DIFFERENTIAL AMPLIFIER WITH PARAPHASE OUTPUT Russian patent published in 2011 - IPC H03F3/45 

FIELD: electricity.

SUBSTANCE: differential amplifier with paraphrase output includes input parallel balance cascade (1), the first (2) and the second (3) current outputs of which are connected to the first outputs of the appropriate first (4) and second (5) collector load resistors and bases of the first (6) and the second (7) output transistors, output transistor of current stabiliser (8), the collector of which is connected to common emitter circuit (9) of input parallel balance cascade (1), and base is connected to the first output of auxiliary forward-biased p-n junction (10), the first (11) and the second (12) feedback resistors having common node (13), which are connected to emitters of the appropriate first (6) and second (7) output transistors and the first and the second antiphase outputs of differential amplifier; at that, common node (13) of the first (11) and the second (12) feedback resistors is connected to base of output transistor of current stabiliser (8); the second output of auxiliary forward-biased p-n junction (10) and emitter of output transistor of current stabiliser (8) are connected to the first (14) bus of power sources, and collectors of the first (6) and the second (7) output transistors are connected to the second (15) bus of power sources. To the diagram there introduced is the first (16) and the second (17) additional transistors; collector of the first (16) additional transistor is connected to the first (2) current output of input parallel balance cascade (1); collector of the second (17) additional transistor is connected to the second (3) current output of input parallel balance cascade (1), the second output of the first (4) resistor of collector load and through the first (18) additional bipole is connected to the second (15) bus of power source and emitter of the first (16) additional transistor; the second output of the second (5) resistor of collector load is connected through the second (19) additional bipole to the second (15) bus of power source and emitter of the second (17) additional transistor; at that, bases of the first (16) and the second (17) additional transistor are connected to potential bias circuit (20).

EFFECT: increasing amplification coefficient as to voltage at low-voltage power supply.

5 cl, 7 dwg