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

FIELD: radio engineering.

SUBSTANCE: differential operational amplifier comprises input parallel balance cascade (IPBC) (1), having the first (2) and second (3) main inputs, the first (4) and second (5) current outputs, the first (6) voltage follower (VF), input of which is connected to the first (4) current output of IPBC (1), current mirror (CM) (7), having input (8) and output (9). The circuit comprises the second (10) VF, identical to the first (6) VF, input of which is connected to the second (5) current output of IPBC (1) and circuit of dynamic correction of amplification ratio (11), having the first (12) and second (13) current inputs, and the first (14) and second (15) current outputs, besides the first current input (12) is connected to the second (5) current output of IPBC (1), the second (13) current input is connected to output (9) of CM (7), the first (14) current output is connected to input (8) of CM (7), and the second (15) current output is connected to the first (4) current output of IPBC (1).

EFFECT: expanded range of working frequencies.

3 cl, 16 dwg