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    Phase locked loop for 440 Hz Sine Wave Tone

    Can someone explain for phase locked loop (for synchronization purpose) for 440 Hz-500 Hz Sine Wave Tone for sound application using PIC Microcontroller

    Can some one explain circuit along with Pseudo code for PIC controller say PIC16F887

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    Re: Phase locked loop for 440 Hz Sine Wave Tone

    Research about "all digital PLL".

    Circuit is simple, connect input signal to ADC input. Other option to convert sine to square wave and process with digital input.



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    Re: Phase locked loop for 440 Hz Sine Wave Tone

    Quote Originally Posted by FvM View Post
    Research about "all digital PLL".

    Circuit is simple, connect input signal to ADC input.
    How about the negative half cycle of SINE wave as PIC reads only +ve half



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    Re: Phase locked loop for 440 Hz Sine Wave Tone

    AC voltage will be biased ADC range center.



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