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An analog high pass filter can be mapped to a digital high pass filter.

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An analog high pass filter can be mapped to a digital high pass filter.

(a) True

(b) False

I had been asked this question in an online interview.

Asked question is from Backward Difference Method topic in portion Digital Filters Design of Digital Signal Processing

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The correct option is (b) False

The explanation: An analog high pass filter cannot be mapped to a digital high pass filter because the poles of the digital filter cannot lie in the correct region, which is the left-half of the z-plane(z < 0) in this case.

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