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A student attempts to construct a non-inverting logarithmic amplifier as illustrated in Fig. 8.59. Describe the operation of this circuit.
Implement the following Boolean function with an 8-to-1-line multiplexer and a single inverter with variable D as its input: F(A,B,C,D)= Em(2,4,6,9,10,11,15)
Formulate the differential equation model for a motor having inductance L and rotational inertia J, and electrical resistance Rw and frictional resistance Rf, driving a frictional load, Rl.
a) How long does it take for the soprano's voice to reach the listener b)In the same time interval, how far form the soprano has the sound wave in the auditorium traveled. Take the speed of sound to be 340 m/s.
A positive sequence three phase source has Van(t)= 200cos(wt+120) V. Find time domain expressions for vbn(t), Vcn(t), Vab(t), Vbc(t), and Vca(t).
The following test data were obtained from short-circuit and open circuit tests of a 5-kVA, 2400-600V, 60Hz transformer. Voc=600V Ioc=3.34A Poc=484W Vsc=76.4V Isc=20.8A Psc=754W
input voltage to an amplifier is: Vi(t)=0.1*cons(2000*pi*t+30) and the output voltage is: Vo(t)=10*sin(2000*pi*t+15) Find the complex voltage gain of the amplifier at f = 1kHz and express the magnitude of the gain in decibels.
Extension cords which are designed to carry heavier loads are generally larger in diameter than those which are not. Is this just a matter of adding more insulation, or is there a physical principle at work causing the larger diameter? Explain.
The SCR in Figure 1 below requires a 3 V trigger. Using Multsim, design a system by which the gears are shifted when a CdS photocell resistance drops below 4k.
The nameplate on a 50 kVA transformer shows a primary voltage of 480 V and a secondary voltage of 120 V. We wish to determine the approximate number of turns on the primary and secondary windings.
Design an Ag/AgCl electrode that will pass 150 mC of charge without removing all the AgCl. Calculate the mass of AgCl required. Show the electrode in the cross section and give the active area.
A certain amplifier has pole frequencies of f1=f2=f3=50MHz. The DC open-loop gain is 10^5. Find the pole frequency fc for the fourth pole so that the phase margin is 30 degrees for beta = 0.1 Also, find the corresponding gain margin.
A sighnal must be transmitted over distance L. You can use aguided (attenuating) medium, like a coaxial cable, or radiation(dissipating) from an antenna. Testing the two media reveals: (a)on the coaxial, transmit power = 20 dBm
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