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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 component?
Suppose we have a resistive load that varies from 5 kOhms to 10 kOhms. We connect this load to an amplifier, and we need the voltage across the load to vary by less than 1 percent with variations in the load resistance.
Consider a Si p-n junction at room temperature. If the doping concentrations are NA=1016 cm-3 and ND=1015 cm-3, what is the depletion width also known as space charge width Also find the maximum electric field.
Determine the rms output voltage, the rms source current, the rms and average currents through SCRs, and the power factor.
A disk located at 0
Consider a circuit consisting of a sinusoidal source vs(t) = cos(t)u(t) volts connected in series to a resistor R and an inductor L and assume that they have been connected for a very long time. (a) Let R=0 and L=1 H. Compute the instantaneous and ..
A thin slab of magnetic material is inserted next to the z = 0 wall of the rectangular cavity shown below. If the cavity is operating in the TE101 mode, derive a perturbational expression for the change in resonant frequency caused by the magnetic..
A school has 100 lockers and 100 students. All lockers are closed on the first day of school. As the students enter, the first student, denoted by S1, opens every locker. Then the second student, S2, begins, with the second locker denoted L2, and ..
Determine the range of H0, in oersteds, where an extraordinary wave (polarized in x, propagating in z) will be cut off. The frequency is 4 GHz.
What is the (approximate) maximum electric field intensity for which constant mobility may be assumed for electrons in silicon In a digital circuit with a supply voltage of 1V, what is the corresponding gate length for MOS transistors
An inverting op amp has Ri = 20 k Ohms, Rf = 500 k Ohms, and Req (resistor between + input terminal and ground) = 19 k Ohms. How much does the offset voltage increase if Req is replaced by a short circuit
A 220 V, 1500 rpm, 11.6 A (armature current) separately excited motor is controlled by a single phase, full wave SCR converter. The armature resistance of the motor is 2 ohm. The ac source voltage is 230 V (rms) 60 Hz.
The frequency stability required for an amplitude modulated (ASK) optical coherent communications system is ±10 MHz.
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