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Recent content by venn_ng

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    How do you simulate or define DNL/INL for a 1-bit Delta Sigma ADC for a dc input

    Hi, I am wondering if it makes sense to define a DNL/INL for a 1-bit delta sigma ADC (1-bit comparator) for a DC input? Since the data is processed after a digital filter and we could have a ±1 LSB error (meaning if the input is like 1LSB + Δv, we could have 1LSB or 2LSB at the output of...
  2. V

    Why do we have drilled holes along an RF signal trace on PCB?

    So it's like a ground shied on top/bottom + sides?
  3. V

    Why do we have drilled holes along an RF signal trace on PCB?

    https://www.digikey.com/product-detail/en/texas-instruments/ADC-WB-BB%2FNOPB/296-37483-ND/3902081?gclid=CjwKCAjw_NX7BRA1EiwA2dpg0glDzfkCp4sBc_vjsCZB0f8NYpcRie0XuX0l8OYPdrDvKdaa2sLSRRoCwC4QAvD_BwE#images If you take a look at the image of this product, you can see there are drilled holes along...
  4. V

    Direction of Magnetic field

    Magnetic field always has a loop. This comes from maxwell's equation V.B =0. (V is the gradient operator) This equation says that divergence of magnetic field is 0. This means, there is always a loop. I think in this case, it goes through the south pole and returns back to the north pole again
  5. V

    Switched capacitor stb simulation issue

    I am able to make DC converge by placing a 1G resistance in the feedback path (parallel to C2). How would you suggest to run stability checks on a switched cap circuit like the one I have?
  6. V

    Switched capacitor stb simulation issue

    Hi, I am trying to run stability sims for a switched capacitor op-amp circuit as shown. I tried both ac and tran stb (not evaluated pstb yet). I observe that in some corners, the frequency spectrum @ low frequencies (<10kHz) has weird issues. Do you know what is causing this and how to solve...
  7. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    Nope that's resistance
  8. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    I meant, people tend to think that having parasitic inductance will screw up the performance, which is not the case. You can't look at it the same way as you look at a resistance.
  9. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    Ok that makes sense. So basically, you are saying that the surface area is increasing as the diameter is increasing and hence the current / Area drops as 1/r as 'r' is increased and this, in turn, drops the magnetic flux B. Is my interpretation correct?
  10. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    Just don't call it resistance...Resistance dissipates energy in the form of heat, inductance stores energy..It's just a misnomer, can be misleading. People tend to think that inductance is bad, which is not sometimes.
  11. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    Thanks for the reply. I appreciate it. Why does the self-inductance drop with increase in width? Can you explain me in terms of magnetic flux?
  12. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    In the end, what matters is the total loop area, right? Isn't it the same in both the cases?
  13. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    Yes, precisely the measure of magnetic flux and not some tendency to oppose current, which is unfortunately a misnomer and people are taught that way in school. My question is in the case of parallel traces, the distance between them is still the same ('H' in this tool...
  14. V

    [SOLVED] Why does the inductance reduce with increase in width of a transmission line?

    I was playing with this tool https://www.eeweb.com/tools/broadside-trace-inductance I observe that the inductance drops with increase in width of the metal. Doesn't the total loop area remain the same regardless of increase in width? I am not sure why the inductance has to drop with increase...
  15. V

    Capacitor with initial values

    Exactly, is there a closed form expression after t=t1, based on initial conditions? 1595454376 lol yeah. I was breaking my head too on this ;)
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