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The phasor voltage across a certain load is V = 1200√2 <-120deg V, and the load impedance is Z = 40 - j30 Ω. Determine the power factor and state whether it is lagging or leading.
The campus bus uses an embedded system that tracks the number of passengers getting in and those getting out of the bus. Two circuits with laser photodiodes, connected to RB0 (getting in) and RB1 (getting out), are used to track these numbers.
Consider an InGaAs APD with excess noise x=0.7, M=10 where M is the multiplication factor. The unmultiplied dark current is 10 nA and bandwidth is 700 MHz. What is the avalanche photodiode noise current per square root of bandwidth
Using Multisim, design a mod-100 BCD counter that drives a 2-digit, 7-segment display. The count sequence will be 0 through 99. Blank leading zeros in the tens digit of the display.
A 300 W resistor is connected across the 300 Wantenna input of a television receiver. The bandwidth of the receiver is 6 MHz, and the resistor is at room temperature (20oC). Find the noise power and noise voltage applied to the receiver input.
First draw the transmit con-stellation and the receive constellation with ideal phase tracking and sampling. Note:they are obviously the same constellations. Now, assume that receiver synchronization is off by a phase angle.
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.
Why can't a video signal such as an NTSC analog television signal be transmitted over a two km length of loaded twisted pair cable with a frequency range 300 Hz to 3,400 Hz? What is the bandwidth occupied by an NTSC video signal?
a 1.5 V battery will deliver 9mA for a continuous 38 hrs. during that time the voltage drop will be from 1.5 to 1.0 V. Assume the voltage drop is linear. How much energy does the battery deliver over the 38 hr interval
Assuming that directions of arrival are uniformly distributed at the mobile, how large is the correlation coefficient for a GSM 900 system between the channel in the middle and the end of the burst when the mobile station moves at 200 km/h
Consider a 32-bit data bus in a chip. Assume each bit has P0 = 0.2 and P1 = 1 P0 = 0.8 and all the 32 bits are statistically independent from each other. Estimate the power saving when we use the bit-invert technique.
R1=1k ohms, R2=1.5k ohms and R3=3k ohms. Assume an ideal opAmp. Indicate the PEAK current in each of the resistors.
Compute the energy of the following signals: 1) x(t) = e^-(a|t|) for a > 0 (Notice the absolute value on t) 2) x(t) = (1 - |t|)rect(t/2) (Notice the absolute value on the first t)
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