BROADBAND DIFFERENTIAL AMPLIFIER Russian patent published in 2013 - IPC H03F3/34 

FIELD: radio engineering, communication.

SUBSTANCE: broadband differential amplifier comprises the first (1) input cascade, the first (5) output transistor, the second (8) output transistor, the first (10) current-stabilising dipole, connected between the collector of the first (5) output transistor and the first (4) bus of the power supply source, the second (11) current-stabilising dipole, connected between the collector of the second (8) output transistor and the first (4) bus of the power supply source. The collector of the first (5) output transistor is connected with the first (12) output of the device via the first (13) buffer amplifier, the collector of the second (8) output transistor is connected with the second (14) output of the device via the second (15) buffer amplifier, between the first (12) and second (14) outputs of the device there are serially connected first (16) and second (17) additional resistors, the common unit of which is connected with bases of the first (5) and second (8) output transistors via the non-inverting cascade (18), the first (12) output of the device is connected with the emitter of the first (5) output transistor via the first (19) correcting capacitor, and the second (14) output of the device is connected with the emitter of the second (8) output transistor via the second (20) correcting capacitor.

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

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