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A panasonic model Rx-ft560 stero uses a 12V_dc powwer supply. At full volume ( max triple min-bass) A max current of 1.4 amps is needed from the power supply. at min volume, this drops to 200mA. (hint: calculate the range of R_L)
Design a full wave rectifir power supply using a 9.52:1 transformer. Assume that the outlet is 120V_rms at 60Hz further assume that the diode drop, V_d(on) is 1v
pick the value of C_L such that V_o has a maximum ripple of 1 Vp_p
Solve for the average value of V_o = V_o
(this may be greater than 12v) and I_d(avg)= I_d
B) Add a series resistor to the secondary to limit the maximum source current to 10 amp if the secondary winding resistance is 0.4 ohms .
1) Two signals are said to be orthogonal if the integral of the product of the signals is 0 over one period of the new (multiplied) signal. Assume x(t) and y(t) are orthogonal energy signals with energy, Ex and Ey, respectively.
Sketch the amplitude spectrum of a DTMF signal with finite duration. You should make this sketch by hand, using the Fourier transform expression obtained in part 1). What happens to the DTMF spectrum when T is "too small"
A silicon (ni= 10^10 cm^-3) p-n junction diode has a maximum electric field of -10^6 V/cm and a depletion layer width of 1 um. The acceptor density in the p-type region is four times larger than the donor density in the n-type region.
1. What is the effect of increasing the quantization levels on the quantization error in a PCM signal 2. How can we increase the data rate in a digital signal
The mass spectrometer measurement section is a region of uniform magnetic field B= ˆxBms for z > 0. Ions enter the magnetic field (which exists for z > 0) at the origin with a known velocity +ˆz vz.
What are the distinguishing features of the response in the pass-band? What are the distinguishing features of the response in the stop-band? What is an all pass filter?
This document is shown a paper on Orthogonal frequency-division multiplexing with advantages, disadvantages and uses.
For an RC circuit with a time constant of 1.0ms and assuming switch was closed at t=0, i) What is the time for the voltage across resistor to equal 10% of its initial value ii) What is the time for the voltage acro..
A 4KHz audio signal is transmitted by using a PCM system and the quantization level, L is 256. Find transmission bit rate.
Looking at feedback and some Opamp problems, If the unity gain frequency is 5 MHz and the midband open-loop voltage gain is 200,000, what is the cutoff frequency?
A charged particle starts from rest at the origin of coordinates in a region where there is a uniform electric field E parallel to the x-axis, and a uniform magnetic flux density B parallel to the z-axis. Show that the coordinates of the particle ..
An a.c. voltage, V, comprises of a fundamental voltage of 100 V rms at a frequency of 120 Hz, a 3rd harmonic which is 20% of the fundamental, a 5th harmonic which is 10% of the fundamental and at a phase angle of 1.2
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