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OMICRON Lab
Austria
Приєднався 10 сер 2011
Learn more about our Smart Measurement Solutions!
See how to use the Bode 100 in your daily electronics design work and learn more about a high variety of measurement applications.
See how to use the Bode 100 in your daily electronics design work and learn more about a high variety of measurement applications.
Bode 500 - Insights from a Development Engineer
Join Dr. Ali Shirsavar from Biricha Digital in a "serious" interview with Kurt, a senior development engineer from OMICRON Lab. Together, they discuss the development process of the new Bode 500 Vector Network Analyzer, and the challenges faced throughout the journey.
Переглядів: 433
Відео
A Power Supply Filter with On-board Voltage Socket for 12V 10A
Переглядів 3623 місяці тому
by Günther Klenner - K&K Prime Our customer with a portable, battery-powered device sold his system for an in-car use. He said: “We just need a cable with an on-board 12V voltage socket,” and the project started. Join me on our way through the whole chain of developing such a filter. The project includes setting up the specifications, selecting the components, performing SPICE simulations, cons...
Designing Digital Control Loops and Firmware
Переглядів 3743 місяці тому
by Andreas Reiter - Microchip Technology Over the past 15 years, digital control of power supplies has conquered specific markets and applications. Although this approach provides a wide range of new capabilities required to enable new technologies, such as driving new, complex converter topologies or solving system-level challenges in hyper-adaptive power distribution networks, it also introdu...
Using S-Parameters for the Design of EMC Filters
Переглядів 4623 місяці тому
by Arturo Mediano - University of Zaragoza This is a talk to explain to non-RF engineers what s-parameters are, how you can measure them using a vector network analyzer like the Bode 100 or Bode 500, how to apply them in EMC filter characterization, and how to export data for simulation (i.e. LTSPICE) to evaluate the effect of different terminal impedances.
PDN Impedance Measurements using the Bode 500 and Picotest PDN Probes
Переглядів 1,1 тис.3 місяці тому
by Florian Hämmerle - OMICRON Lab The power delivery network (PDN) describes the complete system delivering the power from the power source (i.e. a battery or a AC/DC power supply) to the power sink (i.e. a processor or FPGA). The PDN must be able to provide a sufficiently low source impedance such that the voltage drop does not exceed the limits when the maximum current is flowing. The faster ...
An Introduction to Power Supply Simulations with SIMPLIS
Переглядів 5593 місяці тому
by Christophe Basso - Future Electronics A simulation engine is a convenient and powerful tool when designing switching power supplies. If many simulation engines are available nowadays, few can deliver all the needed information to design the entire circuit: SPICE is a valuable assistant but it is prone to convergence issues and has difficulties with long-run PFC simulations. Besides, you need...
Power Supply Compensator Design Using Operational Transconductance Amplifiers
Переглядів 9993 місяці тому
by Dr. Ali Shirsavar - Biricha Digital The design of compensators with standard voltage error amplifiers, i.e., a typical operational amplifier (op-amp), is well documented in many books, application notes, design examples, and even automated software. What received less attention is compensator design using operational transconductance amplifiers (OTAs). Unfortunately, our PWM controller IC of...
"Exploring the Bode 500 Vector Network Analyzer" with Dr. Ali Shirsavar.
Переглядів 1,3 тис.3 місяці тому
Dr. Ali Shirsavar is one of the first people who gets his hands on the Bode 500 from OMICRON Lab. He provides a brief introduction to the new multifunctional Vector Network Analyzer which includes Impedance Analyzer and Frequency Response Analyzer functions. Find out more about the Bode 500: www.omicron-lab.com/products/vector-network-analysis/bode-500
Accurate Loop Gain Measurements, Tips & Tricks
Переглядів 3,4 тис.Рік тому
by Florian Hämmerle - OMICRON Lab Loop Gain measurements are a powerful tool when designing a compensator of a switching power supply or to verify the small-signal stability of voltage regulators or switchers having a feedback circuit for a stabilized output voltage. Since the availability of price effective vector network analyzers like the Bode 100, loop gain measurements have gained in popul...
