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When using DAC/ADC pairs, which way is more resistant to noise and nonlinearities?

Discussion in 'Embedded' started by Frank, Dec 12, 2005.

  1. Frank

    Frank Guest

    I am inexperienced with analog thingy.

    My digital clock is 40MHz, modulates a 10mbps bit stream into some
    The modulated output value lies between two narrow bands, 0-63 for input
    or 960-1023 for input ones, when input bit flips, output also change between
    band and higher band. When input bit remain unchanged, output flactuates
    their narrow bands.

    Now my task is to send this waveform through TI DAC290x-EVM (DAC chip) and
    Analog AD9218 (ADC chip), and make the demodulator demodulate the ADC

    My digital outputs are in 2's compliment, I can easily convert that into
    binary value (thus
    between 448-576) if it's advantageous.

    Which is better option?
    Frank, Dec 12, 2005
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  2. Frank

    Frank Guest

    Does it make sense to shift the binary value left/right by 3 bits in my
    digital chip?
    It's likely to make it more resilient against gaussian noise in analog
    Frank, Dec 12, 2005
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