Search:

Type: Posts; User: FvM

Page 1 of 20 1 2 3 4

Search: Search took 0.34 seconds; generated 37 minute(s) ago.

  1. Replies
    3
    Views
    119

    Closed: Re: Step Cieling fan regulator using Triac

    Suggest you get self-triggering of opto triac or main triac by high dv/dt. That's likely to happen with inductive load, RC filters for the opto triacs are suggested. Refer to application circuits for...
  2. Closed: Re: Configuring ICE40 FPGA directly from ESP32 uC rather than using dedicated flash I

    "Slave SPI mode" in the configuration manual refers to operating the uC as SPI master and ICE40 as slave which is most likely the easier way.
  3. Replies
    1
    Views
    88

    Closed: Re: Seeking wiring advice for Wifi router

    You are apparently misunderstanding things. The WiFi adapters have two antenna ports for diversity purposes, each coax cable will be connected to a reverse SMA jack and an antenna. If you have only...
  4. Replies
    9
    Views
    390

    Closed: Re: Oscillations dying out

    1. You can verify by checking the loop gain.
    2. Choose initial conditions that result in a start magnitude below steady state. You'll see a rising magnitude at the start.
  5. Replies
    8
    Views
    257

    Closed: Re: L1 and C1 value for EMI filter design ?

    As explained cariban, C1 and L1 aren't directly related, respectively there's no forumula linking the values.

    For L1, I would use a low current common mode choke like this...
  6. Closed: Re: Remove glitches in output frequency of ring oscillator

    What we see in post #1 is not jitter. It's an unstable oscillation mode.

    Apart from the question it's a real hardware effect or a simulation artefact, what's the purpose of increasing the number...
  7. Replies
    8
    Views
    257

    Closed: Re: L1 and C1 value for EMI filter design ?

    Why 4.7 uF, why not 47 nF or 470 nF? You didn't yet specify any application parameters.
  8. Replies
    17
    Views
    780

    [SOLVED]Closed: Re: LoopGain analysis with multiple feedback loop

    Sure, due to series-shunt feedback working.
  9. Closed: Re: LLC converter vs Dual cascaded Buck….1000V to 48V at 500W output…no isolation ne

    The current spikes are caused by D3 snap-off. The diode is completely useless.
  10. Replies
    6
    Views
    190

    Closed: Re: push pull ac-dc auxiliary winding.

    Yes, that's what Easy peasy suggested.
  11. Replies
    6
    Views
    190

    Closed: Re: push pull ac-dc auxiliary winding.

    Using the winding only to power the feedback opto coupler doesn't make sense.

    But I presume you can read schematics good enough to see that the driver power supply is not shown in the drawing....
  12. Replies
    1
    Views
    199

    Closed: Re: 10Gb/s data over gigabit Ethernet port

    No. MAC and PHY must be designed for 10 Gbps.

    10GBASE-T (10 GBPS ethernet over RJ45 cables) hardware is yet expensive. Unlikely to be found in a garden-variety PC.
  13. Replies
    8
    Views
    257

    Closed: Re: L1 and C1 value for EMI filter design ?

    It depends. On the interference frequencies to be filtered, the device power, etc.

    C1 47nF up to several µF
    L1 is sketched as a common mode choke, common mode inductance 100 µH - several 10 mH,...
  14. Closed: Re: Remove glitches in output frequency of ring oscillator

    It's usually expected that a RO oscillates at the lowest possible frequency with a period equal to twice the gate chain delay, without a frequency selective circuit.

    I'm not sure if the assumption...
  15. Replies
    6
    Views
    277

    Closed: Re: Wht is the purpose of this op amp

    You know what the load impedance is, we can't determine if the lower driver impedance is actually necessary.
  16. Replies
    3
    Views
    246

    Closed: Re: How can I measure the Side-Band Amplitude?

    You can either calculate the side band to carrier magnitude ratio based on the used modulation index or measure the magnitudes with a spectrum analyzer. Modulation index is different for 106 kbps and...
  17. Replies
    8
    Views
    288

    Closed: Re: Microcontroller selection - higher baud rate

    You might look for newer 18FxxKyy series that can achieve 64 MHz clock with internal oscillator and PLL. They support 115k or even higher baud rates. Please consider that internal oscillator has...
  18. Closed: Re: AVR Soft-Core (ATMega103) - issues during synthesis and implementation

    No good suggestion, IMHO. I'd stay with forum rules in this regard:


    The idea is to keep the question context and support forum clearness.

    I agree that a blog might be appropriate for the...
  19. Replies
    17
    Views
    780

    [SOLVED]Closed: Re: LoopGain analysis with multiple feedback loop

    Many possible reasons. It's useless to guess about it without the actual simulation circuit and component models.
  20. Replies
    6
    Views
    293

    Closed: Re: Power Oring Using Mosfet

    Why are you telling this now? There's no information about a charging circuit, it's operation principle and how it's connected in your posts up to now.

    You should either tell the full complete...
  21. Replies
    3
    Views
    246

    Closed: Re: How can I measure the Side-Band Amplitude?

    Which modulation do you want to measure? Reader or tag generated? Why sidebands separately? No SSB involved with NFC.
  22. Replies
    9
    Views
    544

    Closed: Re: BJT amplifier design

    I don't think that the problem specification is implemented appropriately. The 50k resistor is useless, the collector current flows almost completely through RL.

    Where is the load resistor...
  23. Replies
    5
    Views
    377

    Closed: Re: STM32F103VET6 and CH340G

    CH340G 3.3V bypass capacitor missing.
  24. Closed: Re: Need information about related application to power electronics

    The linked thyristor controller is for heating control and won't work for AC motors. These days most small and medium size AC motors (e.g. up to 100 or 200 kW) are controlled by VFD inverters if...
  25. Replies
    9
    Views
    544

    Closed: Re: BJT amplifier design

    Apparently from the same course, but a considerably different problem.

    I presume that the solution can be elaborated based on the course material, which we unfortunately don't know. Thus the...
Results 1 to 25 of 491
Page 1 of 20 1 2 3 4