Control Methods of LLC Converters
Переглядів 12 тис.Рік тому
by Christophe Basso - Future Electronics Targeting practicing engineers and graduating students, this seminar starts with a review of soft-switching definitions and explains how a typical LLC converter operates. The description of the direct-frequency control opens the discussion on control methods and more recent approaches are covered such as charge- and current-mode controls. Control-to-outp...
Shielding Low Frequency Magnetic Fields
Переглядів 4,1 тис.Рік тому
by Arturo Mediano - University of Zaragoza It is common to consider EMI problems appear at high frequencies. Higher frequencies are usually responsible for parasitic couplings, undesired effects of non-ideal components, and other unexpected results for electronic designers. But, there are a lot of situations where low frequencies can create serious problems for electronic systems. Any sector ca...
Digital Average Current Mode Control of Switch-Mode Power Supplies
Переглядів 3,6 тис.Рік тому
by Andreas Reiter - Microchip Technology Average Current Mode Control (ACMC) of switch-mode power supplies has substantial, practical advantages over common Voltage Mode Control (VMC) or Peak Current Mode Control (PCMC) implementations in terms of robustness, reliability, and flexibility. Especially in dynamic applications, such as battery chargers, bidirectional converters, multiphase converte...
PSRR - Why measure it, the Measurement Errors and how to correct them
Переглядів 1,5 тис.Рік тому
by Steve Sandler - Picotest Modern distributed systems are noise sensitive. Power rail noise is one of the most significant sources of jitter in high-speed systems, phase noise in RF systems and noise in A/D and D/A converters. Recommendations abound, from adding ferrite beads and ceramic caps, to LDO’s to clean the power supply rails. The most basic of measurements is the frequency domain PSRR...
How to use Off-the-Shelf Transformers in Switching Power Supplies
Переглядів 991Рік тому
by Dr. Ali Shirsavar - Biricha Digital Configurable, off-the-shelf transformers have been available for many years. However, their use is not common and general consensus is that you need a custom transformer even for the simplest of designs. A quick search on the internet shows that when it comes to off-the-shelf transformers, design information is very scarce, few guidelines are available and...
Step-by-step Snubber and Clamp Design for Power Supplies
Переглядів 23 тис.2 роки тому
by Dr. Ali Shirsavar - Biricha Digital In this session Dr. Ali Shirsavar will go through step-by-step design of RC snubbers and RCD clamps for power supplies. The circuit operation, practical considerations and all equations are presented as well as details of how to obtain all the unknown parameters in the equations. Two free to download spreadsheets are also presented which will do the calcul...
Practical System Modelling using Bench Measurements of Plant Transfer Functions
Переглядів 3,5 тис.2 роки тому
Practical System Modelling using Bench Measurements of Plant Transfer Functions
Impedances in DC-Microgrids - from Offline to Online Measurements
Переглядів 1,1 тис.2 роки тому
Impedances in DC-Microgrids - from Offline to Online Measurements
The Simple Truth about Complex Impedance Probes
Переглядів 9082 роки тому
The Simple Truth about Complex Impedance Probes
Automated PCB Parasitics Extraction from EDA Tools for Power Electronics Design Support
Переглядів 1,6 тис.2 роки тому
Automated PCB Parasitics Extraction from EDA Tools for Power Electronics Design Support
Comparing DC/DC conducted EMI Simulation with Measurement Results
Переглядів 3,1 тис.2 роки тому
Comparing DC/DC conducted EMI Simulation with Measurement Results
Single Cable and Connector Bode Diagrams and Step-Load Adapter for DC/DC Bode Measurements
Переглядів 5512 роки тому
Single Cable and Connector Bode Diagrams and Step-Load Adapter for DC/DC Bode Measurements
Seamless Software Adaptation of High Performance Power Modules in Power Distribution Networks
Переглядів 8753 роки тому
Seamless Software Adaptation of High Performance Power Modules in Power Distribution Networks
The Interactions Between Power Electronics, Power Integrity, Signal Integrity and EMI
Переглядів 3,1 тис.3 роки тому
The Interactions Between Power Electronics, Power Integrity, Signal Integrity and EMI
Measurement-based Characterization of Passive Electronic Components
