LAP Lambert Academic Publishing Arkhitektura i skhemotekhnika operatsionnykh usiliteley: Metody snizheniya napryazheniya smeshcheniya nulya v usloviyakh temperaturnykh i radiatsionnykh vozdeystviy

Naibolee populyarnye mikroskhemy operatsionnykh usiliteley (OU), vypolnennye po klassicheskim arkhitekturam s tokovymi zerkalami, imeyut sravnitel'no bol'shie urovni napryazheniya smeshcheniya nulya (Usm = 2÷10 mV). Minimizatsiya etogo parametra bez spetsial'noy podgonki balansirovochnykh rezistorov OU predstavlyaet soboy dostatochno aktual'nuyu skhemotekhnicheskuyu zadachu. V rabote rassmatrivayutsya metody umen'sheniya odnoy iz naibolee sushchestvennykh sostavlyayushchikh Usm, kotoraya svyazana c temperaturnym dreyfom i radiatsionnoy degradatsiey β bipolyarnykh tranzistorov. Predlagaetsya kazhdyy iz funktsional'nykh uzlov OU kharakterizovat' koeffitsientami slaboy tokovoy asimmetrii, vliyayushchimi na Usm. Pri etom malye urovni Usm obespechivayutsya tol'ko pri strogo opredelennykh znacheniyakh etikh koeffitsientov, zavisyashchikh ot svoystv ispol'zuemykh kaskadov. Protsedura sinteza pretsizionnykh analogovykh skhem illyustriruyutsya bolee chem 50 primerami postroeniya i komp'yuternogo modelirovaniya temperaturnoy i radiatsionnoy zavisimosti napryazheniya smeshcheniya nulya OU razlichnykh modifikatsiy. Rabota prednaznachena dlya spetsialistov, zanimayushchikhsya proektirovaniem analogovykh mikroskhem, a takzhe dlya prepodavateley i studentov tekhnicheskikh VUZov.