DetailedProductDescriptionAtransistorisausedtoandswitchsignals.Itismadeofasolidpieceofmaterial,withatleastthreeterminalsforconnectAtransistorisausedtoandswitchsignals.Itismadeofasolidpieceofmaterial,withatleastthreeterminalsforconnectiontoanexternalcircuit.Avoltageorcurrentappliedtoonepairofthetransistor'sterminalschangesthecurrentflowingthroughanotherpairofterminals.Becausethecontrolled(output)canbemuchmorethanthecontrolling(input)power,thetransistorprovidesofasignal.Sometransistorsarepackagedindividuallybutmanymorearefoundembeddedin.Thetransistoristhefundamentalbuildingblockofmodernelectronicdevices,anditspresenceisubiquitousinmodernelectronicsystems.)