CASCODE DIFFERENTIAL AMPLIFIER Russian patent published in 2009 - IPC H03F3/45 

FIELD: physics, radio.

SUBSTANCE: invention concerns radio engineering and communication and can be used as the device of analogue signal amplification, in structure of analogue microcircuits of a various functional purpose (for example, operational amplifiers (OA)). The cascode differential amplifier (CDA) contains first (1) and second (2) input transistors (T), having their incorporated bases connected to bias voltage source 3, first 4 and second 5 current stabilising two-terminal networks (CT), joined to corresponding emitters T (1) and (2) and CDA current inlets (6, 7), first (8) and second (9) two-terminal networks of the collector load joined to collectors corresponding first (1) and second (2) T and bases of first (10) and the second (11) output T, the target current amplifier (12) which inlet is connected to collector of first T (10), and the output - is related to the collector of second T (11) and CDA output (13). The scheme has first (14) and second (15) additional T which bases are joined to collectors corresponding first (1) and second (2) T, and also non-linear current divider (NCD) (16), and first (17) NCD inlet (16) is joined to the collector of first T (14), second (18) NCD inlet (16) is joined to the collector of second T (15), first output (19) of NCD (16) is connected to the emitter of first T (1), second output (20) of NCD (16) is connected to the emitter of second T (2).

EFFECT: increase of stability of static mode at maintenance of high values of the peak output current.

5 cl, 15 dwg