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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 Zenercurrent is 21ZK.
A three-phase, 13 kV transmission line delivers 8 MVA of load. The per-phase impedance of the line is (0.01 + j0.05) pu,referred to a 13 kV, 8 MVA base. What is the voltage drop across the line
The iron section was attached to the ceiling while the steel section was placed on a horizontal support so that 1-mm airgaps were left between the sections. The mass density of steel is7.8 g/cm3. The students consider triggering therelay using a c..
a. Draw the block diagram for a coherent receiver for QPSK using the same basis signals as in problems ("What frequency must be used for basis symbols f1 = sin(pi*ct) and f2 = cos(pi*ct) with a symbol period of 1/(9600Hz) to contain 6 cycles of th..
The steering wheel has backlash. This means there is a delay between the time the wheel is turned, and the time the car responds. The driver tends to overturn, which leads to instability and lack of control of the car.
design a combinational circuit that has four inputs (ABCD) and one output(Z). The output equals one when the Gray coded number represented by ABCD is less than five. Reduce the function using SOP or POS forms and then partially factor if possible.
Describe the operation of the transmission gate. Consider the source and drain terminals of both the NMOS and PMOS devices. Why not use two NMOS devices Does it pass analog or digital signals
the bridge circuit is energized from a 21 V dc source. the bridge is balanced when R1 = 800Ω, R2 =1200Ω, and R3 = 600Ω. a) what is the value of Rx b) how much current(in milliamperes) does the dc source supply
Germanium is n-type doped at 5x1015 cm-3 at T=300 K. The dimensions of the Hall device are d=5x10-3 cm, W=2x10-2 cm, and L=10-1 cm. The current is Ix=250 A, the applied voltage is Vx=100 mV, and the magnetic flux density is Bz= 500
It is desired to know the design impedence referred to the primary and to the secondary for basic engineering calculations and analysis a. solve for the transformer impedance referred to the primary b. solve for the tranformer impedance referred to ..
Consider the voltage Consider the voltage reference circuit in Figure P9.86. Using a Zener diode with a breakdown voltage of 5.6V, design the circuit to produce an output voltage of 12V. Assume the input voltage is 15Vand the Zener diode current i..
Electric vehicle supercapacitor. a. A 3000 F capacitor has initial voltage 200 V. If the capacitor is discharged at a constant 60 A, what is the voltage across the capacitor during discharge. b. How long will it take the capacitor to discharge to 5..
While it's very reliable, it can only supply a maximum power of 60W. If someone tries to draw more than 60W, the output current is reduced to zero and stays there until someone presses a "reset" button on the supply.
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