BUFFER AMPLIFIER Russian patent published in 2010 - IPC H03F3/45 H03F1/34 

FIELD: radio engineering.

SUBSTANCE: invention may be used as buffer amplifier (BA) of analogue microchips of various functional purpose (for instance, repeaters of signals with high efficiency factor and increased loop amplification). BA comprises current mirror (CM) (1), input differential cascade (DC) (2) with the first (3) and second (4) current leads, the first (3) current lead of input DC (2) is connected to input of CM (1), the second (4) current lead of input DC (2) is connected to output of CM (1) and base of composite transistor (T) (5), emitter of which is connected to output of device (6) and load circuit (7). Circuit comprises the first (8) and second (9) additional amplification cascades for T, connected in circuit with common base, the first (3) current lead of input DC (2) is connected to input T3 (1) via the first (8) additional cascade of amplification, the second (4) current lead of input DC (2) is connected to output CM (1) via the second (9) additional amplification cascade, besides common outputs (10) and (11) of the first (8) and second (9) additional cascades of amplification are connected to each other and connected to emitter of output composite T (5).

EFFECT: increased loop amplification.

3 cl, 9 dwg