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q explain the theory of thermal runaway the maximum average power pdmax which a transistor can dissipate depends
define gray code - bcd to decimal conversionthe gray code is a variation on binary code in which only 1 bit is changed from the preceding number the
explain the excess three codes - bcd to decimal conversionthe excess-3 representation of a number is based on binary coded decimal it is formed by
q give applications of emitter followerthe emitter follower has the following principal applications1 to provide current amplification with no
q what do you mean by feedback in amplificationfeedback feedback in its broadest sense means that a certain amount of the output signal is fed
q what is output impedanceoutput impedance the output impedance of an amplifier is a measure of the impedance or resistance it has nothing to do
q what do you know about input impedanceinput impedance amplifiers will be quoted as having a specific input impedance the sort of load it will
q what is meant by amplificationthe basic amplifying elements are namely valves vacuum tubes bipolar transistors and fets the term amplify basically
q transformer-coupled amplifierstransformer-coupled amplifiers the figure illustrates another type of coupling often used to couple audio frequencies
q explain working of resistance-capacitance coupled amplifiersresistance-capacitance rc-coupled amplifiers the following figure illustrates the
q what are the different types of coupling in amplifiersthe coupling between stages of amplifications may also be used to classify amplifiers there
q write a short note on the frequency response of a r-c coupled amplifierat low frequencies lt50hz the reactance of coupling capacitor cc is quite
q what are the applications of a r-c coupled amplifierthe r-c coupled amplifiers have excellent audio fidelity over a wide range of frequency
q what are the advantages and disadvantages of a r-c coupled amplifieradvantagesmiddot it has excellent frequency response the gain is constant over
q a transistor in a fixed bias amplifier circuit was replaced by another transistor of beta equaling 150 instead of 60if ib of transistor is equal to
q prove mathematically that the operating point does not depend on beta in a potential divider bias circuit to determine the operating point consider
q what is a heat sink list the factors which determine its efficiencyto reduce the chance of thermal runaway the rise of temperature at the collector
q what is meant by thermal runaway in a transistor when current flows through the collector circuit it produces heat at the collector junction this
a hinged object hangs on the outside of a rotating wheel when the object is in the six o3939clock position it needs to be rotated 180 degrees using
what do you mean by variability in oxidation state of transition metals different from that of the non transition metals illustrate with
using nyquist theorem determine the sampling rate for an analog signal with frequencies from 3000hz to 86000hz and for a signal with ahorizontal line
q show binary coded decimal number systemif we analysis single digit values for hex the numbers 0 - f they represent the values 0 - 15 in decimal and
q explain the procedure of binary to hex conversionit is simple to convert from an integer binary number to hex this is completed bybreak the
hexadecimal is of use in it because1 it is a compact system eg only 3 digits represent the number 9862 as 16 are a power of 2 it turns out to be
q explain hexadecimal number systema hexadecimal number systemuses base 16includes only the digits 0 through 9 and the letters a b c d e and fin the