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Recent content by maame

  1. M

    I need help on 74hc297 or 74hc7046

    [you design the PLL or use the lib?] Hi jxpjpjljx I'm not sure what you mean but yes I'm designing and I want to actually build the pll. thanx
  2. M

    I need help on 74hc297 or 74hc7046

    Hi I was wondering which is best to use to multiply very low frequency as in about 0.7 hz to about 9 hz. is an all-digital PLL (74hc297) or a DPLL(74hc7046) what i need? Please help if you can. thanks.
  3. M

    PLL, DDL, DDS or DPLL

    Hi, I am trying to build a circuit to multiply frequencies of between 0.4hz and 4Hz by a 12. Which is best to use for such low frequencies, PLL, DDL DDS or DPLL? And apart from PLL (which I kind of know what I need to buy) what are the additional components I'll need to buy in addition...
  4. M

    [HELP] Full digital DLL or DDR needed

    Re: [HELP] Full digital DLL hi realtek, I hope any of these sites will be of help. www.xilinx.com/support/.../application_notes/xapp854.pdf www.xilinx.com/support/.../application_notes/xapp132.pdf
  5. M

    meaning center frequency

    what does it mean if the datasheet of 74hc4046A claims the minimum center frequency of the device is 12 Mhz? Can this center frequency be reduced to fit in other applications?
  6. M

    cd4046 with input square wave

    Hi, I have been trying to design a pll to multiply square wave corresponding to a frequency of about 1.2 Hz using cd4046 by 12. I've not built it yet but I want to know if CD4046 can synthesize such low frequency and if it can work on square wave input. Second, does the cd4046 have a minimum...
  7. M

    PLL multiplication of variable frequency input

    Thanks Element_115 for replying to my post. Actually, it is a square wave input I'm looking at. It is a comparator representation of pulses which vary in frequency, making the square wave vary also in frequency. I have a sample of the input signal attached to my earlier post. And for DLL or...
  8. M

    PLL multiplication of variable frequency input

    Hi all, I'm in a fix about something here. I want to design a pll circuit that multiplies a varying frequency reference signal by 12. It is actually a square wave but not with a constant frequency. They are supposed to correspond to pulses (attached a figure of what I mean). Now my question...
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