Need Help with a superhetrodyne fm receiver.

Discussion in 'The Projects Forum' started by Mohyk, May 8, 2016.

  1. Mohyk

    Thread Starter New Member

    May 8, 2016
    2
    0
    Hello everyone
    So I came across a schematic diagram for a superhet fm receiver that uses fm ratio detector, so my question here, can I use the pll cd4046b ic as an fm detector instead of the ratio detector?
    The design uses an intermediate frequency of 10.7MHZ.
    I am asking this because :
    1- l don't want to use a transform as in the ratio detector circuit.
    2- I looked in the 4046 datasheet and it says "VCO maximum frequency is 1.2MHZ". I don't know if this has something to do with the IF frequency, so I am afraid that it won't function well with 10.7MHZ.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,343
    Hello,

    The 74HC4046 or 74HCT4046 can work upto 17 Mhz.

    Bertus
     
  3. Mohyk

    Thread Starter New Member

    May 8, 2016
    2
    0
    Thanks Bertus that was helpful!
     
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