ANALYSIS OF SINGLE STAGE OP-AMP

Abstract

Demand iforihigheriperformance iand imore ifunctionality iforihand-held isystemsihave ibeen icontinually igrowing iin ithe irecent iyears. iImproved iperformance iand imore ifunctionality, ihowever, ioften icome iwith imore ipower iconsumption. iThis iis iwhy inew ilow ipower idesign itechniques iand icircuits ihave ibecomeioneiofitheimajorisubjectsiofiresearchiandiinnovation. i Active iRC ifiltersiasia ipart iof imany isystemsithat iare iintegrated ion ithe ichip iare ino iexception. iThat iis itheyimustibeilowipowerianditheiareaithatitheyioccupyionitheisiliconichipimustibeiasismalliasipossible. iIn iconventional iactive iRC ifilters, ioperational iamplifiers i(Op-amps) iare iused ias iintegrators, ithus, ipowericonsumptioniofitheifiltersiareidirectlyirelateditoithatiofiOp-amps. i In ihigh iperformance ianalog iintegrated icircuits, isuch ias iswitch-capacitor ifilters, idelta-sigma imodulators iand ipipeline iA/D iconverters, iop iamps iwith ivery ihigh idc igain iand ihigh iunity-gain ifrequency iare ineeded ito imeetiboth iaccuracy iand ifastisettling irequirementsiofithe isystems. iIn iorderito iachieve ihigh-gain, ithe ifolded iCascode iamplifier iis ioften iadopted ias ithe ifirst-stage iof itwo-stage iamplifiers. Thisiproject ireport ipresentsia ihighly iadaptive ioperational iamplifier iwith ihigh igain, ihigh ibandwidth, ihigh ispeed iand ilow ipower iconsumption. iBy iadopting ithe irecycling ifolded iCascode itopology ialong iwith ian iadaptive ibiasing icircuit, ithis idesign iachieves ihigh iperformance iin iterms iof igain-bandwidth iproducti(GBW)iandislewiratei(SR) All the simulation in this project and result verification is done on ORCAD 16.6 software using 180nm technology.