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In which of the filter circuits given below, will the bandwidth be equal to the critical frequency?(a) Low-pass(b) High-pass(c) Band-pass(d) Band-stopI got this question in an interview for internship.My enquiry is from Advanced Problems on Filters topic in division Filters and Attenuators of Network Theory |
Answer» CORRECT answer is (a) Low-pass The explanation is: Bandwidth can be calculated by CONSIDERING, Largest positive value – Smallest Positive Value Here, in case of the Low-pass FILTER only, the largest positive value will of course be the CRITICAL frequency, beyond which frequencies have to be blocked. Hence, the bandwidth in a Low-pass filter EQUALS the critical frequency. |
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