DIFFERENTIAL AMPLIFIER WITH ENLARGED VARIATION RANGE OF INPUT IN-PHASE SIGNAL Russian patent published in 2013 - IPC H03F3/34 

FIELD: radio engineering.

SUBSTANCE: differential amplifier with enlarged variation range of input in-phase signal includes input differential stage (1) with first (2) and second (3) current outputs, first (4) power supply bus, first (5) forward-biased p-n junction, second (6) forward-biased p-n junction, first (7) output transistor, second (8) output transistor, third (9) output transistor, fourth (10) output transistor, load circuit (11) coordinated with second (12) power supply bus, emitter of additional transistor (13), the emitter of which is connected to additional source of reference current (14), first (15) and second (16) in-series connected additional resistors.

EFFECT: enlarging allowable variation range of input in-phase signals, which is sufficient improvement of one of the important qualitative properties of differential amplifier.

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