BUFFER AMPLIFIER Russian patent published in 2010 - IPC H03F3/50 H03F3/26 

FIELD: radio engineering.

SUBSTANCE: invention can be used as output device to amplify discontinuous analog signal power (buffer amplifier) in input stages of various-purpose analog microcircuits, for example operating amplifiers. Buffer amplifier comprises first (1) and second (2) input transistors with their bases connected to BA input (3). Transistor emitter is connected to the base of first output transistor (4) and collector of the first input transistor (5) of the first controlled power supply. Emitter of transistor (2) is connected to the base of second output transistor (6) and collector of second transistor (7) of the second controlled current source. Note here that emitters of transistors (4) and (6) are connected with DA output (8). DA circuit comprises additionally first (9) and second (10) transistors. Base of transistor (9) is connected to emitter of transistor (2), base of transistor (10) is connected to emitter of transistor (1), collector of transistor (9) is connected with base of transistor T (5) of the first controlled current source. Emitter of transistor (9) is connected with collector of transistor (1) and first (11) additional current-stabilising bipolar transistor (10) is connected to base of transistor (7) of the second controlled current source. Emitter (10) is connected with collector of transistor (2) and second additional current-stabilising bipolar transistor (12).

EFFECT: expanded range of linear operation.

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