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Electrical Engineering
Noise voltage from a 50 Ohm resistor obtained after amplification by an amplifier with 60 dB voltage gain in 100 mV at 27 degree centigrade. Calculate the bandwidth of the amplifier. What will be the noise voltage if the temperature is increased to 57 degree centigrade?
Electrical Engineering
Discuss the significant parameters influencing the performance of receiving system.
Electrical Engineering
Two linearly polarised electromagnetic waves propagate in unison in free space, and their magnetic field vectors are given by
H1 = 3 e^(jy) xˆ mA/m and H2 = j 6 e^(jy) zˆ mA/m respectively, and y is in metres. Determine:
(a) The instantaneous electric field intensity vector of the resultant wave.
(b) The type (linear, circular, elliptical) and handedness (right- or left- handed) of the
polarisation of the wave.
H1 = 3 e^(jy) xˆ mA/m and H2 = j 6 e^(jy) zˆ mA/m respectively, and y is in metres. Determine:
(a) The instantaneous electric field intensity vector of the resultant wave.
(b) The type (linear, circular, elliptical) and handedness (right- or left- handed) of the
polarisation of the wave.
Electrical Engineering
A uniform plane wave travels through free space, and its instantaneous electric field intensity vector is expressed as
E=15cos(ωt+10πz+θ) yˆ V/m
Where time is in seconds, position z is in meters. The magnetic field intensity of the wave is
H=0.02 A/m at t = 0 and z = 1.15 m. Determine
(a) The operating frequency and initial (for t = 0) phase θ of the electric field in the plane z = 0.
(b) Expression for the instantaneous magnetic field intensity vector
(c) The complex magnetic field intensity vector
E=15cos(ωt+10πz+θ) yˆ V/m
Where time is in seconds, position z is in meters. The magnetic field intensity of the wave is
H=0.02 A/m at t = 0 and z = 1.15 m. Determine
(a) The operating frequency and initial (for t = 0) phase θ of the electric field in the plane z = 0.
(b) Expression for the instantaneous magnetic field intensity vector
(c) The complex magnetic field intensity vector
Electrical Engineering
Please describe MEMS acclerometer data acquisation using PGDA . how the data is transmitted and the logic behind it.
Electrical Engineering
A time dependent voltage is v(t) = (6coswt - 8sinwt) V
Find the phasor V that represents v(t)
Find the phasor V that represents v(t)
Electrical Engineering
b. A digital system is designed to transmit music from flute that generates waveforms with maximum frequency around 11KHz. At what rate should it be sampled
a. If the input signal has values as follows
20 38 56 74 92 110 125 145 166 183 202 217 236 256
Show that the output from DPCM coder
a. If the input signal has values as follows
20 38 56 74 92 110 125 145 166 183 202 217 236 256
Show that the output from DPCM coder
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#331389 on Nov 2022
#331389 on Nov 2022