Microchip Technology Audio Digital-to-Analog Converter Manuel d'utilisateur Page 19

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© 2007 Microchip Technology Incorporated. All Rights Reserved. Audio Digital-to-Analog Converter Slide 19
DAC Conversion Process
First, the digital interpolation filter up-samples the input signal to create additional
interpolated data points. The over sampling ratio is 256:1, or 256x the incoming
sampling rate. For example, a 100-ksps input signal (the maximum sampling rate)
produces 25.6M data points per second. The interpolation filter also eliminates
unwanted noise produced by the up-sampling process.
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