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From a source with Pin = 2.4 mW, we want to get Pout = 60 mW at a distance l = 20 km from the source. α for the transmission line is given to be 2.3 dB/km. The available amplifiers have adjustable power gain, but are subject to two limitations: (i) the input signal power must be at least 1 µW to overcome internal noise, and (ii) the output signal power must not be greater than 1 W to avoid nonlinear distortion. Design an appropriate system.
Simplest equivalent circuit topology using lumped elements: For each of the Smith chart traces below, sketch (at the right of each chart) the simplest equivalent circuit topol
Q. Cause of sparking at the brushes of a DC Motor? Ans: Sparking at the brushes can be occur due to poor quality of carbon brushes, loose connection, poor armature of carbon
Q. Give a brief description of differentiating circuits ? Differentiation is a measure of the rate of change. A differentiating circuit produces an output voltag
Octal Number Systems Now the question may arise in one mind that why to learn octal number system when neither human nor the digital systems uses. It hence it is
1. A self excited shunt generator supplies a load of 12.5 kw at 125 volts. The field resistance is 25 ohms and the armature resistance is 0.2 ohms. The total voltage drop because o
Q. Using the small-signal equivalent circuit of a BJT with gm = 0.03 S, β = 75, and VA = 65 V, a load resistor RL is connected from the collector to the emitter, as shown in Figure
Q. Determine v o /v i for the circuit shown in Figure if the op amps are ideal.
The circuit shown below is a DC charging and discharging circuit. a. At t = 0 sec, switch S1 is thrown to position 1 ("pos1"). Write the mathematical expressions for and .
Q. What do you mean by Lumped-circuit elements ? Electric circuits or networks are formed by interconnecting various devices, sources, and components. Although the effects of e
biography of scientists in different branches
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