11. Superheterodyne Receiver AnalysisConsider a superheterodyne receiver designed to receive AM broadcast signals.RF StagefLOLocal ocillatorIF StageThe intermediate frequency (IF) is set to 455 kHz. The receiver is tuned to an AM signal, (t),with the carrier frequency (fe) of 1.5 MHz and bandwidth of 10kHz.(a) Determine the corresponding local oscillator frequency (fLo) and the image frequency(fimage), under the condition that fLO < 1.5 MHz.HRF(f) =(b) Explain briefly why the image signal cannot be eliminated at the output of the IF filtereven if the IF filter is ideal with the bandwidth of 10 kHz.(c) The frequency response of the RF filter, HRF (f), is given by{1AMDemodulator0.011495 kHz≤ f ≤ 1505 kHzelsewhere(1)Assuming that the tuned AM signal (p(t)) and the image signal have the same power atthe input of the receiver, determine the ratio of image signal power to the tuned AM signalpower at the output of the IF filter.

Given:A superheterodyne receiver designed to receive AM broadcast signals.The intermediate frequency…

(a) Determine the corresponding local oscillator frequency (fLo) and the image frequency (fimage), under the condition that fLO < 1.5 MHz. (b) Explain briefly why the image signal cannot be eliminated at the output of the IF filter even if the IF filter is ideal with the bandwidth of 10 kHz. (c) The frequency response of the RF filter, HRF(f), is given by 1 -{₁ HRF(f) = 0.01 1495 kHz ≤ f ≤ 1505 kHz elsewhere (1) Assuming that the tuned AM signal (p(t)) and the image signal have the same power at the input of the receiver, determine the ratio of image signal power to the tuned AM signal power at the output of the IF filter.

(a) Determine the corresponding local oscillator frequency (fLo) and the image frequency (fimage), under the condition that fLO < 1.5 MHz. (b) Explain briefly why the image signal cannot be eliminated at the output of the IF filter even if the IF filter is ideal with the bandwidth of 10 kHz. (c) The frequency response of the RF filter, HRF(f), is given by 1 -{₁ HRF(f) = 0.01 1495 kHz ≤ f ≤ 1505 kHz elsewhere (1) Assuming that the tuned AM signal (p(t)) and the image signal have the same power at the input of the receiver, determine the ratio of image signal power to the tuned AM signal power at the output of the IF filter.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

For the filter: a) Determine type of filter and the cut-off frequency (Fc). Determine the peak voltage at the cut-off frequency (Fc). b) Find GAIN (Vo/Vi) at f = .1*Fc . Find GAIN (Vo/Vi) at f = 10*Fc . c) Determine the frequency at which GAIN = .4 (i.e., Vo = .4*Vi) . Draw the “Frequency Response Plot” in “Log-Log” format .
The buck regulator in the next figure has an input voltage Vs = 15 V. The required average output voltage Va = 6.5 V at la = 0.5 A and the peak-to-peak output ripple voltage is 10 mV. The switching frequency is 20 kHz. The peak-to-peak ripple current of inductor is limited to 0.25 A. Determine (a) the duty cycle k, (b) the filter inductance L, O the filter capacitor C, and (d) the critical values of L and C. Q1 +eL iL + + ile io,la 10 Control Dm C Vc vo. V Load
A student is doing a measurement using a sensor at 400HZ. However, there is noise present at 0.5MHZ. Help the student to improve the measured data by: (i) (ii) Designing a low-pass filter that can attenuate the noise by 97%. What is the effect of the filter to the data signal?
Please provide Handwritten answer. Electrical Engineering It is a common practice to low-pass filter signals before feeding them into an A/D Converter. The purpose of this filter is to eliminate any noise or other frequency components beyond a useful frequency range. For instance, if you are recording ECG, you would low-pass filter it at 100Hz because there is no useful frequency components beyond 100Hz and if there is any component that would be noise. What problem arises during sampling of the signal by the A/D Converter if this pre-filter is not used? How does the sampling frequency need to be adjusted with and without the pre-filter? Answer the question considering Nyquist theorem.
A geophone is able to pick up signals in the frequency range of 20 Hz to 340Hz. Design anactive filter and a passive filter the earth vibration signal which ranges from 50 Hz to 250 Hz.What is the filter gain when the signal is at 450 Hz for both filters? Please state which type offilter performs better in this scenario and why
2. In each case, what will be the frequency in the square wave and the sampling rate you will choose in your experiment? 3. Sketch the voltages on R and C for 2 period of the square wave, label your time axis with value and unit. 4. repeat step 4 for RL circuit.
a) What type is the active filter shown in the following figure? b) Determine the roll-off rate. c) Find the values of the unknown resistors and capacitors to implement an equal value Butterworth response with an f. = 1 KHz if the damping factor for this configuration is DF = 1.414. (Assume R2 = 1 KN) CAI RAI RB1 Св R1 R2
3. What is the output of an ideal low pass filter if the input is a square wave and f. = 1.5fo, where f. and fo are cut-off frequency of the filter and the square wave fundamental frequency, respectively? How can you approximate the output if the input is such that f. = 10fo ? v
a. Suppose a first order high pass filter has a cut-off frequency of 10 kHz and a capacitor of 2.5 nF. What is the value of the resistor? b. For the filter in (a), what is the gain of the filter at 100 Hz? Express you answer in decibels. (Hint: this requires hardly any calculation.)
Question 1 In this problem, you are required to design a 30-channel FDM multiplex for the transmission of voice signals. There are two bands available with the following frequency ranges: Band 1: 50 kHz - 80 kHz Band 2: 200 kHz - 230 kHz It is also required to have a 2 kHz guard band (no guard band is required is the beginning, i.e., before the first user) between each adjacent signal to avoid signal interference (for band 1). For band 2, 3 kHz guard band is required between each adjacent signal to avoid signal interference (no guard band is required is the beginning, i.e., before the first user). Draw a clear block diagram of your 30-channel. The diagram must show the number of stages of the multiplexer, the starting and the terminal frequency of each stage, the frequency of each guard band in each band, and the frequency of each user in each band (refer to last slide of chapter 4c pdf file). You should also describe the details of your design to get full credit.
5 a) Consider the sample sequence (5000, 5000, 5000, 5000, -5000, -5000, -5000, -5000}. These are samples of a square wave with a period of eight samples or 1ms at 16 KHz sampling frequency. What are the sinusoidal frequencies in the output waveform?
Write the equations at the points a, b, and c.) b) -Select the type of the filter and its resonant frequency.