Recent content by MrBondx

  1. M

    Triac - Power dissipated in light bulb

    Thanks for the pointer. I guess i didn't subtract the lower limit from the the upper limit [325.2692 / (2π x 529)] x [ intergral with upper limit] - [ intergral with lower limit] 31.83 x (2.8345 - 0.3071) = 80.45 Thats it, isn't it? Thanx gneill
  2. M

    Triac - Power dissipated in light bulb

    Thanks gneill Here it is: [V2 / (2πR)] x [ ½ (θ - (½ sin 2(θ)))] [325.2692 / (2π x 529)] x [ ½ (5π/3 - (½ sin 2(5π/3)))] 31.83 x [ ½ (5.236 -( - 0.433))] 31.83 x 2.8345 90.2
  3. M

    Triac - Power dissipated in light bulb

    Hi guys I'm getting same as this but if I multiply with 31.83 that I am getting from (3.0086 x 10^-4) * 325.32^2 My answer is 89.9. Just wondering why my answer is off. Please help Thanks
  4. M

    50 Hz High-Voltage Transmission Line

    Hi just wondering how you got to have Z1 = 26.26 + j96.52 I did Z1 = VS / IS I'm getting Z1 = 26.26 - j644.75 What am I doing wrong?
  5. M

    How Do NEXT and FEXT Impact Signal Integrity in PCB Transmission Lines?

    Homework Statement For a lossless line: The characteristic impedance is given by Zo=sqrt(L/C) and the velocity of propagation by Vp =1/(sqrt(L*C)) where L and C are, respectively, the line's inductance and capacitance per metre length. A transmission line is formed by two identical parallel...
  6. M

    Maximum Source Resistance for Optimal ADC Performance

    I hope it is correct, will send it for marking. Thanks for your help, much appreciated.
  7. M

    Maximum Source Resistance for Optimal ADC Performance

    Converting Celsius to Kelvin 25degrees = 298.15 K Plugging numbers into equation Rn = (38.15 x 10^-6)^2 / (4 x (1.38 x 10^-23) x 298.15 x 1000000) = 88433.17 Rn = 88.4 kOhms
  8. M

    Maximum Source Resistance for Optimal ADC Performance

    :smile: Input voltage resolution 18bits = 2^18 steps = 262144 Voltage range / steps = (10 / 262144) Vn = 38.14697 x 10^-6 V Is that correct?
  9. M

    Maximum Source Resistance for Optimal ADC Performance

    Thanks, Yea my mistake Vn = sqrt(4kTBR) Re-arranging R = (Vn^2 / 4kTB)
  10. M

    Maximum Source Resistance for Optimal ADC Performance

    Homework Statement A simplified model of ADC noise refers the noise to a noisy source resistance Rn while assuming the rest of the signal path to be noiseless. Figure 3 represents a particular 18-bit ADC that has a 10 V input voltage range. The ADC has a bandwidth of 1 MHz. Calculate the...
  11. M

    Voltage Regulation transformer

    Thanx, Yea I had done that but my answer is coming out as negative value. Is that correct?
  12. M

    Voltage Regulation transformer

    Is it correct to then say Reflected = Rsecondary + (Rprimary / n^2) Where n = (N1 / N2) Which gives me RS = (0.007 - (0.010 / n^2) Problem is I've failed to lose n^2 so I'm left with numerals only
  13. M

    Leq = (L1*L2-M^2)/(L1*L2-M^2)Hope this helps

    Got this question sorted, thanks anyway.
  14. M

    Leq = (L1*L2-M^2)/(L1*L2-M^2)Hope this helps

    For (a) isn't V supposed to become negative when it goes to the other side of the equal sign. Or what am I missing?
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