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Q. Write a short note on heat sink
For transistors handling small signals ,the power dissipated at the collector is small.Such transistors have little chances of thermal runaway .However in power transistors ,the power dissipated at the collector junction is larger .This may cause the junction temperature to rise to a dangerous level .We can increase the power handling capacity of a transistor if we make a suitable provision for rapid conduction of heat away from the junction .This can be achieved by using a sheet of metal called heat sink.As the power dissipated within a transistor is predominantly the power dissipated at its collector base junction ,sometimes the collector of the power transistor is connected to its metallic base The case of the transistor is then bolted on to a sheet of metal .The sheet serves a heat sink. Connecting heat sink to a transistor increases the area from which heat is to be transferred to the atmosphere .Heat moves from the transistor to the heat sink by conduction ,and the it is removed from sink to the ambient by convection and radiation.
The resistance of a 5 m length of wire is 600Ω.Determine: a) the resistance of an 8 m length of the same wire, b) the length of the same wire when the resistance is 420Ω
Saturation and Cutoff in bipolar junction transistor: Saturation : With both of the junctions forward-biased, a BJT is in saturation mode and makes easy high current condu
Q. Can you show Binary Number Formats? We in general write binary numbers as a sequence of bits (bits is short for binary digits) and we have defined boundaries for these bits.
Discrete Systems Control: cat and mouse example with 4 rooms using petri nets
Ask question #Madvantages of 4 bit binary adder inimum 100 words accepted#
In my designed analog circuit,efficiency is measured at steady state or transient state of my output node? Efficiency of MOSFET circuit given in datasheets of any product is measur
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For sign flag RP ( Return on Plus ) and RM ( Return on no minus ) Instructions RM returns from the subroutine to the calling program if sign flag is set (S=1). The in
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