BALANCED DIFFERENTIAL AMPLIFIER Russian patent published in 2008 - IPC H03F3/45 H03F3/26 

FIELD: radio engineering and communications, possible use as device for amplification of difference of two signals in structure of analog microchips of various functional purposes (for example, operational amplifiers, comparators).

SUBSTANCE: balanced differential amplifier contains first (1) and second (5) input parallel-balanced cascades on n-p-n (2) and (3), p-n-p (6) and (7) transistors, and first (4) and second (8) current-stabilizing dipoles in their common emitter circuit, where cophased inputs of first (1) and second (5) parallel-balanced cascades are connected to each other and are inputs (9) and (10) of balanced differential amplifier, output (11) is connected to first input (12) of output cascade (13), output (15) is connected to input (16) of output cascade (13). Output (11) is connected to first input (12) of output cascade (13) through first additional non-inverting current amplifier (18), second contact of second current-stabilizing dipole (8) is connected to input (12) of output cascade (13), output (15) is connected to input (16) of output cascade (13) through second additional non-inverting current amplifier (19), and second contact of first current-stabilizing dipole (4) is connected to input (16) of output cascade (13).

EFFECT: increased weakening coefficient of input cophased signals.

4 cl, 7 dwg