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  • Users: davicente
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  1. davicente

    FRECUENCY MEASUREMENT

    Hi all, I have to measure frecuency inside a 1Ghz pulsed signal, about 500ns wide. I think it is too narrow to try a traditional PLL, but maybe mixing with a DDS until i obtain a continious DC level (ripple should be specified depending on resolution:10Khz) and then reading their registers to...
  2. davicente

    AVIONIC AND RF

    Hi, my name is David and I'm working on a power amplifiers to be used in avionic.The final equipment is already being used but we've discovered some problems related with the radiated pulsed energy. Could anybody suggest a site, book, or anything where I could find precise information about the...
  3. davicente

    am80912-015

    Hello, my name is David and now I'm working with power amplifier in 1030/1090 MHz. I've been using the AM80912-015 ST transistor in my amplification chain, but now ST says that this transistor will be obsolete soon, so I'm looking for a substitute with similar characteristicas in order not to...
  4. davicente

    frecuency stability(PPM) in a PLL

    Hello, my name is David.I`d like to know if the frecuency stability of the output signal in a PLL is the same as in the clock reference used in the loop.I mean, if the reference clock is 4 PPM, and the PLL has a multilplicative factor x15 to obtain a 300 MHZ output signal, has this output signal...
  5. davicente

    120 mhz bandpass filter

    I'm working in a 120 mhz bandpass filter, i've designed it through a high-pass after a low-pass filter.The problem is that although i`ve simulated it with and without the pads and microstrip lines, whenever i make the PCB, i never obtain the desired results.I`ve tried to imulate it with RFSIM99...

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