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For 16-QAM modulator, change the reference oscillator to cosωct and determine the output expressions for the following I, I', Q, Q' with input conditions: 0000, 1111, 1010, 0101.
An LED with a rated range of Vf = 1.4 V to 1.8 V at If = 20 mA is connected to a driver circuit with a peak output of 14 V. What value of current. limiting resistor would be needed to limit the LED current to a maximum value of 20 mA.
A satellite is 30,000 km from the Earths surface, receives signals at 14 GHz transmitted from the earth with an average power of 50 W, with an antenna gain of 55 dB in the direction of the satellite receiving antenna.
draw a digital design consisting of 2 input AND gates and three inverters, where an inverter is connected to each of the AND gates input and its output. For each of the four possible combinations inputs applied to the two primary inputs.
A listener increases his distance from a sound source by a factor of 4.11. Assuming that the source emits sound uniformly in all directions, what is the change in the sound intensity level in dB
Consider a magnetic dipole carrying a current I. a. Calculate the magnetic flux density B at a point P specified in spherical coordinates. Express the answer in terms of the magnetic dipole moment m. Justify all the assumptions adopted.
inductor L and assume they have been connected for Consider a circuit consisting of a sinusoidal source V s (t) = cos (t) u (t) volts connected in series to a resistor R and an a very long time.
A proportional control system is to be used to control the wing flap of a jet airplane. The wind load is expected to cause as much as 600 in-lb of torque. The system should be able to keep the flaps with 5o of the set point.
a. The mass of an electric car is 900 kg including the passengers. A single motor mounted on the front wheels drives the car, and the radius of the wheel is 0.3 m. The car is going downhill at a speed of 50 km/hr, and the slope of the hill is 30 d..
1. If x(t) is periodic with period 2.1 seconds and y(t) is periodic with period 2.4 seconds, is x(t)+y(t) periodic Why or why not 2. If x[n] is periodic with period 15 seconds and y[n] is periodic with period 10 seconds, is x[n]+y[n] periodic
What resistance must be connected in series with a heater rated at 150mA with hot resistance of 320 ohm in order to operate it safely from a 117-V source. What power rating must this resistor have
Assuming that we can determine the Thevenin equivalent resistance of our wall socket, why don't toaster, microwave oven,and TV manufactorer match each appliance's Thevenin equivalent resistance to this value
Hand calculate the expression for the voltage and current of the capacitor and plot these equations by using MATLAB and calculate the time constants of each circuit and point out this time constants at your voltage graphs.
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