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Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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![### Question 14
Let \( h[n] \) be the impulse response of the following system:

The block diagram provided consists of:
- An input \( x[n] \) and an output \( y[n] \).
- Two branches dividing the input signal, each with branches containing the gain \( \frac{1}{2} \).
- Two delay elements represented by \( D \).
- A negative feedback loop with a gain of \( -2 \).
The task is to find for what values of \( A \) and \( B \) the impulse response \( h[n] \) satisfies the equation:
\[ h[n] = A \, u[n] + B \left( -\frac{1}{2} \right)^n u[n] \]
Here, \( u[n] \) is the unit step function.
### Options:
- \( A = -2 \) and \( B = -2 \)
- \( A = -2 \) and \( B = -\frac{7}{2} \)
- \( A = -\frac{2}{3} \) and \( B = -\frac{7}{6} \)
- \( A = -\frac{2}{3} \) and \( B = \frac{2}{3} \)
Choose the correct option.](https://content.bartleby.com/qna-images/question/6e3992ca-2280-40ba-b65a-68dc98c03d5d/cc0f8db7-0d85-4103-819c-704dc771b153/nq7a3bl_thumbnail.jpeg)
Transcribed Image Text:### Question 14
Let \( h[n] \) be the impulse response of the following system:

The block diagram provided consists of:
- An input \( x[n] \) and an output \( y[n] \).
- Two branches dividing the input signal, each with branches containing the gain \( \frac{1}{2} \).
- Two delay elements represented by \( D \).
- A negative feedback loop with a gain of \( -2 \).
The task is to find for what values of \( A \) and \( B \) the impulse response \( h[n] \) satisfies the equation:
\[ h[n] = A \, u[n] + B \left( -\frac{1}{2} \right)^n u[n] \]
Here, \( u[n] \) is the unit step function.
### Options:
- \( A = -2 \) and \( B = -2 \)
- \( A = -2 \) and \( B = -\frac{7}{2} \)
- \( A = -\frac{2}{3} \) and \( B = -\frac{7}{6} \)
- \( A = -\frac{2}{3} \) and \( B = \frac{2}{3} \)
Choose the correct option.
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