Operatsion kuchaytirgich (OK) deb, analog signal lar ustidan turli amallarni bajarishga mo‘ljallangan, differensial kuchaytirish prinsipiga asoslangan, kuchlanish bo‘yicha katta kuchaytirish koeffitsientiga ega bo‘lgan (KU=104÷106) integral o‘zgarma stok kuchaytirgichiga aytiladi.