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Recent content by txzzc1982

  1. T

    Poisson Superfish Simulation

    Hi, It's a really urgent problem. I'm doing dipole simulation in Poisson Superfish. But it looks like no saturation when I increased the current in coil. Could you guys help me to fix it? Thanks!
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    Derivative of Bessel Function in Matlab

    I need to perform numerical calculation like you said thanks CZ
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    Derivative of Bessel Function in Matlab

    hi there, i'd like to know how to get the derivative of first kind Bessel Function and the derivative of second kind of Bessel function in Matlab. Thanks!
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    A question about to convert a sine wave to a square wave

    Actually, I have a assembled box in which a 10MHz oscillator inside as well as other functions that I need in my system. So, I have to use it. I like your suggestion to double the frequency twice. Thanks! Added after 1 minutes: Hm...good idea! That's really what I expected to look for. Thank...
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    Looking for 4069 P-spice model

    Hi guys, Do you have a 4069 P-Spice model? 4069 is a CMOS Hex inverter. I'd like to use it to do simulation, but I cannot find it on TI's website. Do you know where I can get it? Also, I expect to use it at 40MHz. Is it realizable? Otherwise, is there any Hex inverter to be operated at such...
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    How to do Digital IQ demodulation?

    Hi guys, Do you know how to do digital IQ modulation and demodulation? What is the principle in theory? What issues do I have to notice when I design a circuit to do digital IQ modulation/delmodulation? Please give me some suggestions. If you know which paper is good at this area, please tell...
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    The definition of a PID filter

    Anyone could explain it for me? thanks!
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    A question about to convert a sine wave to a square wave

    Dear all, I am currently designing a sine to square wave converter at 10MHz, but also a frequency converter from 10MHz to 40MHz. Actually, I'd like to have a 40MHz clock with 50% duty cycle to my ADC for sampling at intermediate frequency. I have already had a oscillator produced a stable 10MHz...
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    HELP! Need a paper from MIXDES 2005

    Dear all, The paper I mentioned above is just for graduate study, not for the purpose of commercial or something like that. Since I could not get it in the United States. It looks like reserved in Poland. If you had it, please send it to my email box. txzzc1982@163.com Many thanks!
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    HELP! Need a paper from MIXDES 2005

    Dear all, I'd like to get a paper from: Proceedings of the 12th International Conference Mixed Design of Integrated Circuits and Systems Kraków, 22-25 June 2005 The paper is: Estimation of IQ Vector Components of RF Field - Theory and Implementation M. Grecki, T. Jezynski (Tech. Univ. Lodz...

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