Part One: Preparing for Measurement What if you could do full automated stability testing in 30 seconds? Perform a complete large scale analysis on any power supply? And learn how to fix any stability issue? That’s the power of SEPIA, developed by Steve Sandler of Picotest. In this two part blog, we will discuss how SEPIA transforms non-invasive stability measurement processes and how you can leverage automation to make your stability testing more efficient, including insights into VRM...

Figure 1: DDR5 Interposer by EyeKnowHow Why Use DRAM Interposers for Signal Measurement? JEDEC standards define the DRAM input parameters at the ball of the DRAM, since it is the last point a probe can access for signal measurement. In practice, with designs becoming increasingly complex and compact, accessing the ball of the DRAM can be a challenge. Or sometimes, the closest measuring point is centimeters away, which will result in an inaccurate reading of the signal at the ball. In some...

In this video, we are performing a non-invasive stability measurement (NISM) on our PDN to check impedance. This specific stability measurement allows us to evaluate the health of the power delivery network without accessing with the feedback loop. When looking at the measurement graph in the Bode Analyzer Suite, we can see that there is a sharp peak in the graph, indicating PDN instability. We are measuring the output of the voltage regulator module (VRM) and using the Bode Analyzer Suite to...