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Recent content by HighTechPower

  1. HighTechPower

    Dual polarity SMPS currents and voltage control loop design

    Why I'm supposed to attach whole schematic here? Is this forum meant to teach novice people? and are you novice that you need full schematic to understand? and I already have labeled the simulation properly. Similarly I find people sometimes behaving as they are more superior people, maybe I...
  2. HighTechPower

    Dual polarity SMPS currents and voltage control loop design

    Hi guys. I'm designing a +80V & -80V dual polarity SMPS with current sense resistors on high sides. The simulation file is doing perfect and figure is attached herewith. I followed application note (slup114) that I used to design current control loops as shown on it's page 22/23. However when...
  3. HighTechPower

    Quad single supply opamps that can handle negative input voltages

    I want to find an opamp which has better performance than LM324 if offset is applied. Will MC34074 fulfill that purpose?
  4. HighTechPower

    Quad single supply opamps that can handle negative input voltages

    1) Differential, diagrams not drawn yet 2) 2.5 gain 3) Perhaps -7V to -9V 4) 5V output 5) BW not critical 6) Load around 10mA 7) DC current on negative rail Supply voltage +12V to 0V single supply 1711199945 I prefer not to add any offsets so want to confirm if MC34074 will work fine for this job?
  5. HighTechPower

    Quad single supply opamps that can handle negative input voltages

    Hi Crutschow, Is not it true that MC34074 can operate with negative input voltages while in single supply mode without using offsets? Plz see attached datasheet. This is what it says on first page, "Although this series can be operated from split supplies, it is particularly suited for single...
  6. HighTechPower

    Quad single supply opamps that can handle negative input voltages

    Thank you guys, I have learned how to implement negative input voltages by applying offsets for single supply quad opamp. However would like your suggestions that is there any better opamp than LM324 in terms of better results while applying offsets in SOIC-14 package? The single supply working...
  7. HighTechPower

    Quad single supply opamps that can handle negative input voltages

    Hi KlausST. I have not drawn any diagram yet. However I know that voltage at noninverting and inverting input will be -10V and -12V respectively
  8. HighTechPower

    Quad single supply opamps that can handle negative input voltages

    Hi guys. I have to make a circuit utilizing a quad single supply opamp which can handle negative input voltages at least up to -12V. Any idea which easily available quad opamp supports this function. The supply voltage is +15V (pin4), 0V (pin11).
  9. HighTechPower

    COMSOL Multiphysics Simulation for 2 Wheeler Maglev

    Hi guys. I'm simulating a motorbike type maglev in COMSOL. However it's not showing 2 wheels rotating in animation. Plz find below the link to download file, https://we.tl/t-fq6uoOSfY8 Any idea whats wrong with it. Actual idea was taken from single wheel from the link below...
  10. HighTechPower

    [SOLVED] Updating all footprints in Altium from footprints library without displacing components on PCB

    Thank you FvM & barry, I reset the origins & issue solved for most of footprints, however as some components with same footprints had references at pin 1 and some at origin so I had the only choice to readjust others manually.
  11. HighTechPower

    [SOLVED] Updating all footprints in Altium from footprints library without displacing components on PCB

    Yes I changed the origin of some footprints from center position to pin 1 once (I don't remember exactly for which footprints I did that). But now how to tackle the issue if I don't revoke the origin to earlier state. I updated components origin (from center to pin 1) in library from another...
  12. HighTechPower

    [SOLVED] Updating all footprints in Altium from footprints library without displacing components on PCB

    Hi guys. I'm designing a simple 2 layers PCB. I have routed the board. Now due to some issues & to make sure that PCB is updated with latest changes done in footprint library, I used the command 'Update PCB with All' and though it updated, a new issue rise up. I mean it displaced some components...
  13. HighTechPower

    Electromagnetic design softwares for model maglev train

    I'm not simulating for electromagnetic compatibility or interferences as primary objective. I want to see sliding maglev train engine (for simplicity in some block form) in 2D and 3D as per given parameters, like number of turns, operating frequency, voltage type and level applied, flux density...

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