Переглядів 5363 роки тому
Measurement-based Characterization of Passive Electronic Components
The Search for the Best DC-Bias Components
Переглядів 1,5 тис.3 роки тому
The Search for the Best DC-Bias Components
Webinar: Power Supply Dynamics and Stability (Loop Gain Measurement)
Переглядів 6 тис.4 роки тому
Webinar: Power Supply Dynamics and Stability (Loop Gain Measurement)
Webinar: Input Impedance and Filter Stability of DC/DC Converters
Переглядів 9 тис.4 роки тому
Webinar: Input Impedance and Filter Stability of DC/DC Converters
So ein typischer Österreicher! Oder, besser gesagt, Wiener... Ok, a bit of joking...but, if you took this seriously, you might get a rather "interesting" view of Omicron! Viel Spaß, folks, formerly Tek, Agilent, Nokia, R&S guy
Might be a bit of a mixture between Austrian and British humor. 😉
Useless video. Could do better by measuring loops for various converters such as PFC, DC-DC etc
We are sorry if this video does not match all expectations. We think a little fun can also be useful. 🙏
What would be the best shielding to protect circuitry in close proximity to a high voltage Tesla coil? Copper or Aluminum?
Please get in contact with the presenter directly. Thanks!
What if the input impedance is really close to 50ohm? Let's assume 150ohm. What's the other measuring technique that does not use the bode output voltage? 01:26 to 02:25
Dear @NoaddictQ, please be aware that the video as well as the SW used in this video is really old. Therefore, please check out this newer application note: www.omicron-lab.com/applications/detail/news/audio-system-measurements as well as the appnote on impedance measurement methods: www.omicron-lab.com/applications/detail/news/impedance-measurements-using-the-bode-100. If you have any further questions, please contact us here: www.omicron-lab.com/contact/support
Confusing name for product. It is marketing department vs R&D projekt name. It is classic conflict, we have the same problems in our company. 😂😂😂😂
😄
Excellent tutorial.
Is it OK to use an electrolytic in an EMI filter as an X-capacitor?
Normally, an X-capacitor is a safety certified capacitor that can withstand over-voltages coming from the line.
thanks for this video, I am modelling PCB parasitic too (ADS PEPRO), for validation I have quite the same(results) but damping of the ringing (attenuation), How can I correct that? Best regards
This is a very detailed question. Can you please contact the presenter directly? Thanks!
@@OMICRONLabTutorials thanks, i'll reach him
Thank you.
Common Mode currents will see both inductors, so why not short out the two inputs and the two outputs?
Your proposal is also possible and should give similar results.
The described solution is based on the idea of conducting the filtered noise to protective earth, and getting rid of it. But in Class II devices, where you don’t have any protective earth to conduct the noise to it, how we filter the noise?
how about magnetic field on shorted traces ?
Can you please be more specific on your question and send it to support@omicron-lab.com? Thanks!
@@OMICRONLabTutorials I want to know what happens to the magnetic flux when there is a short between power rail and ground especially on multilayer board. Is the magnetic field cancelled out or somehow concentrated and disturbed resulting in stronger field?
@@farisikhmal4868 generally a short will cause a high current and a high current can cause a high magnetic field. If this field disturbs something else will depend on the situation.
At 33:31 Loop 1 is drawn going from the cathode to the anode of the diode. This would occur during reverse recovery, but only for a short period of time. Was this loop meant to include the inductor and output capacitor?
Dear @ats89117, we just talked to Dr. Ali Shirsavar, and that was his response to your question: "Loop1 is drawn for when the current is conducting through the switch, i.e., when the switch is turned on. Loop2 is drawn for when the current is conducting through the diode, i.e., during switch turn-off. From a layout perspective, we are just trying to identify which loops have high di/dt at "some point" during the switching cycle. Apologies for the ambiguity!"
Very good presentation, but we probably didn't need to know that you hadn't worn a shirt since last March!
Hi, I'm gonna use the device to measure the common mode impedance of a motor. Which configuration is suitable and which connector type should I use?
