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  1. Replies
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    159

    Closed: Re: Convert rad^2/Hz to dBc/Hz

    in general, a measure in dB is 10 log (A/reference A)
    so things like voltage would be 10 log (voltage/reference voltage)
    and things like power would be 20 log(power/power reference)

    you must...
  2. Closed: Re: Netlist is different between schematic and layout

    what software are you using?
    LVS is an abreiviation i don't know

    if there is a drain source issue, it may be in the footprint of the part for the PWB
    or the connection between the pins of the...
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    777

    Closed: Re: Flyback Airgap Doubts?

    if i recall, cuk converters need to be individually tuned by gapping the
    inductor one at a time
    please forgive me if i remember incorrectly
  4. Closed: Re: How to analysis the loading effect of this kind of circuit?

    the capacitors are 15 nF and 100 fF or 15 x10^-9 and 100 x 10^-15.
    hardly what i would call huge.

    you're question is a little out of my expertise
    i expect someone will help out
    i will see...
  5. Closed: Re: How to analysis the loading effect of this kind of circuit?

    do you mean what load this circuit presents to the 2V-3V input?
    do you mean the load this circuit can drive?

    do you mean the capacitor on the read device is 100 farad?
  6. Closed: Re: Where to buy Electronics components in UK for domestic use?

    I usually have digikey, newark and jameco deliver to my house
    MOST of the time they will leave it on the front porch.
    (amazon, land's end, llbean etc also)

    when I had to pick up the package,...
  7. Replies
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    777

    Closed: Re: Flyback Airgap Doubts?

    not sure what changing the inductance will actually do, however, while the inductance is specified at 226 uH,
    there is tolerance on that of at least 10%, possibly more. (that essentially includes...
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    1,583

    Closed: Re: how to boost microvolts to higher voltages?

    data sheet page 2:
    Read absolute max ratings
    read note 1

    maximum supply voltage is +/- 18V to power supply pins
    +/- 4V is the smallest supply voltage the op amp will operate according to...
  9. Replies
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    1,583

    Closed: Re: how to boost microvolts to higher voltages?

    the supply rail(s) are the voltages you put on the +V power input and the -V power input
    that is, the inputs on the top side, +V and int input on the bottom side, -V

    your last diagram, in post...
  10. Closed: Re: The "cheap, quick and easy" way to do high power SMPS's?

    "1.2Kw (50vout and 24iout)" works fine if that's what you need.

    way back when I started engineering, there was a cartoon near one guy's desk
    cost, quality, schedule - pick 2.

    cheap quick and...
  11. Replies
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    1,583

    Closed: Re: how to boost microvolts to higher voltages?

    i see you put up a new sketch.
    please re-post with resistor values written next to the resistors and
    please put the pin numbers of the op-amp on the sketch.
  12. Replies
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    Closed: Re: how to boost microvolts to higher voltages?

    as i read your sketch, the power supply to the op amp is one battery.
    the batteries are in anti-series, with the top battery connected to the two power inputs to the op amp

    the batteries should...
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    345

    Closed: Re: How to wind toroidal coils?

    silly me
    commas are decimal points and decimal points are comas
  14. Closed: Re: 3-phase Δ-connected 11kV Open Circuit Fault Detection?

    get some good resistors to measure the line to line voltages

    resistor divider to provide a sample
    resistor and simple zener or transistor regulator to provide power
    simple optical emitter and...
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    345

    Closed: Re: How to wind toroidal coils?

    not sure i understand the question



    what is "7 thread"?



    sorry, not familiar with this notation - what does
    "1x1,2 mm"
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    Closed: Re: Interpretation of frequency of VCO

    which VCO?
    what does the data sheet say?
    what do the applicable ap notes say?
    there (likely) is at least one ap note with a sample usage. what does that say?
  17. Closed: Re: What can prevent two BT devices to connect successfully

    Headset (two ways audio with control) - a headset is a (one or two) speakers for the ears and a mouthpiece.
    the goal is to replace a telephone so ones hands are free
    the goal is also to let you...
  18. Closed: Re: Precision op amps - is 1 microvolt offset believable?

    its an Analog Devices part
    they've been making analog parts for a long time
    you can believe the data sheets

    follow the instructions in the data sheets and ap notes
    talk the the applications...
  19. Re: Is there any possibility of being able to clone or get a full copy of atmega 88?

    the atmega 88 microcontroller appears to be available for purchase
    ...
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    1,174

    Closed: Re: Who has experience using tube...

    every decision has its up side and its downside

    tubes are less susceptible to static discharge, EM Pulse, etc
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    986

    Closed: Re: Vicor Bus Converter module

    as FvM said, talk to the Vicor FAE
    the other thing is to build it and test it.

    try two matched units to see is screening and binning works
    try two severely mismatched units for worst case

    as...
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    Closed: Re: Vicor Bus Converter module

    if you can test Rout, then you can match them within a reasonable range.
    say, instead of 3 to 20, bin them in small steps
    3 to 6, 7 to 10, 11 to 14, 15 to 18, 19 to 20
    units within a range are...
  23. Closed: Re: High power SMPS's must have separate PCBs for the small signal stuff? (eg contro

    this is local culture
    products get built to meet form, fit, function and the local culture


    only a bad mechanical design allowed the "heavy power components" to bend the board enough to damage...
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    Closed: Re: Voltage and Current Measurement

    try these articles:

    from Analog Devices
    https://www.analog.com/en/search.html?q=An%20Inside%20Look%20at%20High%20Speed%20Analog-To-digital%20Converter%20Accuracy
    An Inside Look at High Speed...
  25. Closed: Re: Step Down Voltage Circuit at High Frequency (MHz)

    LED voltage drop is not constant. Putting them in series will yield a changing voltage drop.

    resistor divider with capacitor for frequency or capacitor divider are best bet
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