DIFFERENTIAL OPERATING AMPLIFIER Russian patent published in 2010 - IPC H03F3/45 

FIELD: radio engineering.

SUBSTANCE: differential operating amplifier (DOA) includes inlet parallel-balance cascade (1) having the first (2) and the second (3) main inputs, the first (4) and the second (5) current outputs, auxiliary current mirror (6) having input (7) and output (8), the first outlet inverting cascade as to the scheme with common emitter on the first transistor (9), the emitter of which is connected to bus (10) of electric power supply through the first (11) bipole, base is connected to the second (5) current output of inlet parallel-balance cascade (1), and collector is connected to load bipole (12) and output (13) of the device. To the scheme there introduced is dynamic correction chain of amplification factor (14), which has the first (15) and the second (16) inputs, as well as the first (17) and the second (18) outputs; at that, the second output (18) is connected to the second (5) current output of inlet parallel-balance cascade (1), the first (17) output is connected to input (7) of current mirror (6), and the second (16) input is connected to the first (4) current output of inlet parallel-balance cascade (1).

EFFECT: increasing amplification factor.

4 cl, 6 dwg