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A telephone-answering machine has a switch on it that activates the response message "After the tone, leave a message" after one, two, or four rings. The incoming signal is a burst of 24 V, 20 Hz AC voltage. Design a logic circuit that will count the rings and furnish signals to the triple-pole-signal throw switch.
A 5-volt intelligence amplitude causes the frequency to change to ± 25 kHz. What will be the carrier frequency variation corresponding to an intelligence amplitude of 10 volts.
An angle-modulated signal with carrier frequency ???ωc=2πx106 is described by the equation φEM(t) =10cos(ωct +0.1sin200πt) (a) find the power of the modulated signal. (b) find the frequency deviation Δf. (c) find the phase deviation ΔΦ.
In use its arms are stretched to three times their original length before release. Assume the the modulus of rubber is 10-3 GPa and that it does not change when the rubber is stretched. How much energy is stored in the catapult just before release
There are three numbers stored in Memory Locations 10-12. Write a machine language program to load each number in the accumulator one at a time. Use the immediate addressing mode to add four to each value that is loaded to accumulator.
A receiver requires 20 mW as input power. If all the system losses add up to 40 dB, then How much poweer is required from the source
Two transistors, fabricated with the same technology but having different junction areas, when operated at a base-emitter voltage of 0.72 V, have collector currents of 0.2 mA and 12 mA. Find Is for each device.
A capacitor of value C=10 uF(microfarads: where 1 uF=10^-6 F) has a voltage of 2 volts across it. Calculate the amount of charge Q,in coulombs,on each plate.
Create a vector containingsamples of the signal y(t)=x(t-5) for a=0.01 and T=10 over therange t=[0: a :T-a]. since x(t) is effectively zero for|t|>5, you can calculate CTFT of gthe signal y(t)=x(t-5) fromthe above analysis using N=T/a.
Is connections in transformer are mains connected with the transformer or winding connections If it is mains connections then how can we connect zig-zag transformer in delta configuration
A president, secretary, and treasurer are to be chosen from a group of 10 senior members of the IEEE student chapter at the Citadel. Assume that each member cannot serve more than one position. How many different choices of officers are possible
When placed in series a coil and capacitor resonate at a fequency of 2251Hz and when placed in parallel they resonate at a frequency of 2228Hz. At parallel resonance it is also found that a current of 0.005A flows from the supply when the supply i..
explain how you would modify a 4-bit adder circuit to turn it into an Adder/Subtractor circuit. Explain how your creation would do a subtraction operation. Use a circuit diagram to illustrate. For an Adder/subtractor that works with signed numbers
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