Question

What is the configuration of system for digital processing of an analog signal?

(a) Analog signal|| Pre-filter -> D/A Converter -> Digital Processor -> A/D Converter -> Post-filter

(b) Analog signal|| Pre-filter -> A/D Converter -> Digital Processor -> D/A Converter -> Post-filter

(c) Analog signal|| Post-filter -> D/A Converter -> Digital Processor -> A/D Converter -> Pre-filter

(d) None of the mentioned

This question was addressed to me by my college director while I was bunking the class.

This interesting question is from Discrete-Time Processing of Continuous Time Signals topic in chapter Discrete Time Systems Implementation of Digital Signal Processing

Answer 1

The correct choice is (b) Analog signal|| Pre-filter -> A/D Converter -> Digital Processor -> D/A Converter -> Post-filter

Best explanation: The anti-aliasing filter is an analog filter which has a twofold purpose.

Analog signal|| Pre-filter -> A/D Converter -> Digital Processor -> D/A Converter -> Post-filter