DIFFERENTIAL AMPLIFIER Russian patent published in 2008 - IPC H03F3/45 

FIELD: electricity.

SUBSTANCE: invention may be used for amplification of analogue signals within wide dynamic range and in structures of different functional analogue microchips (for example, fast-acting operational amplifiers). Differential amplifier includes input stage 1 (1) with output (2) connected to integrated emitters of output transistors 1 (3) and 2 (4); output stage 2 (5) with output (6) connected to integrated emitters of output transistors 3 (7) and 4 (8); static mode setup circuit (9) of output transistors (3, 4, 7, 8) coupled with their bases, current mirror 1 (10) with input (11) linked to transistor collector (3), while output (12) is connected to transistor collector (8) and differential amplifier output (13). Current mirror 2 (15) input (16) is connected to transistor collector (7), while its output (17) is linked to transistor collector (4). Current mirror (10) input (11) has connection with current mirror (15) output 9 (17).

EFFECT: decrease in zero offset voltage.

10 dwg