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(a) What sources of error can arise if the block length and the sampling frequency are not in an integer relationship to each other?
(b) Cut out from a longer speech signal a short segment, for example, of 0.07s in length and limit the bandwidth of this segment on account of the sampling principle. Analyze the frequency domain of this signal with different sampling rates and block lengths. Discuss the differences in the spectral representations. Which of these clearly show errors? What is behind this?
A lightning bolt carrying 30,000 A lasts for 50 micro-seconds.If the lightning strikes an airplane flying at 20,000 feet, what is the charge deposited on the plane
List the general steps that a digital controller program follows.
Consider a circuit consisting of a voltage source in series with a 1-Henry inductor and a 0.25-Farad capacitor. Assume all initial conditions are 0. Compute and plot the capacitor voltage vc(t) for the following input signal at the voltage source.
Suppose instead that the current is only about 100,000 A. Then theoretically we should expect that only 100,000/(2*F)=0.52 moles of hydrogen is going through the system. However, due to leakage, crossover, and other losses the theoretical amount i..
A pulse width modulation (PWM) circuit works by varying the duty cycle of the square wave while keeping the period fixed.
An underdamped sensor with a static sensitivity of K=1, undamped natural frequency of omega=1400 rad/s, and damping ratio of zeta=0.5 is used to measure a sinusoidal signal with a frequency of 6 kHz.
What is the equivalent (total) resistance of 100, 200, and 50 resistors connected in series What is the equivalent (total) resistance of 100, 200, and 50 resistors connected in parallel
Sketch the equivalent circuit referred to the low-voltage side of one phase of this transformer. Calculate all the transformer impedances referred to the low-voltage side.
A 100hp, 60Hz, three-phase induction motor has a slip of 0.03 at full load. Compute the efficiency of the motor at full load when the friction and windage losses are 900W, the stator core loss is 4200W, and the stator copper loss is 2700W.
A circuit has has 200 ohm, 300ohms, and 500 ohms in parallel and200 ohms, 300 ohms, and 500 ohms resistances in series with the combination. Find the total resistance of the circuit.
A 480-120 volt, 5kVA, 2-winding transformer is to be used as an autotransformer to supply a 480-volt circuit from a 600-volt source. When tested as a 2-winding transformer at rated load, 0.8 pf lagging, its efficiency is 0.965.
Perform an arithmetic shift right by 4 positions on each of the following 2s-complement signed numbers to form a 12-bit result: 100101010000 and 000101001000. In each case, does the result exactly represent division by 16?
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