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Q#1
Data Converters
GATE EE 2006
MCQ
+2 marks
-0.66 marks
It is required to design an anti-aliasing filter for an 8 bit ADC. The filter is a first order RC filter with R = 1Ω and C = 1F. The ADC is designed to span a sinusoidal signal with peak to peak amplitude equal to the full range of the ADC.
The transfer function of the filter and its roll off respectively are
dB/decade
dB/decade
dB/decade
dB/decade
Explanation:
Transfer function of RC Filter
For nth-order filter roll-off slope = “n x -20dB/decade”.
For first order filter roll off = -20dB/decade
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