Insights:
All
-
Troubleshooting Distributed Power Systems: Why Stability Matters (Part 1 of the ongoing video series.)
Control-loop stability impacts power supply performance in multiple ways. Even if the control loop is not oscillating, poor stability—as evidenced by low phase margin—in…
-
Target impedance based solutions for PDN may not provide realistic assessment
One of the more common design techniques for power distribution networks (PDN) is the determination of the peak impedance that will assure that the…
-
FAQ #23 What Injectors do I need for PDN Measurements?
Our J2112A current injector has been the most requested product to date. It provides a very fast low current pulse, though based on a…
-
How to Make Higher Voltage Power-Distribution-Network Measurements
A two-port power distribution network (PDN) measurement is arguably the most accurate method of measuring low-value impedances, such as the output of point of…
-
Clock Power Optimization Depends On Jitter Control
Clock-jitter performance has become a top priority among clock, analog-to-digital controller (ADC), and power-supply manufacturers. Why? Simply, it interferes with the performance of digital…
-
Assessing Point-Of-Load Regulators Using Non-Invasive Techniques
Evaluating the stability of a Point-Of-Load (“POL”) regulator can be performed using both traditional Bode plot and output impedance measurement techniques. Measuring output impedance…
-
FAQ #22: So how does this non-invasive measurement relate to phase margin and gain margin?
It doesn’t, at least not directly. Since stability is an assessment of the proximity of the gain vector to the singular unstable point, (1,0)…
-
New Injector Supports Testing of POLs
High Fidelity POL Testing with the J2112A The J2112A: Faster, Non-Invasive, and High Fidelity POL Step Load Testing Testing the step load performance of…
-
FAQ #21: How do you use the Picotest injectors and the Agilent analyzer to measure output impedance and/or non-invasive step loading?
How do you use the Picotest injectors and the Agilent analyzer to measure output impedance and/or non-invasive step loading? How do you use the…
-
Making Ripple Measurements
Making ripple measurements has traditionally been using an oscilloscope. For a number of technical reasons, an oscilloscope, in general, is not necessarily the best…
-
Sharpen Rising and Falling Edges
Wherever you find a digital control signal, you find sharp rising and falling edges that need characterization. These edges occur on switching power supplies…
-
Exploring Bandwidth, Gain Margin and Phase Margin in Non-Invasive Measurement
SummaryAmong the most frequently asked questions regarding non-invasive stability measurement are “How do I determine the bandwidth, phase margin and gain margin from the…