Dear @hassankhanbabaie2209, thanks a lot for your question! Please use this contact form (www.omicron-lab.com/contact/support) to send us the schematics of your DUT and some more information.
ceramic cap esl is very high in the model
Thank you, very useful materials.
thanks for nice video, can you share the slides?
Please send a message to support@omicron-lab.com.
13:15 Is the additional +180 of phase on in the Analyzer Suite true for only the loop gain measurement? In other words, if I switch the probes around to measure the compensator as in 43:60, will its phase also be shown with an additional 180 degrees of phase? Based on actual measurements with my Bode 100, i'm seeing a low-freq phase of a Type-II OTA compensator as around +90 degree. But in a spice simulation it starts out at -90 degree. Just wanting to make sure I'm interpreting this correctly. This is a super-informative video by the way. Thank you Florian.
The "additional 180° phase shift" is actually not "additional" but it is there in the real physical system whereas it is not there in a theoretical open-loop analysis of a negative feedbacks system. Bode 100 will always measure the real physical system. In case of an inverting error amplifier with integral part, there is a -180° phase shift from the inverting configuration and a -90° phase shift from the integrator part. In total this is -270° which equals +90° phase. Did you use an inverting configuration in your spice simulation?
@@OMICRONLabTutorials You are exactly right. I went back to my simulation and sure enough did not have it configured to inverting. Even in my own derivation of the compensator I didn't propagate negative sign through. Now everything is reading +90 on the compensator's phase at low-freq. Thank you Florian for point this out.
🎯 Key Takeaways for quick navigation: 00:04 *🎓 Introduction et Contexte* - Présentation de Christophe et de son parcours professionnel, - Introduction au sujet des convertisseurs LLC. 00:42 *🔧 Fonctionnement de Base du Convertisseur LLC* - Explication des principes de commutation et de l'impact des parasitismes, - Définition de la zone de fonctionnement sûr (SOA) et de ses implications, - Importance des réseaux de suppression pour réduire les pertes de commutation. 06:00 *🔄 Principe de Fonctionnement des Convertisseurs LLC* - Description des éléments résonants : condensateur série, inductance de magnétisation et inductance de fuite, - Avantages de la topologie de commutation douce pour les applications à haute fréquence. 10:11 *⚡ Contrôle du Flux de Puissance* - Importance de la symétrie du rapport cyclique 50% pour assurer une commutation correcte, - Utilisation du temps mort pour éviter les courts-circuits transitoires et assurer la commutation à tension nulle (ZVS), - Impact de la fréquence de commutation sur les caractéristiques de transfert du convertisseur. 14:00 *🔍 Analyse des Impédances et Contrôle en Fréquence* - Étude des différentes régions d'impédance capacitive et inductive, - Importance de la fréquence de résonance pour le fonctionnement efficace du convertisseur LLC, - Explication des modes de commutation et de la gestion des courants de magnétisation. 17:08 *📊 Caractérisation et Simulation* - Utilisation de modèles de simulation pour prédire les performances du convertisseur, - Importance de la simulation des transistors et de l'adaptation des temps morts, - Outils et méthodes pour vérifier et optimiser le fonctionnement du convertisseur en conditions réelles. 22:02 *📈 Régulation de la Sortie du Convertisseur LLC* - Stratégies de régulation de la fréquence de commutation pour moduler la puissance de sortie, - Impact du réseau résonant sur les caractéristiques de transfert DC, - Conception des contrôleurs LLC pour assurer une régulation précise et efficace. 24:29 *🔬 Analyse de la Fonction de Transfert* - Difficultés de dérivation de la fonction de transfert pour les convertisseurs LLC, - Importance des fonctions de transfert de contrôle à sortie pour l'analyse de la stabilité, - Méthodes avancées pour comprendre et modéliser la réponse du convertisseur aux stimuli de contrôle. 