By Steve Sandler | January 28, 2020 One method of designing stable control loops is to create an accurate broadband simulation model and to use pole zero compensation to optimize phase margin, gain margin and stability margin…” Click here to read entire article #j2102b #design #ESR #j2100aj2101a #articles #2portshunt #applicationnotes #bode100 #nism #dcdcconverter #noninvasivemeasurement #stability #converter #switchmodepowersupply #spacepower #regulator #bodeplots #controllo

In this application note, we will show you the basic principles for making this stability measurement and how to use these instruments to make the measurement.” Read the entire app note here. #phasemargin #gainmargin #oscilloscopes #j2100aj2101a #powerintegrity #siglent #injection #frequencyresponseanalyzers #feedbackamplifier #powersupply #VNA #picotest #stability #bodeplots #controlloop

All conference pass holders are eligible to attend, but pre-registration happens during the registration process. After attending an EDI CON University course, attendees can earn IEEE Continuing Education Unit/Personal Development Hour (CEU/PDH) certificates and enjoy a complimentary lunch on the expo floor. This year’s EDI CON University sessions are sponsored by Teledyne LeCroy, Mini-Circuits and Keysight Technologies. CLICK HERE to register today. Write a short essay to su

PROVEN TECHNIQUES FOR GENERATING HIGH-FIDELITY MEASUREMENTS Power Integrity: Measuring, Optimizing, and Troubleshooting Power Related Parameters in Electronics Systemsprovides field-tested techniques for producing high-fidelity measurements using the appropriate equipment. The book thoroughly discusses measurement guidelines, test instrument selection and use, connecting the equipment to the device being tested, and interpreting the acquired data. The latest electronics techn

All conference pass holders are eligible to attend, but pre-registration happens during the registration process. After attending an EDI CON University course, attendees can earn IEEE Continuing Education Unit/Personal Development Hour (CEU/PDH) certificates and enjoy a complimentary lunch on the expo floor. This year’s EDI CON University sessions are sponsored by Teledyne LeCroy, Mini-Circuits and Keysight Technologies. CLICK HERE to read the full article and see this year’s

More information on this revolutionary measurement technology can be found here: https://www.picotest.com/non-invasive-stability-measurement.html. #DTBK01 #decoupling #vrts3 #j2102a #bode100 #nism #noninvasivemeasurement #stability #impedance #controlloop #P2101A

Figure 1. Op amps are often used as unity gain signal buffers, which are not as simple to use as it may appear. The unity-gain op amp (operational amplifier) buffer circuit is routinely used to transform high-impedance inputs into low-impedance outputs. ADC (analog-to-digital converter) voltage references are also frequently buffered to reduce the voltage reference noise resulting from the ADC sampling current. When implemented well, using an appropriate op amp, the results w

The mathematics behind the non-invasive measurement was incorporated into the OMICRON Lab Bode 100 VNA software, sold by Picotest.com, starting in late 2011. The solution was included as a single cursor based measurement utilizing a piecewise linear approximated solution.  The approximate solution is most accurate below 40 degrees, while the method is capable of accurately determining phase margins up to nearly 70 degrees. Thanks to the completion of a license agreement with

In 1938 Hendrik Wade Bode, who worked at Bell Labs, published his asymptotic assessment of phase margin and gain margin, bearing his name [2]. The Bode plot is recognized for its simplicity and the simple asymptotic approach makes the method useful for both design and assessment of power system control loops.  There have been many other methods introduced since, including Nathaniel Nichol’s stability charts in 1947 [4] and root locus introduced by Walter Evans in 1948 [5].  I

Some low-dropout regulators (LDOs) use multiple feedback loops to improve output voltage transient response. In many of these cases, some or all of the loops are inside the IC. Designers can assess the stability of these regulators by using the non-invasive stability measurement capability of the OMICRON Lab Bode 100 vector network analyzer (VNA). The simplified schematic in Figure 1 shows traditional error amplifier feedback along with a second loop that connects some functi

And by taking measurements across all three test domains, designers can trace power supply ripple-related problems back to root causes such as switching frequency, load dynamics, and PCB crosstalk as explained here. Various test setups, which include instruments from Picotest and other vendors, and measurement techniques are described in this video and results of example ripple measurements using different point of load regulators (POLs) are discussed. Along the way, Sandler

With those measurement requirements as background, Sandler examines how switching frequency and duty cycle affect power supply stability as well as EMI. Measurements taken at the switch-node reveal information about power supply stability, noise, and EMI and how these characteristics are affected by switching frequency and duty cycle. Click here to watch the video. #oscilloscopes #noise #ripplemeasurements #picotest #videos #emimeasurement #stability #clockjitter #timedomainm

Although not quite as accurate as the two-port VNA impedance measurement, the current injection technique has advantages including wide range (approx. 1 milli-ohm to thousands of ohms), the ability to measure in-system, and a suitability for measuring low-power devices such as op amps, voltage references and voltage regulators. In addition, current injectors can be used to carry out other types of tests such as non-invasively measuring PSRR, determining power integrity and si