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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AD6654/PCB Datenblatt(PDF) 37 Page - Analog Devices |
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AD6654/PCB Datenblatt(HTML) 37 Page - Analog Devices |
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37 / 88 page  AD6654 Rev. 0 | Page 37 of 88 EXAMPLE CALCULATIONS Goal: Implement a filter with an input sample rate of 100 MHz requiring 100 dB of alias rejection for a ±1.4 MHz pass band. Solution: First determine the percentage of the sample rate that is represented by the pass band. 4 . 1 MHz 100 MHz 4 . 1 100 = × = FRACTION BW In the −100 dB column in Table 15, find the value greater than or equal to the pass-band percentage of the clock rate. Then find the corresponding rate decimation factor (MCIC). For an MCIC of 6, the frequency that has −100 dB of alias rejection is 1.48%, which is slightly larger than the 1.4% calculated. Therefore, for this example, the maximum bound on CIC decimation rate is 6. A higher MCIC means less alias rejection than the 100 dB required. |
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