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SM5847AF Datasheet(PDF) 14 Page - Nippon Precision Circuits Inc

Part # SM5847AF
Description  High-fidelity Digital Audio, Multi-function Digital Filter
PDF  30 Pages
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM5847AF Datasheet(HTML) 14 Page - Nippon Precision Circuits Inc

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SM5847AF
NIPPON PRECISION CIRCUITS—14
FUNCTIONAL DESCRIPTION
Oversampling (Interpolation)
The interpolation arithmetic block is comprised of 3
cascaded, 2-times FIR interpolation filters, as shown
in figure 1. The input signal is sampled at rate fs, and
then either 4-times or 8-times oversampling data is
output. Sampling noise in the 0.5465fs to 3.4535fs
(4fs output) or 0.5465fs to 7.4535fs (8fs output)
region is removed.
Figure 1. Arithmetic operating block
Input
fs
2-times interpolator
1st FIR
169-tap
2fs
2-times interpolator
2nd FIR 29-tap
4fs
Deemphasis IIR filter
Deemphasis ON
4fs
Soft mute
4fs
8fs
Output
Deemphasis OFF
2 -times interpolator
3rd FIR 17-tap
4fs



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