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    Closed: Re: Coupled inductors for filtering

    Ok I may have made a terrible choice of common mode choke for comparison:
    https://www.coilcraft.com/msd1260_cm.cfm
    12x12x6mm/2.5A is only 10uH

    This part can be easily matched with individual...
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    Closed: Coupled inductors for filtering

    What are the tradoffs to consider when deciding whether to use coupled differential mode, coupled common mode or discrete inductors for filtering in AC applications.

    For example below is the...
  3. Closed: Re: LTspice...splitting LT1243 output into two separate pulse streams

    You're just driving a half bridge from a signle PWM output and need to insert dead time?

    Why not use the age old R+diode circuit. Add an R for turn on which is bypassed by a diode for instant...
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    Closed: Re: How many devices can we have on SPI?

    The read/write bit reduces the address to 7 bits.
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    Closed: Re: How many devices can we have on SPI?

    As others have said as many as you want but SPI doesn't scale that well since you (typically) need individual CS lines for each device. Though SPI GPIO expanders could be used to help address this.
    ...
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    [SOLVED]Closed: Re: Metastabilty and data loss

    Yes. Even with a syncronizer if bits are sampled as they're changing you'll randomly end up with either the old value or the new value.

    In a multi-bit vector you can end up with a mix of old bits...
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    Closed: Re: Spikes in output voltage in Buck Converter

    "it is just as likely your scope is picking up common mode impulses"

    Yes what Easy said. I just started typing exactly these words.
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    Closed: Re: Inrush current limiter

    For 24V you may be best off with a current limiting IC, or 'load switch' or 'soft start controller'.

    FPF2700 is one example in this category.

    It's also possible to use a simple discrete...
  9. Closed: Re: Opamp buffer with 400nF output capacitance going unstable?

    The 4.7R may be doing its job then. You could short its output and watch it recover - a simple step response test to get a sense of stability.


    I'll say that this isn't theoretical. I've...
  10. Closed: Re: Differences between the Artix 7 xc7a35tcpg236-1 vs Stratix III EP3SL150F1152C2 FP

    I think we've had this discussion before but for the midrange designs I do I much prefer Vivado and its full integration (FPGA is about 1/4 of my job).

    I took an Altera design for the first time...
  11. Closed: Re: Differences between the Artix 7 xc7a35tcpg236-1 vs Stratix III EP3SL150F1152C2 FP

    #4 is often #1.

    Would you generally agree that Altera/Intel and Xilinx are fairly similar in the midrange? On the low end Xilinx doesn't compete with MAX10 and on the high end Altera's SOC is...
  12. Closed: Re: Seeking: 3400uF 50VAC or greater low loss, tan-delta < 0.01 say

    I don't really know what space this is in, frequency etc. I'm assuming mains.

    They do make bipolar electrolytic though I'm not clear if they're suited for continuous AC use or not....
  13. Closed: Re: Opamp buffer with 400nF output capacitance going unstable?

    You can handle 'a bit of sinking' with just a pull down.
  14. Closed: Re: Opamp buffer with 400nF output capacitance going unstable?

    Among the various C load compensation schemes your R scheme is about the simplest. The reference I linked has some equations to verify stability for your R scheme (which apply if the C load is well...
  15. Closed: Re: Opamp buffer with 400nF output capacitance going unstable?

    See this document for many strategies to compensate for C loads. The "In-Loop Compensation" is nice as it adds no error (this is what dick was describing)....
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    Closed: Re: How to achieve Vref changing with Vdd

    We can’t help unless you provide the relationship you need between “vref” and “vdd”. If you don’t know post your circuit schematic.

    Common possibilities: you need a fixed difference in which...
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    [SOLVED]Closed: Re: DC-to-DC Converter question

    Using a DC-DC converter output as your reference is probably a poor choice because its noisy and poorly regulated. It's also wasteful to cascade DC-DC converters (especially isolated ones) unless...
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    [SOLVED]Closed: Re: type 1 compensation in voltage regulators

    Correct. The compensator is a part of the total system that includes DC feedback.
  19. Closed: Re: What is saturation current of ELC09D-221 (220uH) inductor?

    Reference the L vs I curves on page one. Saturation is usually defined as a 20-40% drop in inductance.

    EDIT: Nevermind that appears to be a part selection guide. I've also never seen an inductor...
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    Closed: Re: How to generate sine wave using Verilog?

    Consider that the derivative (slope) of sin is cos and the derivative of cos is sin. Thus you can increment one by a value proportional to the other and you get a self-oscillating output that's a...
  21. Closed: Re: "Current" controle is a big issue using ClassD ?

    Well it seems the OP wants to control current: "Since my project need to get Current transformer output"...and current mode control is a great way to do that.

    Generally current mode control...
  22. Closed: Re: Reverse recovery losses in synchronous rectifier

    This also won't answer your question: What I think is that it doesn't matter too much. The future for a mostfet that's on is that some day it's going to be turned off. At that point any positive...
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    Closed: Re: Dc/Dc controller LT8316 power limit

    To be clear I don't think there is a 100W limit. The 100W number is Analog/Linear trying to be realistic and helpful (and they sell controllers better suited for higher power).

    12V is fine for...
  24. Closed: Re: Longer deadtime or blanking time between two mosfets of one leg phase U or v or w

    Speaking with class-D/inverter experience but not motors: yes dead time creates distortion. When neither fet is on the result may be high, low or somewhere in between. The uncertainty creates...
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    Closed: Re: Dc/Dc controller LT8316 power limit

    100W is often considered the upper useful limit for a flyback.

    Flybacks make relatively poor use of the transformer meaning its size increases quickly with power. Around 100W other topologies...
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