Stability

Sep 21, 20211 min read

Space Power Workshop 2021 - Power Integrity Challenges In the Space Industry, An Update

Learn about the current state of Power Integrity analysis and test in the Space industry from PI Guru Steve Sandler. This video discusses...

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Tektronix App Note: Measuring the Control Loop Response of a Power Supply Using an Oscilloscope

Picotest

Apr 27, 20212 min read

Tektronix App Note: Measuring the Control Loop Response of a Power Supply Using an Oscilloscope

Most power supplies and regulators are designed to maintain a constant voltage over a specified current range. They are essentially...

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Siglent App Note: Measuring Power Supply Control Loop Response with Bode Plot II

Picotest

Jun 28, 20191 min read

Siglent App Note: Measuring Power Supply Control Loop Response with Bode Plot II

In this application note, we will show you the basic principles for making this stability measurement and how to use these instruments to...

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Picotest

Jul 6, 20171 min read

Accurately measure ceramic capacitors by extending VNA range

Ceramic capacitors play an oversized role in circuit performance as a major contributor to voltage regulator control loop stability and...

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Introduction to NISM – Non-Invasive Stability Measurement with Steve Sandler

Picotest

Jun 20, 20171 min read

Introduction to NISM – Non-Invasive Stability Measurement with Steve Sandler

More information on this revolutionary measurement technology can be found here: https://www.picotest.com/non-invasive-stability-measurem...

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Picotest

Apr 26, 20171 min read

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

Kenneth Wyatt Wyatt Technical Services, LLC ken@emc-seminars.comSteve Sandler Picotest steve@picotest.com Modern devices are...

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Impedance measurements stabilize op-amp buffers

Picotest

Jan 12, 20152 min read

Impedance measurements stabilize op-amp buffers

Figure 1. Op amps are often used as unity gain signal buffers, which are not as simple to use as it may appear. The unity-gain op amp...

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Picotest

Jan 7, 20151 min read

Impedance measurements make a difference at DesignCon

What do clock jitter, EMI, control loop stability, SPICE modeling, rogue waves and the ripeness of fruit have in common? Do you need to...

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Picotest

Oct 30, 20141 min read

Paultre on Power – Steve Sandler of Picotest on power test and noise (Podcast)

October 31, 2014 In this podcast Steve Sandler of Picotest talks to Alix Paultre of Power Systems Design on the issues of power test,...

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Picotest

Jul 1, 20142 min read

Three Stability Assessment Methods Every Engineer Should Know About

Many engineers are familiar with the Bode plot as an effective stability assessment method. However, some authors suggest and even teach...

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Software Enables Accurate Stability Test, Improves Non-Invasive Phase Margin Measurement Accuracy

Picotest

Apr 23, 20141 min read

Software Enables Accurate Stability Test, Improves Non-Invasive Phase Margin Measurement Accuracy

The mathematics behind the non-invasive measurement was incorporated into the OMICRON Lab Bode 100 VNA software, sold by Picotest.com,...

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Non-Invasively Assess Your Multiple-Loop LDO’s Stability

Picotest

Jan 6, 20141 min read

Non-Invasively Assess Your Multiple-Loop LDO’s Stability

Some low-dropout regulators (LDOs) use multiple feedback loops to improve output voltage transient response. In many of these cases, some...

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Troubleshooting Distributed Power Systems: Measuring Ripple (Part 7 of the ongoing series)

Picotest

Dec 10, 20131 min read

Troubleshooting Distributed Power Systems: Measuring Ripple (Part 7 of the ongoing series)

And by taking measurements across all three test domains, designers can trace power supply ripple-related problems back to root causes...

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Troubleshooting Distributed Power Systems: The Switch (Part 6 of the ongoing series.)

Picotest

Nov 14, 20131 min read

Troubleshooting Distributed Power Systems: The Switch (Part 6 of the ongoing series.)

With those measurement requirements as background, Sandler examines how switching frequency and duty cycle affect power supply stability...

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Picotest

Oct 30, 20132 min read

How To Verify Control Loop Design

The non-invasive stability assessment is a method that uses an output impedance measurement to accurately determine stability without...

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Troubleshooting Distributed Power Systems: Using Current Injectors (Part 5 of the ongoing video seri

Picotest

Oct 7, 20131 min read

Troubleshooting Distributed Power Systems: Using Current Injectors (Part 5 of the ongoing video seri

Although not quite as accurate as the two-port VNA impedance measurement, the current injection technique has advantages including wide...

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Picotest

Aug 27, 20131 min read

How to Solve 8 of 10 Design Issues

The vast majority of design issues are directly or indirectly attributable to control loop stability. The most common offenders: Linear...

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Picotest

Sep 28, 20121 min read

Assessing Point-Of-Load Regulators Using Non-Invasive Techniques

Evaluating the stability of a Point-Of-Load (“POL”) regulator can be performed using both traditional Bode plot and output impedance...

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Picotest

Sep 18, 20122 min read

FAQ #21: How do you use the Picotest injectors and the Agilent analyzer to measure output impedance

How do you use the Picotest injectors and the Agilent analyzer to measure output impedance and/or non-invasive step loading? For the...

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Picotest

Aug 20, 20122 min read

Exploring Bandwidth, Gain Margin and Phase Margin in Non-Invasive Measurement

Summary Among the most frequently asked questions regarding non-invasive stability measurement are “How do I determine the bandwidth,...

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