25:44 *📉 Fonction de Transfert et Simulation* - Analyse des fonctions de transfert des convertisseurs LLC, - Importance des simulations pour comprendre les réponses en petite et grande signalisation, - Utilisation de Simplis pour extraire les réponses AC en petits signaux. 27:32 *⚙️ Conception et Modélisation* - Importance de la caractérisation du point de polarisation pour des résultats précis, - Simulation des courbes de réponse et ajustement des marges de phase et de gain, - Analyse des tolérances des composants et de leur impact sur la stabilité. 32:19 *🔄 Techniques de Contrôle Indirect* - Présentation de la technique de contrôle par charge pour les convertisseurs LLC, - Avantages de la réponse de premier ordre pour la stabilité de la régulation, - Modélisation simplifiée et analyse des marges de phase avec des techniques de contrôle indirect. 37:57 *💡 Contrôle par Phase et Impulsion* - Introduction au contrôle par phase et par impulsion pour la régulation des convertisseurs LLC, - Méthodes pour ajuster la durée des impulsions et contrôler indirectement la fréquence de commutation, - Utilisation des transformateurs de courant pour la gestion des surintensités et la robustesse du convertisseur. 51:44 *🔄 Contrôle par Déphasage* - Introduction au contrôle par déphasage pour les convertisseurs LLC, - Principe de fonctionnement : observation des courants résonants et modulation du cycle d'oscillateur, - Impact sur la commutation à tension nulle et la régulation du flux de puissance. 53:10 *🏠 Implémentation du TSC (Contrôle par Déphasage)* - Implémentation du contrôle par déphasage dans un package autonome de 20 broches, - Caractéristiques : tension de fonctionnement jusqu'à 800 volts, diodes bootstrap intégrées, - Modèle de modulation Simplis pour vérifier le comportement du modulateur et la réponse en fréquence. 55:03 *⚡ Comparaison des Techniques de Contrôle* - Comparaison entre les techniques de contrôle par fréquence directe et par déphasage, - Avantages du contrôle par déphasage : meilleures marges de stabilité, réponse en fréquence améliorée, - Application typique : convertisseurs PFC et LLC pour des applications de 100 watts. Made with HARPA AI
Hi Christophe: In 20:20, 'The Process of Finding the Right Point', right chart, why the two current curve have a suddend change after the POP start? In my understand , the POP is try to find the correct operation point, include the operate current , if have such sudden change ,is it means the current before POP is not correct ?
For such a specific question, can you please get in contact with Christophe directly? Thanks!
Sir, please could you explain how to measure the loop gain if we use the hall sensors for the voltage measurement?
The principles explained in this video apply to any control loop / feedback where the information flows in form of a voltage. Please contact support@omicron-lab.com for specific questions.
Great video. Around 21 minutes in, you mention a video in which you discuss how to handle too much ramp in the controller. Could you provide a link or the title of the video? Thanks in advance.
Not sure but maybe Dr. Ali Shirsavar was refering to a video that is not yet released. There are a couple of videos coming on his channel "Biricha Digital".
best snubber explanation! thanks. What if the flyback has multiple isolated output? what would be the N?
Thats a good question. We will check if we can find an answer. You could also measure the voltage on the switch directly since N is just used to calculate it from the reflected secondary.
Thank you for the very interesting video. I didnt know about thie reactance paper. Can it be used as well in the case of a double stage filter?
The principles should be the same, so it should be usable.
Hi sir, would you clarify me that how you have considered the value 2.5 to 5 in C clamp calculation,is any reference for that ???
In the video, the reference points to Basso's book: Switch-Mode Power Supplies Spice Simulations and Practical Designs". Please check there. Thanks!
@@OMICRONLabTutorials Thank you so much sir..
Hi sir,how to select the primary diode rating for RCD Snubber design..
Please contact Biricha directly for this question.
