Electrical Engineering Answers

How does an integrate and dump receiver maximize the signal to noise ratio?

How is it different from a correlation receiver? Draw the diagrams, wave forms

and mathematically show the analysis.

Draw and Explain the transmitter and receiver of BFSK. Draw the signal space

representation of it.

Compare integrate and dump receiver and matched filter ? Analyze the goal

of a matched filter? Draw the diagrams, wave forms and mathematically

show the analysis.

Describe the significance of DSBSC signal in terms of its expression, waveform and

power efficiency. Also discuss in which condition an envelop detector be used to

demodulate a DSBSC signal or and in which condition not.

Two signals a(t)=10cos(100Πt) and b(t)=15cos(5000Πt) are applied to a non-linear

device to generate an AM signal with output y(t)= 3 + 2v + 4v^2. Find expression of

the AM signal, calculate its modulation index, bandwidth and draw its spectral

response. Also draw the circuit with required parameters which will be able to

produce this AM signal.

A signal is given by the expression y(t) = 10 cos(200 pi t) + cos^2(100 pi t).cos(300 pi t) + 5

Represent the signal in frequency domain and calculate its bandwidth.

In frequency modulation the following signals are used 10cos(200Πt) and

10cos(1000Πt). Find the expression of the FM signal, its Bandwidth, modulation

index, the spectral response and the transmitted power. Given, frequency sensitivity is

20 Hz/V

at 20 degree celcius the winding resistance was 150 ohm. after running the machine for 6 hours the resistance was found to be 170 ohm. if the temperature coefficient of the copper winding is 1.57*10^-8/ degree celcius at 0 degree celcius determine the temperature rise of the machine

at 20 degree celcious the field resistance was 150 ohm. after running the machine fir 6 hours at full load the resistance was supposed to be 170 ohm

A moving coil ammeter, a thermal ammeter and a half-wave rectifier are connected in series with a resistor across 110 V a.c. supply. The circuit offers a resistance of 50Ω in one direction and an infinite resistance in the reverse direction. Calculate (i) the readings on the ammeters and (ii) the form factor and peak factor of current wave. Assume the supply voltage to be sinusoidal.