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Q. pn-Junction under Bias?
Let an external source be connected between the p- and n-regions, as shown in Figure (a). (b) shows the circuit representation of the pn-junction or diode, and its external circuit. The voltage source V, called the bias, either decreases or increases the potential barrier, thereby controlling the flow of carriers across the junction. With V = 0, the barrier is unaffected and the pn-junction has zero current. Positive values of V, known as forward biasing, decrease the potential barrier, thereby increasing the number of electrons and holes diffusing across the junction. The increased diffusion results in a net current, called the forward current, from the p-tothe n-region. With increased V, the forward current further increases rapidly because the barrier is reduced even further.Making V negative (reverse biasing), on the other hand, increases the potential barrier and reduces the number of carriers diffusing across the boundary. The drift component produced by the electric field from the n-tothe p-region causes a small current, called the reverse current (or saturation current) IS. The magnitude of the saturation current depends on the doping levels in the p- and n-type materials and on the physical size of the junction. Increasing the reverse bias, however, does not affect the reverse current significantly until breakdown occurs.
consider a single stage ce amplifier with rs=1kohm,r1=50ohm,r2=2kohm,rc=1kohm,rl=1.2kohm,hfe=50,hie=1.1kohm,hoe=25microamp/volt and hre=2.5*10-4
Human Resources - KPI It is the responsibility of management to have the lean, capable, customer friendly organization that strives for catering to diversified need of all the
assume that the top of the stack in the program is pointed by the register sp.
when i/p voltg is grater than battery diode is clse or open
Q. Designing 100 line exchange using Uni-selector? Here three different designing methods for 100 line exchange are discussed: Design: Strowger switching system is designe
For a given logic family, consider VOL = 0.25V and VOH = 5 V . For a given circuit, VIL = 0.96 V and VIH = 2.18 V. Find the largest positive-going and largest negative-going nois
Q. A silicon diode is forward-biased with V = 0.5 V at a temperature of 293 K. If the diode current is 10 mA, calculate the saturation current of the diode.
Q. Explain common collector configuration? It is called the common-collector configuration because (ignoring the power supply battery) both the signal source and the load share
Write a short summary of the AM superhet receiver, in exacting consider how the demodulation stage works, and remark on the choice of component values used.
Fields Winding It produces the working flux, this is also called exciting winding.
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