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Phase-locked loop (phase sensitive detector)

moki fonk
Prodigy 220 points
Other Parts Discussed in Thread: LMX2485, LMX2430, CD54HC4046A

I want to design a phase sensitive detector to recover small signal in presence of noise and low frequency. Which mean I want to demodulate the signal so that I can recover the signal. I have used the synchronous detection but the problem is if the reference signal phase is change from 0 to 90 degrees (from a sine to cosine) the output signal phase changes. Which to ask if there is any PHASE LOCKED LOOP IC which can be used for this application that locked the phase no matter if the reference input signal phase changes.

  • 0
    TI__Mastermind 27581 points

    Moki,

    All the LMX series of PLLs, which is the series that I am familar with, use a phase frequency detector, that will track the frequency, even if the phase is off.  Consider the LMX2485 or LMX2430 series of integer PLLs.  Hopefully, these are not too high frequency for you.

    Regards,

    Dean

  • 0 in reply to Dean Banerjee
    Prodigy 220 points

     

    He Dean,

    My input is a swept sinusoidal, the LMX2485 or LMX2430 frequency is too high. My input frequency is max 100MHz. I have looked at the CD54HC4046A and in the datasheet there used a square as reference input signal. Is it’s possible to used swept sinusoidal input? Which TI simulation software can I used to simulate the CD54HC4046A or any other PPL+VCO IC.

    Regards,

    Moki