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Modify the design in Figure 7.8 to provide separate instruction and data memories for the 8051: a 64K × 8-bit ROM for the instruction memory and a 64K × 8-bit asynchronous SRAM for the data memory. The ROM has the same control signals as the SRAM except for the
signal.
A 3 phase 50hz star connected motor has rotor resistance and stand still reactance of 0.025ohm and 0.35 ohm respectively. The full load slip is 5% calculate the resistance per phase of a star connected rheostat
A phase modulation is used to transmit the signal s(t) = 10cos(20*pi*t) + 5sin(10*pi*t). kp = 3 rad/volts and fc = 20MHz a) What is the instantaneous frequency of the signal b) Write down the expression of the transmitted signal.
a capacitor, an electric resistance heater, and an impedance are connected in parallel to a 120 volt, 60 Hz. system. the capacitor draws 50 VARs, the heater draws 100 watts and the impedance coils draws 269 VA at a power factor of 0.74 lagging.
A silver-coated sphere of radius 5 cm carries a total charge of 12 nC uniformly distributedon its surface in free space. (a)Calculate |D| on the surface of the sphere and (b)external to the sphere
120V, 60 Hz source is connected to a distribution line whose resistance, and inductive reactance is 0.001Ohm, j0.002 Ohm, respectively. Single phase, 100HP, 120V, 0.85 pf. motor; and 100Kw, 120V heater are connected in parallel.
Consider the parallel inductors shown in Figure P3.61, with mutual coupling and the dots at the top ends of L1 and L2. Derive an expression for the equivalent inductance seen by the source in terms of L1, L2, and M.
Stepper motors are often used in low-power servomechanisms such as those found in small robots, computer printers, and other precision electro-mechanical machines. Explain why this type of electric motor is more popular than permanent-magnet DC mo..
What is the magnitude of the frequency component at 30 kHz? The square wave is passed through an ideal rectangular low pass filter that completely attenuates all frequencies higher than 35 kHz. Write down an equation for the spectrum at the output ..
1. Express the Boolean function f(X,Y,Z) = XY + X(Y + Z) in sum of products form showing the sum all nonzero minterms. 2. Express the Boolean function f(A,B,C,D) = A(B + BC) + ACD in sum of products form showing the sum all nonzero minterms.
An engineer intends to study an input signal with frequency components of 5, 6, and 10 kHz. It is desired that all other frequencies be filtered out. A) What kind of filter does this require
What is the advantage of using a double-break contact instead of a single-break contact?
Describe what changes the engineer should make to either the flow rate of the coolant or the steam to keep the system functioning optimally.
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