DIFFERENTIAL AMPLIFIER WITH LOW VOLTAGE OF ZERO SHIFT Russian patent published in 2010 - IPC H03F3/45 

FIELD: radio engineering.

SUBSTANCE: differential amplifier (DA) comprises the first (1) and second (2) input transistors (T), the first (3) and second (4) current-stabilising dipoles (CD), dipole of local negative feedback (5) connected between emitters T (1) and T (2), current mirror (6), input and output of which are accordingly to collectors T (1) and T (2) and input (7) of emitter follower (8) on the basis of input T (9), type of conductivity of which matches type of conductivity T (1) and T (2). Circuit includes T (10) and T (11) with combined bases, emitter T (10) is connected to CD (3), emitter T (11) is connected to CD (4), combined bases T (10) and T (11) are connected to emitter T (1), collector T (10) is connected to emitter T (1), and collector T (11) is connected to emitter T (2).

EFFECT: reduced absolute value of shift voltage and its temperature drift.

5 cl, 11 dwg