COMPARISON OF A SINGLE STAGE AND TWO STAGE CASCADE COMMON EMITTER AMPLIFIERS’ GAIN AND BANDWIDTH
Abstract
ABSTRACT
Anamplifierisanelectronicdevicesthatincreasesthevoltage,currentorpowerofasignalwhichisusedin
wirelesscommunication,broadcastingandinaudioequipmentofallkinds.Amplifieroftenhavemultiple
stagesincascadetoincreasethegain.Inthiswork,wediscussedtransistorsandamplifiersingeneral.Thed
xi
esignandstudyoffrequencyresponseofasinglestageandtwostagecascadecommonemitteramplifierswerecarriedout.Theinputandoutputcharacteristicsweredete
rmined.Weusethevaluesobtainedfromthecharacteristicsandtherelevantequationstodesignthetwoam
plifiersusingMultisim8.0software.Thegainandbandwidthofthesinglestageamplifierwereobtainedto
be43.52dBand30075993.1Hzwhilethegainandbandwidthofthesecondstagecascadeamplifierwasob
tainedtobe47.8dBand2210391.2Hzrespectivelybycomparingtheresultobtainfromthetwoamplifiers,
itclearlyshowanenhancementinthegainbutattheexpenseofbandwidth.Theresultareinagreementwith
theoreticalexpectation.Thiswillhelpinthedesignofcommunicationdevices
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