• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 21 subscribers
  • Views 121 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CD74HC73: Frequency comparison

Hori Shota
Intellectual 415 points

Part Number: CD74HC73

Hi team,

I would like to create a frequency comparison circuit using the CD74HC73. My goal is to detect whether there is a frequency deviation of approximately ± several hundred kHz from a reference clock in the range of several MHz to several tens of MHz, and output a digital signal (Hi/Lo) to indicate OK or NG directly from the IC or with the help of additional circuitry. Is this possible with this IC? Also, are there any other ICs that can achieve this functionality?

Best Regards,

Shota

  • 0
    TI__Expert 5530 points

    Hi Hori Shota,

    This depends on exactly what you are trying to achieve. If you are only trying to determine which frequency is faster, this can be done using TI's flip flops. Try searching for "frequency comparator circuit" and taking a look through the results for examples to see if they meet your needs.

    Also, take a look at Phase Locked Loop (PLL) ICs to see if that's what you're looking for. I can only support logic devices, but maybe a PLL is what you want.

    Regards,

    Nikki