Thank you, Florian, for a very interesting video! I have a couple of questions. - At 9.20 you show two impedance plots. Is the blue one only a dream, or would it be realisable? How does it decrease the impedance seen by the load at the high frequency peak? - An interesting demo would be to use the Bode/Picotest combination on some real, third (or fourth) party PCBs to demonstrate the difference between a good and a poor PDN. - The formula introduced at 13.30 might need more explanation. - Would it be possible to make a (very delicate and expensive :) ) Kelvin-type probe with four needles, two for the excitation (current), and two for differential measurement of the voltage difference across the point of interest, e.g. a capacitor? The differential measurement would use both the input channels of the Bode. All three coax shields could by connected at the probe, so ground currents would still flow in the measurement cables, but as the difference is measured, this would not matter. Well, I am sure you tried this already :) - At 43:30 the impressive noise floor of the Bode 500 is shown. It is not clear to me how the voltage across the short is measured, with channel 1? - How important is it at higher frequencies, > 1 MHz, to have the PCB under test powered on? Looking forward to the next video from you, C
Hi! The blue curve at 9:20 is a simulation done by Picotest. It follows the "flat impedance approach". Steve Sandler is doing trainings on how to achieve this. I think the blue resonance peak is lowered by removing the low-impedance valleys. Thanks for the hint to the explanation of the 2-port shunt-thru formula. Regarding the noise-floor, the CH1 is not connected, the receiver 1 is routed internally to the signal source as a reference signal like in the S21 measurement. Powering on the pcb is important to see the dc-bias loss of ceramic capacitors when they are charged. For a more detailed discussion, please contact us via support@omicron-lab.com.
Just wonder if the filter character would change if you run DC supply through it , i mean, it shouldn't be biased with DC supply 12 volt , 10A to see how impedance would change . Maybe your inductance would be saturated with 10A.
Dear Paul, can you please get in contact with Günther directly? We don't know the technical details of his work.
Nice , very good sound too, good big ppt too. How did you choose value , is it from Dr.Ali shasvari video?
Dear Paul, can you please get in contact with Günther directly? We don't know the technical details of his work.
Haha did not expect that from the always sober lab so very clever 😅 can we buy the old units now!
LoL didnt about Dr's skills as a comedian! I hope his review is out soon
This is what the proud owner of a "Bode 100" writes: Really funny and well done!
Thank you for sharing.
Oops! Anyway are you going to release any records for the recent design symposium? I'm looking forward to it. I'd missed it.
Yes, the recordings should be online within the next few days.
Thanks!
@@OMICRONLabTutorials when you are going to make online,it's already been 10 days
@@biswajit681 They are live now: ua-cam.com/video/NF7Im0czXog/v-deo.htmlfeature=shared
@@OMICRONLabTutorials Many Thanks!!
No Dr. Ali was harmed 😅 I'm exited to this unit in action 😮
When you are going to upload this year videos?
As soon as we have prepared the recordings. It can take some days.
@@OMICRONLabTutorials Thanks for the response... please keep priority of Dr. Ali Shrishabar and Basso video
nice , دمت گرم هموطن
thanks for your nice explanation
can you help educate why there is no mirror of diode current on the return path? because it goes into inductor and change to inductor ripple current and mirrored to GND instead?
Great video. Good refresher.
This is one of the best videos explaining with simplicity current loops! Great and thank you for sharing.
Thanks! We will share your feedback with Dr. Ali.
Do you have a video on choosing injection point of multiple feedback systems like an opamp with multiple feedback?
Unfortunately not. As far as we know, in a multi-loop system all loops should be stable on each own. Best would be measuring each loop on its own if possible.
Dear Andeas. Which is the Magnitude, Phase, color? Your voice pitch as very low, therefore, sometimes, we can not understand some words. Regards.
Good introduction to a subject that is not known by a lot of engineers.
Is this for robotics?
Mostly for electronics. 🙂
Dumb question. Why just not to put a single diode across inductor so the power just dissipated in it? Every single amateur scheme have it😅
The RCD clamp does contain a diode that gets forward biased when the spike gets too high. Note that dissipating also impacts efficiency so the goal is to dissipate only as much as necessary to protect the switch.
@@OMICRONLabTutorials thanks, i'm learning, your lectures are very helpful
Stuart barrie scriven get outlook for Android Geoffrey
THAT WAS BANGING! THANK U SO MUCH
It can be used to test coupled coils used for wireless power transmission? like estimating the mutual coupling or coupling coefficient between the coils?
Absolutely. Please check out: www.omicron-lab.com/applications/detail/news/modelling-wireless-power-transfer-link