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...
November 23, 2021 Steve Sandler This extreme measurement seems more impossible than difficult. The traditional stability assessment...
By Benjamin Dannan and Steven Sandler, Picotest.com High speed Printed Circuit Board (PCB) design requires well designed Power Delivery...
By Benjamin Dannan and Steven Sandler, Picotest.com, and Subbaiah M. Pemmaiah, Coppermountaintech.com High speed Printed Circuit Board...
IEEE MTT-S Latin America Microwave Conference: https://lamc-ieee.org/ Registration: http://bit.ly/lamc-2021-sandler Full Program:...
By Benjamin Dannan and Steven Sandler, Picotest.com High speed Printed Circuit Board (PCB) design requires well designed Power Delivery...
Control loop stability is critically important. But whether your focus is on power supply design, power integrity, or mixed-signal power...
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...
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...
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...
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...