Need help about 38khz Oscillator

Discussion in 'General Electronics Chat' started by waldopulanco, Nov 28, 2013.

  1. waldopulanco

    Thread Starter New Member

    Nov 14, 2013
    26
    0
    Hi Im here again! can i ask about 38khz crystal oscillator.
    what CMOS can i use to oscillate the 38khz crystal and the output is 38khz and 19khz?

    CMOS 4060 is complicated because there is no divide by 1! bacause i need is 38khz and 19khz with 38khz crystal. if i use 4020 there is no divide by 1 but have divide by 2 so the out is 19khz below no 38khz output and there is no oscillator.

    is there any cmos that have an oscillator to oscillate the 38khz crystal and the output is 38khz and 19khz?

    thanks!!
     
  2. waldopulanco

    Thread Starter New Member

    Nov 14, 2013
    26
    0
    i think it can be use to CMOS CD4060 with 38khz crystal! the output for 19khz is pin #7 how about the 38khz output can i use pin #9 or #10?

    thanks!!
     
  3. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    Pin 9 of CD4060 - Φ0 is the frequency of crystal 38Khz, the frequency of Pin 7 is the 38Khz divide by 16 equal to 2375 Hz.

    If you want to do that, then you can using CD4069 to be a oscillator and adding one inverter after the oscillator to get the 38Khz, and using CD4013 to divide by two to get the 19Khz.

    CD4069 32.768Khz Crystal oscilltor.
     
    waldopulanco likes this.
  4. waldopulanco

    Thread Starter New Member

    Nov 14, 2013
    26
    0
    thanks!! i will try!!
     
  5. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    These crystals are very rare. In the 1980s they were used for stereo seperation.

    I think they are hard to find now.
     
  6. waldopulanco

    Thread Starter New Member

    Nov 14, 2013
    26
    0
    yes its hard to find!! but my friend in the US is try to buy it and send it to me!!
     
Loading...