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We can employ the analog frequency transformation followed by conversion of the result into the digital domain by use of impulse invariance and mapping the derivatives.

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We can employ the analog frequency transformation followed by conversion of the result into the digital domain by use of impulse invariance and mapping the derivatives.

(a) True

(b) False

I got this question in homework.

The above asked question is from Frequency Transformations in the Digital Domain topic in chapter Digital Filters Design of Digital Signal Processing

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Right answer is (b) False

Easy explanation: Since there is a problem of aliasing in designing high pass and many band pass filters using impulse invariance and mapping of derivatives, we cannot employ the analog frequency transformation followed by conversion of the result into digital domain by use of these two mappings.

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