Transistoramplifiershavebeenwrittenaboutforwelloverahalfcentury.Whyanotherbookonanoldsubject?Ihavethreereasons.Asafielddevelops,simplificationsandrefinementsoccurandmisconceptionsarecorrected.Thisisstilltrueforanalogcircuits.Someimportantconceptshaveyettodiffusebroadly,leavingengine