DIFFERENTIAL AMPLIFIER WITH COMPLEMENTARY INPUT CASCADE Russian patent published in 2013 - IPC H03F3/34 

FIELD: radio engineering, communication.

SUBSTANCE: differential amplifier with a complementary input cascade comprises the first (1) and second (2) inputs of the device, the first (3) input transistor, the collector of which is connected with the first (4) bus of the power supply source via the first (5) current-stabilising dipole and is connected with the base of the first (6) output transistor, the second (7) input transistor, the collector of which is connected with the first (4) bus of the power supply source via the second (8) current-stabilising dipole and is connected with the base of the second (9) output transistor, the third (10) input transistor, the emitter of which is connected with the emitter of the first (3) input transistor, the fourth (11) input transistor, the emitter of which is connected with the emitter of the second (7) input transistor, the third (12) current-stabilising dipole, connected between the emitter of the second (9) output transistor, the fourth (15) current-stabilising dipole, connected between the emitter of the first (6) output transistor. Between the first (13) and second (16) outputs of the device there are serially connected the first (17) and second (18) additional resistors, besides, the common unit of the first (17) and second (18) additional resistors is connected with combined bases of the first (3) and second (7) input transistors via the additional non-inverting amplifier (19).

EFFECT: provision of high stability of a static mode of a differential amplifier and higher value of its amplification ratio by voltage.

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