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

This video focuses on single-port measurements, describing how they can be applied to low power circuits such as linear regulators,...

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

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

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

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

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...

Fortunately, a new technique permits non-invasive stability testing of such devices.1 Designers can evaluate stability by measuring (on...

Is it possible to design an unconditionally stable linear voltage regulator? In fact, many believe that most regulator ICs are...

What injection resistor value should I use? Is it okay to use a little larger resistor like 30 or 50 ohm instead of 5 ohm (like many app...

Many articles and application notes describe the extraction of phase margin, using a non-invasive technique that extracts the phase...

There are cases where a Bode (gain?phase) plot cannot be obtained from a control loop. For example, a three terminal regulator or hybrid...

Designing a reliable circuit that employs a voltage reference requires a more detailed look at device parameters than most data sheets...

Output impedance is the key to testing filter and regulator phase margin, even when the control loop is inaccessible. Many voltage...

A single, simple measurement is described that allows the determination of the ESR required to achieve a desired phase margin, using a...

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When measuring a circuit or device with our network analyzers, engineers generally inject a signal and believe that the measured results...

Developed to aid power supply designers in control-loop stability analysis, Picotest’s line of signal injectors are being introduced as...