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CDCE937 feedback resister value

yoshihiro hirata
Expert 1425 points

Other Parts Discussed in Thread: CDCE937

I heard that CDCE937 include feedback resister.

Please let me feedback resister value of CDCE937.

Xtal bender will use it for matching test.

Best regards,

Yoshihiro Hirata

  • 0
    TI__Mastermind 24205 points
    Hi Hirata San,
    Are you referring to the CDCE937 crystal oscillator internal feedback resistor? This feedback resistor is used to bias the inverter amplifier in the linear region. We do not recommend installing any external feedback resistor. The exact value of this internal feedback resistor is not required for xtal vendors. Feedback resistors for pierce oscillators can be anywhere from 100K-25MOhms.
    RegardsArvind
  • 0 in reply to Arvind Sridhar
    Expert 1425 points
    Arvind-san,
    Thank you for your quick response.
    Yes, I am referring to the CDCE937 crystal oscillator internal feedback resistor.
    I will talk to the xtal bender again.
    Best regards,
    Yoshihiro Hirata