Articles Tagged with ''measurement''

Join Eric Bogatin, SIJ Technical Editor, in his latest conversation with Mike Resso to discover the marriage of measurement and simulation tools and a demonstration of a 224 Gbps channel.

Exceeding the speed limit is the theme of this issue of Signal Integrity Journal (SIJ), and nowhere is speed more of a design concern than for connectors. As connectors get smaller and denser while handling faster speeds, there is a significant chance that signal interference and crosstalk will increase. The following is a compilation of everyone’s thoughts on what’s new, what’s real, and what we should be worried about.

In this Extreme Measurement story, the goal was to determine the dynamic current of the FPGA by measuring the AC current in an external VRM using a transformation of the PCB S-parameters and the simultaneous measurement of the AC voltages across the PDN.

Check out this latest installment in the Extreme Measurements Blog that covers the measurement challenges for GaN switches.

I do not know if there was a legitimate reason for this request, but I was once asked to determine the turns ratio of a power transformer inside a sealed, DC-DC converter module.  In any case, there is not much usable information since the module is sealed, but we can apply a simple trick. Check out this latest installment in Extreme Measurements.

This extreme measurement seems more impossible than difficult.  The traditional stability assessment method for voltage regulators is the Bode plot.  Access to the control loop is required and a small signal is injected into the control loop, usually via a resistor, placed at the top of the voltage sense divider. Without access to this voltage divider, there isn’t a place to inject a signal into the control loop, and therefore the Bode plot is seemingly impossible…

Now that I am teaching full time and have a number of undergraduate and graduate students doing weekly project reviews, I listen to more presentations than I give. I find myself giving the same feedback over and over again. So, I thought I would share my eight most common comments and tips to engineers giving presentations.

In this Extreme Measurement Example, see how measurements were used to resolve the shield resistance issue, where the authors redesigned the PCB to clear the DUT contact, but also identified alternate solutions in the event they could not wait for a new PCB.

This first post in a new blog series, Extreme Measurements, introduces how an extreme measurement is defined. Find out how your extreme measurement story can end up on SIJ!

This article explains the steps to use a TDR to measure very small values of inductance and capacitance, including tips for better measurements.