## 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...

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Picotest

- Apr 9, 2020
- 1 min

By Steve Sandler | January 28, 2020 One method of designing stable control loops is to create an accurate broadband simulation model and...

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Picotest

- Jun 20, 2017
- 1 min

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

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Picotest

- Nov 30, 2016
- 1 min

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

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Picotest

- Jan 13, 2015
- 2 min

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

- Nov 14, 2014
- 1 min

BROWSER-CLASS PROBE Several companies manufacture and distribute high-frequency TDR probes. These probes are typically designed for very...

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Picotest

- Oct 31, 2014
- 1 min

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, 2014
- 2 min

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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Picotest

- Apr 23, 2014
- 1 min

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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Picotest

- Jan 23, 2014
- 2 min

In 1938 Hendrik Wade Bode, who worked at Bell Labs, published his asymptotic assessment of phase margin and gain margin, bearing his name...

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Picotest

- Jan 7, 2014
- 1 min

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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Picotest

- Nov 8, 2013
- 2 min

A frequency response analyzer (‘FRA’) is often used to measure gain and phase plots of control loops (Bode plots), filter responses and...

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Picotest

- Oct 30, 2013
- 2 min

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

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Picotest

- Oct 8, 2013
- 1 min

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, 2013
- 1 min

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

- Jun 12, 2013
- 1 min

As Sandler explains, analysis based on impedance measurements can more thoroughly assess control loop stability than Bode plot...

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Picotest

- May 15, 2013
- 1 min

In this 5-minute video presentation, Steve Sandler discusses how stability impacts circuit performance, offering examples that...

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Picotest

- Sep 28, 2012
- 1 min

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 28, 2012
- 1 min

We can equate the stability to an equivalent phase margin by assuming the magnitude of the gain vector to be 1 and solving for the Q. In...

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Picotest

- Sep 18, 2012
- 2 min

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, 2012
- 2 min

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

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