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Recent content by Zander_ua

  1. Z

    transformer coupling co efficient in agilent ADS momentum

    See my ppt http://www.home.agilent.com/upload/cmc_upload/All/Klymenko_IHP_UWB_Rx_FrontEnd.pdf page 13.
  2. Z

    transformer coupling co efficient in agilent ADS momentum

    Z=stoz(S,50) Y=stoy(S,50) k=mag(sqrt((1/Y(1,1)-Z(1,1))*Z(2,2)/imag(Z(1,1))/imag(Z(2,2))))
  3. Z

    how to write a verilogA code to generate a voltage source?

    Re: how to write a verilogA code to generate a voltage sourc Not a problem. Now much are you ready to pay?
  4. Z

    How to plot data in ADS?

    Re: Data import to ADS Hi! Just Convert your data to descrete format - put your values in BEGIN DSCRDATA % var_name1 var_name2 .... END - name the variables you need and call them out like : file{DAC1, "var_name_in_descrete_file"}
  5. Z

    Differential noise figure measurements

    I have baluns from 2 to 18 GHz - but they are, by itself are active circuits - so NF is not an option to measure in such way((. Thanks anyway!
  6. Z

    Differential noise figure measurements

    Hello! Can you recommend me some literature on differential noise figure measurement techniques? I need to measure differential LNA. Thank you.
  7. Z

    Differential vs. Quasi_Differential design?

    Hi all, Can you help me to define the main advantages and disadvantages in differential and quasi differential design? I mean, for example, if there is a differential bipolar amplifier and: 1) its emitters are connected to ground, doesn't matter if there is any degeneration or not - its quasi...
  8. Z

    how to calculate the series resistance of spiral inductor

    how to find series resistance of inductor If you know S-parameters -> Z-parameters, than just like this - Rp=real(Z(1,1))
  9. Z

    How to define frequency ranges for ADS optimization?

    optim ads Use 2 "Goal" elements- whats the only solution, there in the field: Expr - write "dB(S(1,1))" Min= -10 Max = -5 RangeVar[1]=freq RangeMin[1]=1e9 RangeMax[1]=2e9...and for the 2nd Goal - do the same
  10. Z

    Broadband Signal Generator

    Hello! Can someone suggest me to use signal generator, which can produce broadband signal? I need 2GHz broadband signal with center frequency 7GHz. Does somebody have any experience with signal generator, which can be modulated on 7GHz with 2 GHz modulation frequency? Firm of the...
  11. Z

    Spiral Inductor in ADS

    If you need some constant value and don't care much about topology - use componets from "TLine_Microstrip". Or just draw a topology of the inductor, simulate it, and calculate the value - very usefull empirical method. If you good at programming, you can on the "ael" language programm the...
  12. Z

    Balun self resonanse frequency

    True, but anyway together with parallel capacitor I force resonanse on my working frequency, so just on the line of the inductor/capacitor behaviour. Inductance variation +/- 0.2nH is acceptable. Problem is, who ever I asked, my colleagues, says that they wouldn't recommed to use it on self...
  13. Z

    Balun self resonanse frequency

    Hello everyone! I've the following problem: I use balun for the single ended-to-differential transformation, but the self resonanse frequency of the primary winding is almost at my working frequency- 7.75GHz(working - 7.7GHz). Can I use such transformer? Someone says, that normally recommended...

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