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 (DC) (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 (CM) (6), input of which is connected to collector of T (4), and output is connected to collector of T (5) and inlet (7) of buffer amplifier (BA) (8), conductivity of input T (9) in which matches conductivity of T (4) and T (5). Layout includes circuit of potentials matching (10), inlet (11) of which is connected to bases of T (4) and T 95), and output (12) is connected to input of additional CM (13), moreover, CM output (13) is connected to input (7) of BA (8).

EFFECT: reduced absolute value of shift voltage and its temperature drift.

4 cl, 5 dwg