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NEW Non-Invasive Measurement Information

2-port Dembed with Picotest 2-Port Probe Video

This video shows how to measure low impedance components and voltage regulator impedance using the Bode 100 and the Picotest P2101A 2-Port Probe.


Designing Power for Sensitive Circuits

Low power, high performance circuits are often plagued by power supply related issues.  This common occurrence is frequently due to mythical (or misapplied) rules-of-thumb.  These rules of thumb often lead us in the wrong direction, making things worse rather than better.  In this article, I’ll highlight some of the most common mistakes engineers make and share some fundamental rules for designing clean power for sensitive circuits.  Applying these rules will result in higher performance, lower cost designs with fewer design iterations.

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The Unfortunate State of Power Integrity in Space Systems

IMG954677 (002)This video slideshow is from a recent presentation by Steve Sandler at the 2017 Space Power Workshop in Manhattan Beach, CA on April 27, 2017. The importance of power integrity cannot be underestimated.

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Top Three EMI and Power Integrity Problems with On-Board DC-DC Converters and LDO Regulators

Kenneth Wyatt
Wyatt Technical Services, LLC
Steve Sandler

Modern devices are continuing a long-term trend of squeezing more electronics into smaller packages, while also increasing system performance, data rates and operating efficiency. Higher efficiencies are often achieved by implementing faster silicon MOSFETs or even faster eGaN FETs while size is reduced by increasing switching frequencies and replacing aluminum and tantalum capacitors with smaller ceramic devices. One result of this trend is that there is greater interaction between the disciplines of EMI, signal integrity (SI) and power integrity (PI).

Click here to read the article. (registration is required)


Characterizing and Modeling Switch Mode Power Supplies (Mar 15)

Original air date: March 15, 2017

Johnnie Hancock
Oscilloscope Applications Manager
Keysight Technologies
Steven Sandler
Managing Director

Why this Webcast is Important:

Whether your power supply designs are based on switch mode or linear technology, there are many reasons why you should characterize the frequency response of your power supply designs. Two reasons are to better to understand the stability and noise immunity under various load change conditions based on an existing design. Another good reason is to gain the missing information required to create or improve a simulation model which can then be used to simulate operation under different design conditions, including worst-case tolerances.

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Mastering Power Integrity Web Cast

mastering-power-integrity-header-imageWhy this webcast is important
Power integrity is important to the entire system performance and consists of much more than power distribution noise. This webcast provides an understanding of power integrity, why it is important, how to design for it, and it teaches techniques for high-fidelity simulation, analysis and measurement. The goal is to enable you to better isolate, troubleshoot, and optimize power related issues.

Who should attend
PCB designers, VRM designers, signal integrity engineers, power integrity engineers and anyone involved in PDN design will receive an introduction to power integrity and the latest tips and techniques for flat impedance designs.

Registration is required.

Click here to go to the registration page.

Introduction to Power Integrity – Video


Steve Sandler of Picotest and Heidi Barnes of Keysight teach this short course on Power Integrity. This is part 1 (~90 min) as presented by Steve at EDI CON USA 2016.

Site registration is required to view this video.

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How to Design for Power Integrity: Measuring, Modeling, Simulating Capacitors and Inductors

The third video in the Picotest/Keysight How-To Design for Power Integrity series is now available.

Power supply switching ripple and control loop phase margin are dominated by the output inductor and the bulk capacitors. Simple RLC capacitor and inductor models can result in a design with more capacitors than necessary adding to the design cost, consuming valuable circuit board real estate and degrading the control loop performance. Most capacitor datasheets provide very limited information, such as maximum ESR at 100kHz and not the desired information regarding typical values and frequency dependencies of the C, ESR, and ESL.

This short video shows you how to make these measurements efficiently and how to use the results to create high fidelity models for simulation.

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Measuring Cable Resonance with a Comb Generator

usb-pico-v4-croppedArticle by Kenneth Wyatt

Cables are one of the key metallic structures on a product that can act as an antenna and couple energy, causing radiated emissions and possible compliance test failures. This has been discussed extensively in the literature on product design for EMI compliance. In many cases, they can resonate at their half-wave frequency and actually amplify any harmonic currents traveling along the cable shield near that resonance (or higher-order resonances). Very often, you’ll observe several broad resonant peaks in the emissions profile of a product under test.

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Capacitors and Decoupling

sandler_cap-quiz_pt1q1Capacitors are never 100% capacitance. Their characteristics include resistance and inductance.

Capacitors are too often taken for granted. When it comes to high-speed circuits, capacitors can behave like resistors or even inductors, depending on the frequencies involved. When an IC needs power, decoupling capacitors can help provide it, but not always.

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