Power Integrity

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Analog Devices, Inc. today introduced a precision integrated analog front end, controller, and pulse-width modulator (PWM) for battery testing and formation capable of increasing system accuracy and efficiency in lithium-ion battery formation and grading.

How do you design power for sensitive circuits including LNAs, clocks, and PLL circuits? Although these circuits consume low power, they are sensitive to even very low levels of power rail noise. This EDI CON USA 2017 Outstanind Paper Award wining paper discusses the various noise paths that contribute to the degradation of the sensitive circuit as well as how to optimize, measure, and troubleshoot power supply related noise for these applications.

This paper, presented at EDI CON USA 2017, demonstrates the use of a special probe tip utilized to convert a differential measurement of inductor voltage to a measurement of inductor current. It shows the connection and calibration considerations in the measurement of inductor current, including the digital signal processing algorithms required to compensate for the components in the power supply and the probe tip. It also explains current sharing measurements made in the time and frequency domain using a transient current generator.

Microwave engineers know that sharp corners and right-angle bends have their drawback at high frequencies. So what happens if we go to the other extreme of the spectrum, to DC? Istvan Novak takes a closer look.

Measuring sub-milliOhms is difficult.  Getting low noise, sub-milliOhm measurements in very small circuits is a bit more difficult.  We recently had the opportunity to support R&D Altanova in performing this difficult measurement, here are some of the results.

If you want help measuring things, there’s no cheaper way to do it than this!

Read Eric’s suggestions on measured voltage noise and download a free sample of Eric and Larry’s new PDN Design book.