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

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

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

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...

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

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

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

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

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

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

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

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

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

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

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...

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...

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,...