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Recent content by gpugelni

  1. G

    [SOLVED] Mosfet mixer gain problem

    I was find out what is the problem, replace BF981 with BF960 and you will get 20 dB of gain. Regards,
  2. G

    Band switch diode for RF

    Thanks for help !
  3. G

    Band switch diode for RF

    I have filter in which I must use switch diode for desired band pass. So, in original schematic is used BA423 (AM band switch diode), in the other hand I can buy BA243 (Diode switch). Working frequency of switch circuit is 10,7MHz. I was noticed that BA243 have 50....1000MHz frequency range...
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    Electronic circuit simulation

    Yes I was findout that I had bug in circuit and that all simulators do same. Regards,
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    [SOLVED] Mosfet mixer gain problem

    I have problem with this mixer on picture. Is it normal that after BF981 IF amplitude is lower then input signal in mixer (70MHz)? Would not this kind of mixer have some small gain? For XTAL I use 20MHz crystal instead of 60MHz (because I can't find 60MHz crstal) , I have oscilation of 60 MHz on...
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    Electronic circuit simulation

    HI, Does anyone know for good electronic circuit simulation software, something like Electronic workbench? I have EWB9, but I'm not so happy with it because circuit in it's simulation don't work even close like same circuit in practice. Thanks
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    Strange FFT results- recombined waveform is different

    Hi, Just for an information did you made some progress with this code? Regards
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