Ask Question, Ask an Expert


Ask Electrical & Electronics Expert

problem 1: Describe without giving mathematical analyses, how Johnson noise in a resistor and short noise in a vacuum diode are produced?

problem 2: Define the term equivalent noise temperature of a radio receiver. Under what conditions could this be more helpful quantity than the noise figure?

problem 3: Deduce an expression for the mean square thermal noise voltage of a resistor at temperature T in a given bandwidth.

problem 4: Describe the equivalent noise bandwidth of the R-C filter.

problem 5: Define the signal-noise ratio and noise figure of a receiver. If the latter are more appropriate piece of information than the equivalent noise temperature, compute the total noise figure of n-cascaded networks.

problem 6: Categorize the noise in electrical communication and describe each one in short. In brief state the methods employed to decrease the noise in receivers.

problem 7: Compute the noise voltage at the input of a television R.F. amplifier, by using a device that consists of a 200 Ω equivalent noise resistance and a 300 Ω input resistance. The bandwidth of the amplifier is 6 MHz and the temperature is 17oC. The value of Boltzmann’s constant can be taken as 1.38 .10-28 J/K.

problem 8: Determine the value of minimum input signal needed for a 20 db signal to noise ratio in a receiver with a pas band of 10 KHz and an input circuit containing a resistance of 10 KΩ at room temperature.

problem 9: A diode operates in a temperature limited area with a noisy external load resistor R = 10 KΩ and a DC played current of 0.01 mA. Assess the total r.m.s noise voltage across the resistor for a bandwidth of 5 KHz.

problem 10: A receiver, connected to an antenna of resistance of 50 ohm, has an equivalent noise resistance of 30 ohm. Determine the receiver noise figure.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M97557

Have any Question? 

Related Questions in Electrical & Electronics

Electrical and computer engineering dc motor building

Electrical and Computer Engineering DC Motor Building Assignment- Assignment Description The purpose of this assignment is to give you practical experience with DC motors. The DC motor assignment consists of two parts. T ...

The ratio of resistances of a 100 w 220 v lamp to that of a

The ratio of resistances of a 100 W, 220 V lamp to that of a 100 W, 110 V lamp will be at their respective voltages is?

Consider the circuit in given figure with transistor

Consider the circuit in given Figure with transistor parameters, h FE  = 120, V BE  (on) = 0.7 V, and V A  = ∞. Using nodal analysis, determine the input resistance R i f .

If an ammeter reads 25 a for a period of 4 min determine

If an ammeter reads 2.5 A for a period of 4 min, determine the charge that has passed through the meter.

For the ladder network of given figurea find the current ib

For the ladder network of given figure: a. Find the current I. b. Find the current I 7 . c. Determine the voltages V 3 , V 5 , and V 7 . d. Calculate the power delivered to R 7 , and compare it to the power delivered by ...

Consider psk with m frac12a by how many degrees does the

Consider PSK with m = ½ a. By how many degrees does the modulated carrier shift in phase each time the binary data changes? b. What percent of the total power is in the carrier, and what percent is in the modulation comp ...

Computer problem plot the langevin function using various

Computer problem. Plot the Langevin function using various parameters. For which values of H does one obtain saturation magnetization?

In a sinusoidal-waveform permanent-magnet brushless servo

In a sinusoidal-waveform, permanent-magnet brushless servo motor, phase-to-phase resistance is 8.0 Ω and the phase-to-phase inductance is 16.0 mH. The voltage constant, which is the ratio of the peak phase voltage induce ...

The frequency of the emfin the stator of a 6 pole induction

The frequency of the the stator of a 6 pole induction motor is 50 Hz and that in the rotor is 2 Hz. What is the slip ,and at what speed is the motor running?

If there are 16 shades of gray per pixel 500 pixels per

If there are 16 shades of gray per pixel, 500 pixels per line, 525 lines per frame, and 30 frames per second in a TV set, calculate the maximum number of pixels per frame and calculate the maximum information rate in Mbi ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate