Questions tagged [common-mode-choke]
A type of choke in which two coils are wound on a single core in order to pass differential currents while blocking common mode currents.
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Common-mode choke in ECG circuit
I'm designing a PCB for single lead ECG measurement and I ran across this TI reference design that contains a common-mode choke (P/N Murata DLW31SN900SQ2L). What's strange is that I can't find any ...
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What is this SMD common mode choke?
A pair of components was accidentally destroyed on my Korg Volca Modular synth:
Through the magic of getting another identical synth, I was able to see how it is supposed to be on a working unit:
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Common mode choke rated current
I have ordered a common mode choke (https://product.tdk.com/system/files/dam/doc/product/emc/emc/cmf_cmc/data_sheet/30/db/ind_2008/b82721s0.pdf) to reduce the common mode noise available on the 5V DC ...
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Are common mode chokes really needed for Conducted Emission standards when there are only two terminals?
Common mode chokes make sense for power inputs when there are three terminals: power line, power return line and an "earth ground". You measure the noise of power line with reference to ...
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How to create schematic of common mode choke that reflect on Common mode, differential mode and mixed mode? [closed]
I aim to create a schematic that can replicate the results exactly as seen in the measured S4P file. I have conducted the measurement using a VNA and am attempting the schematic simulation in CST. ...
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Can a common mode choke be used to filter a SMPS dual power supply?
I have a switched mode dual power supply with +12V, GND and -12V outputs. I'm seeing a lot of high frequency noise on the output of this power supply that I'd like to attempt to filter out. The noise ...
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Current Rating in Common Mode Choke
What is the meaning of this current rating which says "unbalanced" current?
I know in common mode chokes the common mode current rating is given. Why here it is written as Iunbal.?
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How can I select a common mode choke for DC/DC power conversion stages
I want to attenuate 15 MHz noise signal using a common mode choke at 5 V power lines stage of a circuit that generate digital signals with less than 100Mhz.
When you use a common mode choke for a ...
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How are SPICE files created compared to S4P files generated from a VNA?
When measuring impedance versus frequency using the same data in both SPICE and S4P formats, why do I obtain different results?
COMMON MODE IMPEDANCE
Common mode impedance 10514 Ohm at 79.1 MHz
S4P ...
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LTspice parameters
I want to know how the .mod/.lib files in Ltspice are created by manufacturers. Let's say we have a Common Mode Choke (CMC). It will have some parameters as per its equivalent model at different freq ...
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Challenges in Bandwidth in Common mode Choke Modeling
I'm currently working on characterizing a common mode choke (CMC). However, I'm encountering difficulties aligning the bandwidth of my model with the measured results. Specifically, when I attempt to ...
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Why is a bandwidth discrepancy occurring despite consistent Q factors in the given Graph?
I was trying to do curve fitting the common-mode choke in CST Studio according to the selected S4P file from TDK (ACT1210G-800-2P-TL05).
However, the common-mode impedance measured from the file does ...
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Why my Common mode choke with 2 turns showing multiple Peaks in the graph?
I analyzed the CMC choke by Wurth Electronics (part no: 744830039080) using VNA and obtained the insertion loss for both common mode and differential mode.
The graphs match with the datasheet:
While ...
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Why is the core resistance modeled as 2*Rp and capacitance as Cp/2 in a common-mode choke?
I directed my attention to a paper regarding the modeling of common-mode chokes. Within this paper, the authors structured the circuit in such a manner that they designated the core resistance (...
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Choke Placement for POE top or bottom?
a colleague designed the pcb and I wanted to remove the bottom components and place them on top so that we may attach a flex pcb to the back side.
Attached is an image of the L3 choke, is there a ...
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