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Design a 7.5-V zener regulator circuit using a 7.5-V zener specified at 12mA. The zener has an incremental resistance r(z) = 30 ohms and a knee current of 0.5mA. The regulator operates from a 10-V supply and has a 1.2k-ohm load.1)What is the value of R you have chosen?2)What is the regulator output voltage when the supply is 10% high?3)Is 10% low?4)What is the output voltage when both the supply is 10% high and the load is removed?5)What is the smallest possible load resistor that can be used while the zener operates at a current no lower than the knee current while the supply is 10% low?6)What is the load voltage in this case?
Design limiter circuits using only diodes and 10-k ohm resistors to provide an output signal limited to the range: (a) -0.7V and above (b) -2.1V and above (c) ±1.4V Assume that each diode has a 0.7-V drop when conducting.
1. design a simple power factor meter to operate from 230v mains. current range=1 to 10 amps. power factor range : 0.4 to 1 2. what is meant by normal mode rejection an A/D converter has 20ms integration time.
Design an active low pass filter with a cutoff of 10kHz or more by more than 30db and have the pass band gain positive that does not deviate from 20db by more than 3 db. The pass band frequncy need is 800Hz and below.
The output/ input of a system is 30dB. detrmine the ratio Express x(t)=4*cos(100*t-45)+ 2*cos(250*t+30) in terms of exponential functions Then Detrmine the phase angles(in degrees) of the two frequency components of x(t).
A sinusoidal current is zero at t = -0.625 s and increasing at a rate of 8000pi A/s. The maximum amplitude of the current is 5 A. a. What is the frequency of i in radians per second b. What is the expression for i
A capacitor is made with very large plates separated a distance d. The potential between the plates is V=1000 volts and d = 1mm. a) Calculate the pressure the plates exert on the air between the plates.
If L=0.0053nH, C=15µF find the operating frequency of series LC circuit. What factors decides capacitance? Explain using diagram.
the circuit has been connected for several seconds, find current in (a). in the 4.00 volts battery, (b). in the 3.00 ohm resistor, (c). in the 8.00 volts battery, (d). in the 3.00 volts battery and (e). find the charge on the capacitor?
Electrical wiring: Potentials of neutral and earth wires, Why is the neutral wire in housing circuits also at zero potential
A solar pond consists of a thin layer of fresh water floating on top of a denser layer of salt water. When the salty layer absorbs sunlight it warms up and much of that heat is held there by the insulating effect of the fresh water above it
Determine the conductivity of silicon at T = 300 K if it is doped with donor impurity atoms at a concentration of 1.25*1016 cm-3. Assume that the electron and hole mobilities are 1350 cm2 / V-s and 480 cm2 / V-s, respectively.
What is the symbol rate and what is the bandwidth occupied by the 16-QAM signal? The link must maintain a BER no higher than 10^-6. What is the minimum CNR in the receiver to meet this requirement?
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