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An RF input signal at 1800 MHz is down-converted in a mixer to an IF frequency of 87 MHz. What are the two possible LO frequencies and the corresponding image frequencies?
Draw the circuit of a summing amplifier with four inputs.
Consider a cellular phone transmits data using QPSK with achannel rate of 50 Kbps, (a) what is the data rate provided (b)What is the difference between PSK and QPSK.
Why developing software for wireless devices is challenging? List and briefly describe the two (2) reasons given in your textbook for why developing software for wireless devices is challenging.
(1) Can we have Darlington transistor made up of an NPN and a PNP or do the two transistors have to be of the same type (2) Amplifiers has a power gain of 1,000 or 30dB. Where is that power coming from
Half of the area within the plates is filled with paper and the other half is filled with air.
At what forward voltage does a diode conduct a current equal to 1000 Is. In terms of Is, what current flows through the same diode when its forward voltage is 0.7V.
A person accidentally grabs conductors connected to each end of adc voltage source, one in each hand. Assume that the resistance of an arm is 400Ohms, the resistance of a leg is 200 Ohms and the resistance of the trunk is 50Ohms.
Two loads are connected in parallel. The voltage across the loads is 8kVrms. The first load is rated at 12 kW with a 0.6 lagging power factor. The second load is rated at 20 kVA with a 0.8 lagging power factor. Find the complex power of the two lo..
What would you predict the cycle time would be if the cut-in and cut-off points were respectively changed to 86° and 88°?
In the given image, determine the voltage and the voltage polarity across R2 just after the switch S1 is opened. Steady state conditions have occurred in the circuit just before switch S1 is opened.
To put this number into perspective, on June 20, 2002 the US national debt was $6.1e12, which is about $21,000 for each of the 288 million US citizens. What number when multiplied by the US national debt equals the cost to toast the bread.
Laplace transform of a pulse, Consider computing the Laplace transform of a pulse: use the integral formula to find P(s)
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