Na'urar firikwensin matsa lamba, azaman na'urar da ba makawa a masana'antu da fasaha na zamani, na iya canza siginar da aka tsinkayi na matsa lamba zuwa siginar lantarki wanda za'a iya sarrafa shi. Wannan tsarin jujjuyawar yana dogara ne akan nakasar nau'in matsi mai matsewa, kuma idan aka yi amfani da matsa lamba na waje zuwa ga ma'auni mai mahimmanci, siffar ko tsarin sinadaran yana canza, wanda hakan yana canza sigoginsa na lantarki kamar juriya, iyawa ko inductance. Na'urar sarrafa siginar tana kama waɗannan canje-canjen a cikin firikwensin kuma an canza su zuwa fitarwar lantarki daidai. Ana amfani da na'urori masu auna matsa lamba ba kawai a fannonin masana'antu na gargajiya kamar kiyaye ruwa da wutar lantarki, sufurin jiragen kasa ba, har ma suna taka muhimmiyar rawa a fagagen fasahar zamani kamar gine-gine masu hankali, sararin samaniya, da masana'antar soji.