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A designer wishes to use a simple modification of the circuit of Fig 2.20 on page 86 of the Text to implement a centre-zero voltmeter whose scale ends are Il volt. The meter movement provided is a 0 to I mA unit with a resistance of 50 U. Her boss suggests that a solution is possible using a single additional resistor and one of the ±10 V supplies from which the op amp is powered. What is the value of the additional resistor? To what supply is it connected? To what circuit node is the additional resistor connected? What is the required value of R?
A 15hp, 440V, 1250rpm separately excited dc motor draws 30A atrated load. The no-load current is 5A. The armature resistance is0.8ohms. Consider that the rotational losses(core+mechanical) areproportional to the speed.
First transform all the current sources to a voltage then by using mesh and nodal analysis, find I1 and I2 for the fig.
For a complex load of 30 - 50 j ohm. find the matching circuit consist of ideal capacitor and/or inductor to match the load to 50 ohm impedance at 2GHz. The solution should include circuit schematic and values of each component.
Calculate explicitly all the optimal joint power allocation and decoding policies to maximize the sum rate. Is the optimal solution unique? Hint: Clearly there is no benefit by allocating power to a user whose channel is fully faded (the zero ampl..
if we have an amplifier whose spec. is 2nV/rtHz and the bandwidth of the amplifier extends from 100Hz to 10kHz, and the gain of the amplifier is 5, how much noise should we expect at the output of the amplifier
The transformer is to be used on a 50 Hz system, with the restriction that it maintain the same maximum core flux and the same total losses. Determine (a) the new voltage rating; (b)the new kVA rating.
If the telephone instrument has a resistance of 200 ohms when off hook and represents an open circuit when on hook calculate the combined resistance of the local loop and the power source at the central office.
A student from electromechanical systems class planned to construct a transformer that will cause an actual load resistance of 48.2-ohm to appear as 116.3-ohm to an AC voltage source of 211.3 V rms.
Perform the subtraction of these two unsigned binary numbers manually: 1100011010101 - 0110101101100
Draw a diagram for a MOD-10 Johnson counter using a 74HC164. Makesure that the counter will start the proper sequence when it isturned on. Determine the count sequence for this counter and draw the decoding circuit needed to decode each of the 10 ..
Enclose the binary counter with parallel load of in a block diagram, showing all inputs and outputs. (a) Show the connections of four such blocks to produce a 16-bit counter with a parallel load. (b) Construct a binary counter that counts from 0 thro..
EXPLAIN ONE WAY OF ACHIEVING SYNCHRONIZATION IN PAM,PDM AND PPM
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