OUTPUT CASCADE OF POWER AMPLIFIER Russian patent published in 2007 - IPC H03F3/30 H03F3/26 

FIELD: radio engineering and communications, possible use as output buffer device for amplifying quickly changing analog signals power-wise, in structure of output cascades of analog microchips of various functional purposes, for example, in operational amplifiers.

SUBSTANCE: output cascade of power amplifier contains output transistors (1,2) of different conductivity type with combined collectors, which are connected to load (3), supply of supporting current (4), current repeater (5), output of which (6) is combined with base of output transistor (1) and auxiliary load (7), coupled in parallel to emitter-base transition of output transistor (1), where input (8) of current repeater (5) is connected to collector of first input transistor (9), and base of input transistor (9) is connected to base of output transistor (2). Introduced into circuit are first (10) and second (11) additional transistors of different types of conductivity, emitters of which are connected to each other and connected to supply of supporting current (4), where base of transistor (10) is connected to source of shifting voltage (12), and base of transistor (11) is connected to base (13) of transistor (9).

EFFECT: increased symmetry of positive and negative values of output current.

3 cl, 7 dwg