Chapter 12, MODULATING, DEMODULATING, AND FREQUENCY CHANGING WITH THE MULTIPLIER Video Solutions, Operational Amplifiers and Linear Integrated Circuits

Problem 1

Find $V_o$ in Fig. $12-1$ for the following combination of inputs: (a) $x=5 \mathrm{~V}, y=5 \mathrm{~V}$; (b)
$$
x=-5 \mathrm{~V}, y=5 \mathrm{~V} \text {; (c) } x=5 \mathrm{~V}, y=-5 \mathrm{~V} \text {; (d) } x=-5 \mathrm{~V}, y=-5 \mathrm{~V} \text {. }
$$

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01:26

Problem 2

State the operating point quadrant for each combination in Problem 12-1 [see Fig. 12-2(a)].

Ankit Gupta

Numerade Educator

02:27

Problem 3

What is the name of the procedure used to make $V_o=0$ when both $x$ and $y$ inputs are at $0 \mathrm{~V}$ ?

Vikash Ranjan

Numerade Educator

06:15

Problem 4

Find $V_o$ in Fig. 12-3 if $E_i=-3 \mathrm{~V}$.

William Mead

Numerade Educator

02:27

Problem 5

The peak value of $E_i$ in Fig. 12-4 is $8 \mathrm{~V}$, and its frequency is $400 \mathrm{~Hz}$. Evaluate the output's (a) dc terms; (b) ac term.

Keshav Singh

Numerade Educator

03:20

Problem 6

In Fig. 12-5, $E_{x p}=10 \mathrm{~V}, E_{y p}=10 \mathrm{~V}$, and $\theta=30^{\circ}$. Find $V_o$.

Vishal Gupta

Numerade Educator

01:14

Problem 7

Repeat Problem 12-6 for $\theta=-30^{\circ}$.

Dharmendra Jain

Numerade Educator

03:20

Problem 8

$E_x=10 \mathrm{~V}$ and $E_{\text {in }}=-1 \mathrm{~V}$ in Fig. 12-6. Find $V_o$.

Vishal Gupta

Numerade Educator

05:15

Problem 9

In the balanced modulator of Fig. $12-9, E_x$ is a $15-\mathrm{kHz}$ sine wave at $8-\mathrm{V}$ peak and $E_y$ is a $3-\mathrm{kHz}$ sine wave at $5-\mathrm{V}$ peak. Find the peak voltage of each frequency in the output.

Zulfiqar Ali

Numerade Educator

01:07

Problem 10

In Fig. 12-9, the carrier frequency is $15 \mathrm{kHz}$. The modulating frequencies range between 1 and $2 \mathrm{kHz}$. Find the upper and lower side bands.

Amit Srivastava

Numerade Educator

04:14

Problem 11

The switch is on AM in Fig. 12-11. The modulating frequency is $10 \mathrm{kHz}$ at $5-\mathrm{V}$ peak. The carrier is $100 \mathrm{kHz}$ at $8-\mathrm{V}$ peak. Identify the peak value and each frequency contained in the output.

Amit Srivastava

Numerade Educator

00:31

Problem 12

If the switch is thrown to "Balanced" in Problem 12-11, what changes result in the output?

Mrinal Rana

Numerade Educator

Problem 13

The $x$ input of Fig. $12-14$ is three sine waves of $5 \mathrm{~V}$ at $20 \mathrm{kHz}, 2.0 \mathrm{~V}$ at $21 \mathrm{kHz}$, and $2.0 \mathrm{~V}$ at $19 \mathrm{kHz}$. The $y$ input is $5 \mathrm{~V}$ at $20 \mathrm{kHz}$. What are the output signal frequency components?

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00:40

Problem 14

You need to shift a $550-\mathrm{kHz}$ signal to a $455-\mathrm{kHz}$ intermediate frequency. What frequency should be generated by the local oscillator?

Nicole Smina

Numerade Educator