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A lossy line at temperature T feeds an amplifier with noise figure F, as shown below. If an impedance mismatch is present at the input of the amplifier, find the overall noise figure of the system.
In a Wheatstone bridge circuit, precise measurements of very small resistance (0.1 ohm or less) are difficult. List three (3) possible sources of error that are important when measuring small resistances.
The purpose of this problem is to show you the connection between Fourier series and linear algebra. For simplicity, we will consider a finite basis. All questions will be referred to the following basis B = {1, sin(400t), cos(400t), sin(800t), cos..
An RLC circuit consists of a 25 mH inductor, a 0.001 µF capacitor and a variable resistor connected in series. The initial charge on the capacitor at t = 0 when the switch is closed is 1 mC. What is the critical resistance Rc for this circuit.
How to Prevent the high Inrush Current in Capacitor Switching? And what the Methods To Insert capacitors in order to prevent inrush current ?
Consider a superheterodyne FM receiver designed to receive the frequency band of 88 to 108MHz with IF frequency 10.7MHz. What is the range of frequencies generated by the local oscillator for this receiver
Discuss the possible difficulty of such an approach.
Find out the frequency components at the output of a resonant-tuned circuit tuned at 1200 KHz with a bandwidth of 15 KHz and connected at the output of a non-linear amplifier (mixer).
A concentric cable has a core diameter of 10 mm. The inductance of the cable is 4 *E-7 H/m. Ignoring inductance due to internal linkages, determine the diameter of the sheath. Assume that the relative permeability is 1.
Two resistors are given: R1 = 470 ohms and R2 = 1.20 k ohms. (a) The two resistors are connected in series with a 48 V source. Calculate the series equivalent resistance. Sketch the schematic diagram of the circuit with the two resistors.
A copper wire has a resistance of 2.00 ohms at 20 degreesCelsius, what is it's resistance at 70 degreesCelsius
For a device with a failure probability of 0.02 when subjected to a specific test environment, use the binomial distribution to calculate the probabilities that a test sample of 25 devices will contain (a) no failures; (b) one failure; (c) more th..
An amplifier has an open-circuit voltage gain of 100. With a 10-KOhm load connected, the voltage gain is found to be only 80. Find the output resistance of the amplifier.
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