CASCODE DIFFERENTIAL AMPLIFIER WITH LOW VOLTAGE OF ZERO SHIFT Russian patent published in 2010 - IPC H03F3/45 

FIELD: radio engineering.

SUBSTANCE: cascode differential amplifier comprises input differential cascade (1), the first (2) and second (3) current outputs of which are connected to according emitters of the first (4) and second (5) output transistors with combined bases, current mirror (6), input of which is connected to collector of the first (4) output transistor, and output is connected to collector of the second (5) output transistor and inlet (7) of buffer amplifier (8), conductivity of input transistor (9) in which matches conductivity of the first (4) and second (5) output transistors. Base of the first (4) output transistor is connected to its collector.

EFFECT: reduced absolute values of shift voltage and its thermal drift.

4 cl, 14 dwg