Articles

  • 1 month ago | centerconsolelifemag.com | Lisa Bucher |Steve Sandler

    By Steve SandlerSelecting the right propeller is the easiest and cheapest way to improve performance. Propeller test results are frequently published and new propellers reviewed in boating periodicals. Propeller slip factor is usually calculated and included in these test results. Unfortunately, slip is often misunderstood and its value overstated as a key factor in selecting the best propeller.

  • Jan 21, 2025 | signalintegrityjournal.com | Heidi Barnes |Steve Sandler |Benjamin Dannan

    Hardware engineers are learning the hard way that power integrity (PI) requires electromagnetic (EM) simulation of the printed circuit board (PCB) power delivery network (PDN). Traditional rules-of-thumb and leveraging data sheet examples are not an option as designs move from hundreds of Amps (A) to thousands. 1000 A across a 100 microhm (µΩ) PCB PDN is still 100 millivolts (mV) of IR drop and 100 Watts (W) of power dissipating as heat.

  • Nov 13, 2024 | signalintegrityjournal.com | Steve Sandler

    Recently, Picotest has had several questions from customers working to measure battery impedance. There are numerous publications and articles about testing battery impedance, even from VNA manufacturer’s such as OMICRON Lab, including a useful 2017 application note guide from Florian Hammerle.1This article will discuss some of the reasons for measuring battery impedance.

  • Aug 5, 2024 | signalintegrityjournal.com | Steve Sandler

    Core power rails are now routinely in the 1 kAmp to 2 kAmp range, requiring a power distribution network (PDN) impedance in the range of 20 µΩ to 30 µΩ.  I am known for saying “Measure something you know before measuring something you do not; and of the same order of magnitude.” This makes sense. It provides a validation of your measurement setup, and it assures that the measurements you are going to make are within the dynamic range of the setup.

  • Aug 1, 2024 | signalintegrityjournal.com | Steve Sandler |Benjamin Dannan |Heidi Barnes |Idan Ben Ezra

    Designing a power distribution network (PDN) for a scalable 2000 Amp power supply presents numerous challenges. This paper will address these challenges while demonstrating how to design, simulate, and validate a scalable core power rail with a current of 2000 Amp. The most common architectures for high-current power rails utilize a 48 VDC input to reduce the current to a more manageable level.

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