A Bode Plot Without Access to the Control Loop
November 23, 2021 Steve Sandler This extreme measurement seems more impossible than difficult. The traditional stability assessment...
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DesignCon Digital 2021
October 5 & 6, 2021 "This online event from the producers of DesignCon features an education program with on-demand webinars presented by...
Tektronix Innovation Forum 2021 Sessions with Steve Sandler
TDR Functionality for Power Integrity (30 mins) During this smart bar session, learn how to use TDR techniques to better understand power...
Solving Power Integrity Test Challenges with Guest Speaker for Q&A Steve Sandler of Picotest
Learn how to use the MSO6 Oscilloscope to measure input filter stability, PSRR, impedance, step load, inductors with DC bias, TDR, EMI,...
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...
The 5-Minute Method for Stabilizing Any Control Loop
By Steve Sandler | January 28, 2020 One method of designing stable control loops is to create an accurate broadband simulation model and...
Video: Measurement-Based, Harmonic Balance VRM Model
A presentation by Steven Sandler from Picotest, DgCon 2019 Modern high-performance power rail design requires high accuracy voltage...
Why Full VRM Characterization is Essential
Read the entire article here. #powerdistributionnetwork #noise #powerintegrity #ads #psrr #powersupply #inputimpedance...
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...
Bode Plots are Overrated
Control loop stability is critically important. But whether your focus is on power supply design, power integrity, or mixed-signal power...
Characterizing and Modeling Switch Mode Power Supplies (Mar 15)
Original air date: March 15, 2017 Why this Webcast is Important: Whether your power supply designs are based on switch mode or linear...
Killing the Bode Plot
Many new linear devices, including voltage references, voltage regulators and opamps have internal feedback loops, prohibiting...
Essential 1-Port PDN PROBE: Applications Abound
BROWSER-CLASS PROBE Several companies manufacture and distribute high-frequency TDR probes. These probes are typically designed for very...
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...
Five Things Every Engineer Should Know About Bode Plots
In 1938 Hendrik Wade Bode, who worked at Bell Labs, published his asymptotic assessment of phase margin and gain margin, bearing his name...
Combination VNA/FRAs Offer More Capability And Lower Cost
A frequency response analyzer (‘FRA’) is often used to measure gain and phase plots of control loops (Bode plots), filter responses and...
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...
Troubleshooting Distributed Power Systems: Impedance Is the Critical Measurement (Part 2 of the ongo
As Sandler explains, analysis based on impedance measurements can more thoroughly assess control loop stability than Bode plot...
Troubleshooting Distributed Power Systems: Why Stability Matters (Part 1 of the ongoing video series
In this 5-minute video presentation, Steve Sandler discusses how stability impacts circuit performance, offering examples that...
When Bode Plots Fail Us
It may come as a surprise to some that a control loop’s Bode plot does not always depict the loop stability and that the output impedance...
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