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Q. Explain about Diodes?
A single pn-junction with appropriate contacts for connecting the junction to external circuits is called a semiconductor pn-junction diode. The fundamental building block upon which all semiconductor devices are based is the pn-junction. The most common two-terminal nonlinear resistor is the semiconductor diode, whose symbol is shown in Figure (a). The terminal voltage and current are denoted by vD and iD, respectively. The physical structure of the pn junction is shown in Figure (b). The junction is made by doping the two sides of the crystal with different impurities. Figure (c) shows the volt-ampere curve (or static characteristic) of the ideal (or perfect) diode. Note that when vD is zero, iD is not and vice versa, a condition corresponding to a switch. A diode acts like a switch that closes to allow current flow in the forward direction, but opens to prevent current flow in the reverse direction. The diode thus acts like a unilateral circuit element providing an on-off characteristic.
What are the Rules of Timescale directive Rules - 'Timescale directive, like all compiler directives, affects all modules compiled after directive, whether in same fi
EPROM contents can be erased by exposing it to ? Ans. By exposing EPROM contents to Ultraviolet rays, it can be erased. The Ultraviolet (UV) light passes throughout a window i
Advantages of MPI: Every process has its own local variables It can be used on a broader range of problems than OpenMP It runs on either distributed or shared memor
Receive a message. tid is integer task identifier of transmitting process supplied by user and msgtag is message tag supplied by user( must be non negative integer). The process re
What are the different methods used for handling the situation when multiple interrupts occurs? 1) Vectores interrupts 2) Interrupt nesting 3) Simultaneous Requests.
Error detecting method that can detect more errors without increasing additional information in each packet is? Error detecting method which can detect more errors without rais
Translation Look aside Buffer : A TLB is a cache that holds only page table mapping If there is no matching entry in the TLB for a page ,the page table have to
Q. Describe Message Passing Model? In message-passing model there be a set of tasks which employ their own local memories at the time of computation. Many tasks may inhabit on
CONTROL SECTION: The control section directs the flow of traffic (operations) and data. Also it maintains order within the computer. The control section chooses one program sta
hrm digrams
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