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A 12 Ω resistor is connected in parallel with a 15 Ω resistor and the combination is connected in series with a 9 Ω resistor. If this circuit is supplied at 12 V, calculate
(a) the total resistance,
(b) the current through the 9 Ω resistor and
(c) the current through the 12 Ω resistor.
An AM signal is written as xc(t) = Ac (1+ µx(t))cos(2pi*fc*t) where fc is the carrier frequency, Ac is the carrier amplitude, µ is the modulation index, and x(t) is the baseband message signal. We assume that x(t) has absolute bandwidth W
Use block diagrams to illustrate the following systems and make appropriate labeling: (a) y(t) = x(t) ∗ [h1(t) ∗ h2(t)] + h3(t);
Inverse Z-transform and poles and zeros. When finding the inverse Z-transform of functions with z-1 terms in the numerator, the fact that z-1 can be thought of as a delay operator can be used to simplify the computation.
A combinational circuit is defined by the following three Boolean functions. Design the circuit with a decoder and external gates. f = x y z + xz g = x y z + xy h = x yz + xy
Why is this particular case called cyclic? Show some examples to illustrate your answer.
An amplifier operating from +/- 12 V power supplies has alinear transfer characteristic except for output saturationat+/- 11.4 V. a) The peak-to-peak value of the largest sinusoidal wave thatcanbe applied at the amplifier input without output dist..
Determine the transfer function of the second-order (2 poles) lowpass Butterworth filter with a 3 -dB cutoff frequency of 5 kHz. Design it using the Sallen-key Lowpass filter configuration, find all the values of the circuit element
Design a circuit with which you can reproduce the experiments in Illustration 45. You will obtain the burst signals, using the "Cut out" module, by cutting out a periodic sinusoidal signal in the time domain using this module.
A series circuit consisting of a 0.398-henry inductor and a 212-µF capacitor is connected to a 125-volt variable frequency source. At what frequency will the circuit take a lagging current of 2.5 A
Consider a passive single-pole RC low pass filter. Describe the various hierarchical representations of the filter in terms of "layers" as discussed earlier in the chapter.
A chopper working from a220 V.d.c. source is operating at frequency of 50 Hz. and is connected to an R L load of R = 5 Ω and L = 40 mH. Determine the value of duty cycle at which the minimum load current would be 10 A.
Discuss why phasor analysis can only be performed on single-frequency circuits. For multiple frequencies what type of analysis must be performed
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