DIFFERENTIAL OPERATING AMPLIFIER Russian patent published in 2011 - IPC H03F3/45 

FIELD: radio engineering.

SUBSTANCE: differential operating amplifier includes input differential cascade (1) with the first (2) and the second (3) current outputs; current mirror (4), buffer amplifier (5) the base of input transistor (T) (6) of which is connected to the first (7) current-stabilising bipole (CB). To the scheme there introduced is additional T (8) the base of which is connected to the output of current mirror (4) and the first (2) current output of input differential cascade (1); collector is connected to the input of current mirror (4), and emitter is connected to the base of input T (6) of buffer amplifier (5); at that, emitter of input T (6) of buffer amplifier (5) is connected to the output of the device and the second (9) additional CB.

EFFECT: decreasing absolute U_offset value and its temperature drift.

2 cl, 5 dwg