understand how this arises due to transform and convolution operations.
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Complete Power Supply Filter Design and Simulation Guide
A PCB for a power supply can be as difficult to design as high-speed networking equipment and complex embedded systems. These circuit board designs need to account for a range of behaviors and safety requirements, especially when dealing with high voltages and currents reaching the output of the power supply. In addition to safety standards involved in power supply PCBs, component selection is critical for ensuring the design can provide the
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