CASCODE DIFFERENTIAL AMPLIFIER Russian patent published in 2010 - IPC H03F3/45 H03F1/56 

FIELD: radio engineering.

SUBSTANCE: cascode differential amplifier (CDA) includes first (1) and second (2) input transistors (T) the emitters of which are connected to current-stabilising bipole (3), and collectors are connected to emitters of first (4) and second (5) output T with combined bases and to bases of first (6) and second (7) auxiliary T with combined emitters. To the scheme there introduced is additional current mirror (8) the input of which is connected to bases of output T (4) and (5), and output is connected to combined emitters of first (6) and second (7) auxiliary T; at that, collector of first (6) auxiliary T is connected to base of first (1) input T, and collector of second (7) auxiliary T is connected to base of second (2) input T.

EFFECT: increasing input resistance.

2 cl, 8 dwg