Search:

Type: Posts; User: FvM

Page 1 of 20 1 2 3 4

Search: Search took 0.20 seconds.

  1. Replies
    3
    Views
    92

    Closed: Re: Pulse distortion after amplification

    Good idea. I guess you have input or output AC coupling and the bias point is shifting when the input signal is rectified in saturated operation.
  2. Replies
    3
    Views
    101

    Closed: Re: How good is ultiboard?

    Firstly I'd like to hint to a sticky thread on top of this forum https://www.edaboard.com/showthread.php?18145-Stop-the-is-xxx-software-is-better-than-xxx-software-topicz

    It makes a necessary...
  3. Closed: Re: Power harvester evaluation board and antenna issues

    Are you serious? Using an amplifier with energy harvesting? Did you understand the basic idea?

    - - - Updated - - -

    Energy harvesting is intended to supply ultra low power systems from a power...
  4. Replies
    7
    Views
    290

    Closed: Re: Lets take a look on a linear amplifier

    There may be good reasons to implement a linear (class AB) amplifier for your purposes, I don't apply to decide yes or no.

    You have implicitly specified amplifier output voltage and current by...
  5. Closed: Re: In distributed amplifiers, is it total input capacitance of the gain stage or Cgs

    Seriously, does the discussion about terms help in any way to answer the original question?

    Does the term "artificial transmission line" clarify anything compared to "LC delay line" (my favorite...
  6. Replies
    41
    Views
    1,006

    Closed: Re: Extracting energy from gyroscope precession

    The swing example is inappropriate for the original gyroscope problem. Swing involves periodical transfer between potential and kinetic energy. Work is done by weight shift which dynamically changes...
  7. Replies
    1
    Views
    150

    Closed: Re: Adapter design for pressure sensor

    Doesn't sound bad in general, but some details aren't quite clear. Do you mind to share a CAD drawing of the intended sensor mount?
  8. Replies
    11
    Views
    221

    Closed: Re: Operational amplifier driving capability test

    The described setup (setting a fixed output voltage) doesn't fully test "driving capability", you want to evaluate the available output current over a defined output voltage range.
  9. Closed: Re: Problem adding reset to master slave D-FF for phase detector

    In a regular master slave FF, the asynchronous reset signal is expected to immediately reset both stages independent of the clock state, that's what we apparently see in your waveforms, although they...
  10. Replies
    11
    Views
    781

    Closed: Re: Cheap Mains harmonics tester

    Individual harmonics have different limit values. THD isn't enough.

    As for the general question, FFT is supported by most modern digital scopes. If you leave some margin to limit values, the...
  11. Closed: Re: Higher Current Consumption than expected with AFE and embedded Flash

    Hard to give less information…

    Where do you see the current peak and when? You should be able to trace the current path down to the component generating the peak.
  12. [SOLVED]Closed: Re: Suppressing the spacing in $fwrite command of Verilog

    Review System Verilog language reference, paragraph 21.2.1.3 Size of displayed data.

    It's regular C format specifier syntax, by the way.
  13. Replies
    26
    Views
    761

    [SOLVED]Closed: Re: IGBT Overshoot and Weird Slope

    It depends. Some thermal pastes with high thermal conductivity are metal filled and also electrically conductive. But as far as I can see from the photo you have separate heat sinks for each IGBT. So...
  14. Replies
    2
    Views
    157

    [SOLVED]Closed: Re: AMS simulation of D-FF

    There's no clock signal fed to your circuit, respectively output is uninitialized..

    Confusingly you are providing a multi level ("electrical") signal to the D input which makes no sense for a...
  15. Replies
    8
    Views
    406

    Closed: Re: Antenna pcb in commercial key fob

    The order of magnitude sounds reasonable. Obviously the numbers have been empirically validated, but your antenna geometry may be different.

    You can try different inductance values and measure the...
  16. Replies
    26
    Views
    761

    [SOLVED]Closed: Re: IGBT Overshoot and Weird Slope

    Adjustment is either at the probe or the probe connector. Why don't you read the manual?
  17. Closed: Re: Is there possibility to force a filter topology in DA_LClowpassMatch in ADS?

    frdm90 didn't yet release a matching bandwidth specification. I presume, it's not possible to achieve a higher bandwidth with LC network for the example matching problem.
  18. Replies
    26
    Views
    761

    [SOLVED]Closed: Re: IGBT Overshoot and Weird Slope

    Besides unsuitable probe connection it may be dropping DC supply. I won't care about it much. Overshoot is much more a problem. It probably kills the IGBTs if you connect high input voltage.

    To...
  19. Replies
    26
    Views
    761

    [SOLVED]Closed: Re: IGBT Overshoot and Weird Slope

    How can you measure with different ground connection for blue and yellow trace simultaneously? The real circuit must be somehow different.

    - - - Updated - - -


    Disconnecting the...
  20. Replies
    26
    Views
    761

    [SOLVED]Closed: Re: IGBT Overshoot and Weird Slope

    No. I referred to the isolation capacitance, e.g. the transformer interwinding capacitance. The linear voltage regulator circuit is O.K. But it's not so good to have the power supply and transformer...
  21. Replies
    14
    Views
    2,132

    Closed: Re: SRF of filter inductors in offline SMPS

    O.K., you can tune a diff mode filter to reject a particular frequency, at cost of wideband suppression. If it helped in a special case, it's surely no reasonable general suggestion.
  22. Replies
    26
    Views
    761

    [SOLVED]Closed: Re: IGBT Overshoot and Weird Slope

    There's no DC bus in a "direct converter", which constitutes already some of the circuit problems.

    It's not clear where you measure the "IGBT output". Why we see a negative pulse although the...
  23. Replies
    14
    Views
    2,132

    Closed: Re: SRF of filter inductors in offline SMPS

    Part of your points have been already discussed in the previous thread.


    Surely not. A choke has maximal impedance at it's SRF, respectively maximal isolation of the interfering frequency.

    100...
  24. Closed: Re: Problem adding reset to master slave D-FF for phase detector

    I don't understand what you consider "wrong" in the posted simulation waveforms. I don't recognize missing pulses or similar artefacts. Please clarify where exactly you see a problem.

    I presume...
  25. Replies
    41
    Views
    1,006

    Closed: Re: Extracting energy from gyroscope precession

    Sure, but the problem is at least of theoretical interest. Kajunbee's empirical observation that braking the precession slows down the gyro rotation can be substantiated by the theory of gyroscopic...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4