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Type: Posts; User: FvM

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  1. Closed: Re: NFC Antenna Design to radiate strong field strength

    The field strength of a circular coil can be easily calculated using Biot-Savart's law. See https://www.edaboard.com/showthread.php?387563-ELF-antenna-and-transmitter-design.
    The axial field...
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    [SOLVED]Closed: Re: ACS712-5A AC Current Reading - How to?

    The code should work, but measuring peak-to-peak current magnitude is sensitive to waveform distortions and noise and in so far the least accurate way to measure AC current.
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    Closed: Re: Single and Polyphase Power Management IC

    ADE7878 is not recommended for new designs, ADE7878A ist the recent type.

    I agree with KlausST. You need a poly phase energy meter IC to support 3-phase measurement, there's no reason why it can't...
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    Closed: Re: High Input Current DC-DC Converter?

    If isolation required, LLC converter, otherwise multiphase synchronous boost.
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    Closed: Re: Resonant Converter Simulation Problem

    Make the total load impedance inductive to achieve zero voltage switching and reduce switching losses. General consideration about LLC operation modes apply.
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    Closed: Re: How to Measure Creepage Distance

    pin-to-pin seems pretty easy, use a ruler or measure in 3D-model

    Find some consideration about heatsink creepage in Infineon AN2012-10...
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    Closed: Re: How to Measure Creepage Distance

    There are several creepage paths involved with TO220, e.g. pin-to-pin, at the case and at the PCB, heatsink to tab, etc.

    Can you ask more specific?
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    Closed: Re: Resonant Converter Simulation Problem

    I think you are mixing several topics.

    - An induction heater may use a parallel capacitor to compensate the low coil inductance (air coil or coil with large air gap)
    - To convert the output...
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    [SOLVED]Closed: Re: fixed point arithmetic in c

    Not when represented with long data type as in post #12.
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    Closed: Re: Design a system clock monitor in verilog

    Yes, using an auxiliary clock, e.g. built-in FPGA RC oscillator.

    Usually a clock monitor makes only sense if you have second clock you can switch to.
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    [SOLVED]Closed: Re: fixed point arithmetic in c

    b=65535 is outside Q1.15 (int16) range. Should be -1.
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    Closed: Re: Resonant Converter Simulation Problem

    How do you determine resonant frequency? Resonant converter can be hard switching series resonant LC converter or better soft switching LLC converter. Resonance frequency is mainly determined by the...
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    [SOLVED]Closed: Re: fixed point arithmetic in c

    Apparently you don't scale the multiply result correctly.
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    Closed: Re: Switch +/- 15v supply for audio preamp

    Do you need isolation between SPI and supply switches? If not, there are simpler solutions than optoMOS.
  15. Closed: Re: $freq while using AC analysis to access lookup table

    Forgot to mention the circuit analysis tool.
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    [SOLVED]Closed: Re: DC-to-DC Converter question

    The circuit is rather unclear because you are showing less than half of the DC/DC pins. Each converter has two input and three output pins.
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    Closed: Re: Determining output impedance in LT SPICE

    See below an example of plotting transistor capacitances over Vds in Ltspice.

    156582
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    Closed: Re: Enabling PLL in PIC18F

    Im under the impression, you are trying to drag on the thread without ever looking into the 18F2550 datasheet…

    Simply notice that the PLL has fixed 96 MHz frequency. Possible CPU clock frequencies...
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    Closed: Re: Functionl Generator 600 MHz

    Please some more snippets of specification. Waveform, rise-/falltime, pulse width, magnitude, just to mention a few parameters.
  20. Closed: Re: Multiple pulse width ( 5 pulses ) inverter and lowest low order harmonics

    Yes, exactly.
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    Closed: Re: Using AD831 in parallel

    RF should be ok then.
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    Closed: Re: Difference circuit not acting as expected

    Looks like single supply OP in saturation.
  23. Closed: Re: Multiple pulse width ( 5 pulses ) inverter and lowest low order harmonics

    Sorry for lack of clarity. r1,f1 etc. are the edge times (rising 1, falling 1,...) in rad. To get the full picture, you should review the original Excel table from post #9. You can also try...
  24. Closed: Re: Multiple pulse width ( 5 pulses ) inverter and lowest low order harmonics

    The emphasis of the presented results is on the feasibility of harmonic cancellation over a certain magnitude range. I'm assuming that this solution, if achievable, is also unique.

    Because the...
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    Closed: Re: Using AD831 in parallel

    Crystal oscillator output has DC bias of Vcc/2, RF in bias is unknown. Where is it connected to?

    Use capacitor to clock oscillator DC bias. It's also unclear if the oscillator can drive 2x50 ohm...
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