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a. A mechanical switch, having silver contacts, is used to control a 24-V dc relay with a winding resistance of 240 Ω and inductance of 10 mH. If the switch contacts are protected by an R-C network, what value resistor and capacitor should be used?
b. If a 100-Ω resistor is used in the contact protection network, then what value capacitor would be required for the protection network to be non-oscillating (over damped)?
Design a DC power supply that provides -95v +/- 5v to a 2 amp load (energy absorber). The input source is a 100 volt peak sinusoid, 60 Hz. You may use any basic circuit element. State the values of all circuit elements (in ohms, farads, etc).
A Zener diode specified as follows: VZ=6.8V at IZ=5mA, rZ=20Ω,IZK=0.2mA. The Zener is operated in a regulatorcircuit having a 9V ± 5% supply and a load varying from 2mAto 10mA. Find the value of R for which the minimum Zener current is 21ZK.
A 2-V-peak sine wave signal is converted to digital form by a 12-bit ADC that has been designed to accept signals ranging from -5V to +5 V. (In other words, code words are assigned for equal increments of amplitude for amplitudes between -5V and ..
suppose that the sequence 110010011 is used as a synchronization sequence preamble to a data packet. propose a method
A strain gauge has a GF=2.14 and a nominal resistance of 120 Ohm . Calculate the resistance change resulting from a strain of 144µin / in .
A 35 kVA transformer supplies a load of 12 kW at a power factor of 0.45 lagging. Find the percentage of full load the transformer is carrying. If additional unity power factor loads are to be served with the same transformer,
Suppose that we want to design an amplifier that can produce a 100-kHz sine-wave output having a peak amplitude of 5 V. What is the minimum slew-rate specification allowed for the op amp?
Design a 4-bit serial equality comparator. That is, if we have a3a2a1a0 = b3b2b1b0, then eq = 1. Note that a3a2a1a0 is stored at register 1, while b3b2b1b0 is stored at register 2. You have to implement the same function using a serial equality co..
For a low pass Chebyshev Type I with a pass band edge gain = -2 dB and a stop band edge gain = -40 dB, find the linear gain at the edge of the stop band.
A load impedance ZL = 100 + j80 is to be matched to a 75 ohm line using a single shunt-stub tuner. Find two designs using open-circuited stubs. Include both smith chart and analytical analysis.
At furnace start-up the wall is at an initial temperature of Tj = 300 K, and combustion gases at T8 = 1300 K enter the furnace, providing a convection coefficient of h = 25 W/m2 · K at the ceramic film. Assuming the film to have negligible thermal..
Write down an expression for the pdf of Z.
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