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Recent content by mdanaie

  1. mdanaie

    what's the differences between Accuracy and Precision?

    if you measure a variable n times and get identical results it is caleed accuracy but if the results are the same as reality you have percesion
  2. mdanaie

    Calculation of Q factor

    You shod devide the imaginary part of Z21 to the real part of Z(21)
  3. mdanaie

    Can I express BER in dB ?

    about BER BER is a function of SNR. You can express SNR in dB not BER.
  4. mdanaie

    Looking for information about Ultra WideBand

    Ultra WideBand?? Ultra wide band is usually more than 10GHz
  5. mdanaie

    please tell me about igbts

    Refer to H . Rashid for complete explanation
  6. mdanaie

    What's the maximum amount of current that 1 volt can supply ?

    what is voltage ? The voltage is the amount of engery needed to move a 1Q chrage from place a to place b
  7. mdanaie

    What is the value of electron mobility and oxyde capacitance

    electron mobility read the first chapter of razavi or streetman
  8. mdanaie

    IEEE conference schedule?

    I'm looking for a website which contains IEEE conference lists related to photonic crystal or optical communicaion with regard to their deadlines. Could anybody help me please:?:
  9. mdanaie

    Is the PIER journal and ISI journal?

    I'm going to submit a paper to pier. Could anybody tell me whether it is an ISI jpournal or not? (how much is its impact factor?)
  10. mdanaie

    Distributed Control System

    they are not new. they were first studied in 1990
  11. mdanaie

    calculation of RF antenna height

    It depends on the tpye of your antenna ( spiral, log periodic, dipole, parabolic) for dipole antennas lambda/2 is enough lambda=C/f where c is the speed of light and f is the frequency you do the calculation by yourself
  12. mdanaie

    Neural network - prediction. How?

    neural network prediction The answere is so tricky The best answere is to use 2 input nural network the first input is your data taken each 10 minutes. for the second input use the same data with 10 minutes delay. It means you have a Z^-1 feedback from output to input making the nural network...
  13. mdanaie

    Ground plane under IC

    because it 1)absorbs heat and protect the circuit from overheating 2) Protects the circuit from environmental radiations
  14. mdanaie

    waveguide mode... question maybe easy

    count the zeroes in each direction. Either of E or H may become zero in x y or z direction ( the number of these nodes spesifies the mode in xyz format)
  15. mdanaie

    resistor trimming in voltage reference

    about 100ppm/ C refer to bandgap reference circuits

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