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3. (TCO 3) Answer the question with respect to the block diagram for SSB transmitter. (a) Draw the frequency spectrum at the output of first balanced modulator. (b) If the filter is a low-pass filter, draw the frequency spectrum at the output of filter and amplifier. (c) Draw the frequency spectrum at the output of second balanced modulator. (d) Find the value for required Q for the first filter.
an electric motor operates at 220V rms ,60 Hz, draws 20A rms, and has a power factor of 0.75 lagging. a) what is average power absorbed by the motor b) what value capacitor should be connected in parallel with the motor to give a power factor of 1
the project manager on a development project working on a new line of laptop computers. The project has been broken down into the following modules: Power supply, Processor and motherboard with RAM, I/O circuit board
Using bit-slicing technique, design a circuit that calculates the expression 2*a-b. Operands a, and b are each 4 bits long. The result is represented using 5 bits. Show the transistor-level design using dynamic circuits.
an office with several work stations has an effective area of 527 sqft (49 meters). it has decorative incandescent lighting. The lamps are 40 watt yielding an out put of 18 lm/W. An illumination of 645 lux is required for the work stations.
a carrier wave is frequency-modulated using a sinusoidal signal of frequency fm and amplitude Am. (a) determine the values of the modulation index beta for which the carrier component of the fm signal is reduced to zero. see the appendix for calcu..
A three-phase 45 MVA, 345/34.5 kV distribution transformer is used as a step-down transformer. Determine the phase VA, Voltage, Current ratings and turns ratios of the transformer if it is connected as follows (a) Wye -delta
A torque of 10 N.m is applied to a uniform disk shaped flywheel. The flywheel has a mass of 20kg and a radius of 0.5m. At t=0, the flywheel is at rest. How much energy is stored in the flywheel at the end of 20 sec
A separately excited dc motor turns at 1200rpm when the armature is connected to a 115V source. Calculate the armature voltage required so that the motor runs at 1500rpm.
Block diagram and equations for control system water fill, Develop a control system to fill a container with water after it is emptied through a stopcock at the bottom
The total charge that has accumulated on the positive plate of a capacitor varies with time. The charge follows q=At^2 for the first 4s. a) Find the value of current at t=2,6,9,12,16 s. b) Sketch the current i(t) as a function of time
What is the difference between the saturation and active regions of a BJT. What determines which region the transistor is in.
5eV for metal work function, 4.05eV for semiconductor electroaffinity, effective density of states for conduction band is 1019cm3, n-type doping density is 1015cm3, semiconductor dielectric constant is 11.8. (a) draw its energy band diagram with ..
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