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define johnson counters to produce a time delaythe serial in-serial out shift register can be used as a time delay device the amount of delay able
what are shift register counterstwo of the main common types of shift register counters are the ring counter and the johnson counter and they are
q give the classification of oscillators discuss the frequency stability of oscillatorsoscillators are classified in the following different ways1
q what are the conditions required to be fulfilled to sustain the oscillationsthe conditions required to be fulfilled to sustain the oscillations
q what is barkhausen criterion why is the value of ab kept slightly greater than 1the condition ab 1 is called the barkhausen criterion it implies
what are shift registers - sequential logic circuitthe shift registers are a type of sequential logic circuit that mainly for storage of digital data
explain the advantage of synchronous countersthe most significant advantage of synchronous counters is that there is no cumulative time delay because
q what is the basic principle of oscillation in an rc phase shift oscillator with a neat sketch explain its workingfor producing oscillations there
q why positive feedback is used in oscillatorthe main application of positive feedback is in oscillators an oscillator generates ac output signal
q how oscillations start up in an oscillator the noise voltage produced due to the random motion of electrons in resistors or in active devices
q explain workinf of colpitts oscillatorwhen the collector supply voltage v cc is switched on the capacitors c1 and cz are charged these capacitors
what are the counters1 the counter is a sequential circuit which consists of a set of flip flops connected in a appropriate manner to count the
q what is the significance of source gate cutoff voltagethe source gate cutoff voltage is also called pinch off voltage it is obtained when vds
list out the features of computer memoryfeatures of each type of memory typevolatilewrite ableerase sizemax erase cyclescost per
q explain the drain characteristics of jfet with external biasit gives relation between id and vds for different values of vgswhich is called the
explain the working of static ram - computer memorysram devices tender extremely fast access times approximately four times faster than dram but are
explain the working of dynamic rama plain piece of hardware called a dram controller can be used to make dram behave more like sram and the job of
q draw the common source drain and transfer characteristics of a jfet how are they usefulthe graph below shows variation of the drain current id
q how does current flow through the channel of a jfet after pinch offit is seen that above the pinch off voltage at a constant value of vds
define the difference between static ram and dynamic ramthe ram family comprises two important memory devices that are static ram sram and dynamic
explain electrically erasable programmable rom - computer memorythe next level of erasability is the eeprom which able to be erased under software
explain erasable programmable rom eprom - computer memoryan eprom is a rom that can be reprogrammed and erased a little glass window is installed at
explain the programmable rom prom - computer memorythis is a kind of rom that can be programmed using special equipment it can be written to but only
define programmable logic array amp programmable array logiccombinational ckt is implemented with rom do not care conditions become an address input
q what are the uses of mosfetthe most common use of mosfet transistors today is the cmos complementary metallic oxide semiconductor integrated