Reference no: EM131193688
1. Your company have been asked to design an attenuator which interfaces between a television receiver and a high gain aerial. Unfortunately the aerial has been designed incorrectly with the right gain, but the wrong characteristic impedance.
Through experimentation with an asymmetric attenuator using a 0 - 0.75K? potentiometer set to 43% and a variable resistor set to 136.8? (shown below), the required attenuation was achieved (AC is connected to the aerial, BD is connected to the receiver).
a. Determine the image impedance seen at AC
b. Determine the image impedance seen at BD
c. Assuming the receiver is impedance matched with that seen at AC and is connected across BD with AC as the input; determine the insertion loss and attenuation.
d. The aerial will be re-designed to have the same impedance as the receiver.Design a fixed single stage symmetrical attenuator to provide the same amount of attenuation.
e. Verify the attenuation of your symmetrical design matches that of the asymmetric experiment by constructing and analysing the attenuators on Multisim (or something similar).
![545_Fig.jpg](https://secure.expertsmind.com/CMSImages/545_Fig.jpg)
2. It has been measured that the voltage supplied is:
v = 325.27sin(ωt) + 128.42sin(3ωt + 65°) + 77.22sin(5ωt - 30°) Volts
when connected to the circuit shown below.
![2241_Fig1.jpg](https://secure.expertsmind.com/CMSImages/2241_Fig1.jpg)
Assuming the frequency is 50Hz, and the capacitor C is tuned to produce resonance at the third harmonic, determine:
a. The value of the capacitor
b. An expression for the currentsupplied to the circuit in the Fourier form
c. The RMS value of the voltage and current supplied
d. Using the applications package Multisim (or something similar), construct the circuit and explain how your simulation matches the voltage specified.
e. Using the instruments available in the simulation package (e.g. a multimeter set to AC Volts), estimate the RMS voltage and current for the circuit and compare it to the values determined in part c.
Indicate the direction of the shift in the supply curve
: Indicate the direction of the shift in the supply curve or the demand curve for dollars; the factor causing the change, and the resulting movement of the equilibrium exchange rate for the dollar in terms of foreign currency if the United States exper..
|
Use their personal cell phones to make most business calls
: Managers of some small businesses save costs by eliminating most of the land line telephones and require that employee use their personal cell phones to make most business calls. What do you see as the advantages and disadvantages of this approach to..
|
How would you distinguish between a mutagen and a carcinogen
: Our DNA is subject to mutations on a daily basis. Why do most mutations that occur in the genome of organisms escape detection and not elicit a deleterious effect? Why does the child of someone with cancer not necessarily develop cancer?
|
Marginal methodology to explain depression-market failure
: How did Keynes use marginal methodology to explain depression and market failure? Discuss how Keynes used neoclassical theories on market clearing to explain depression. In what aspects that Veblen provided an alternative theory to economics?
|
Design an attenuator
: Determine the image impedance seen at AC - Determine the image impedance seen at BD and Verify the attenuation of your symmetrical design matches that of the asymmetric experiment by constructing and analysing the attenuators on Multisim
|
Recycle paper to save the environment
: Write a detailed illustrated report on the title: Recycle paper to save the environment in around 800 to 900 words document plus 2-3 references. The report must include the necessary diagrams related to the topic.
|
Phrase doing ethics and being ethical are not the same thing
: explains what the author means by the phrase "doing ethics and being ethical are not the same things".
|
Reflect on quality health outcomes and utilization
: Reflect on quality health outcomes, utilization, and disparity in the Indian healthcare system. India's healthcare infrastructure has not kept pace with the economic development. What are some of the factors that are adversely impacting the healthcar..
|
Discuss two things you found out about topic
: 1. Discuss a workspace ergonomically designed? Do some research into the field of ergonomics. Be sure to cite your resources. Please do NOT make Wikipedia your primary source. You may use it, but there should be other reputable sources included fi..
|