Virtual Labs

An IIR filter having numerator order M and denominator order N is to be realized using direct form II structure. How much total number of multiplications, additions and memory locations are required respectively ?

a: M + N, M + N and M + N Explanation

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b: M + N, M + N and maximum of {M, N} Explanation

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c: M + N + 1, M + N + 1 and M + N Explanation

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d: M + N + 1, M + N and maximum of {M, N} Explanation

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Assertion:- IIR filter is the non-recursive type of filter. Reason:- IIR used feedback circuitry.

a: Both (A) and (R) are true and (R) is correct explanation of (A) Explanation

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b: Both (A) and (R) are true but (R) is NOT the correct explanation of (A) Explanation

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c: (A) is true but (R) is false Explanation

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d: (A) is false but (R) is true Explanation

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Consider the following statements regarding the impulse invariant method of IIR filter design: 1. After digitizing the analog filter, the impulse response of the original analog filter is preserved. 2. The method is inappropriate for the design of high-pass or band-stop filters. Which of these statements is/are correct?

a: 1 only Explanation

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b: 2 only Explanation

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c: Both 1 and 2 Explanation

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d: Neither 1 nor 2 Explanation

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A digital signal processing system is described by the expression: y(n) = 2x(n) + x(n – 1) + 2y(n – 1) The system is:

a: A stable FIR filter Explanation

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b: A stable IIR filter Explanation

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c: An unstable FIR filter Explanation

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d: An unstable IIR filter Explanation

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