CASCODE DIFFERENCE AMPLIFIER WITH LOW OFFSET VOLTAGE Russian patent published in 2009 - IPC H03F3/34 H03F3/45 

FIELD: physics; radio.

SUBSTANCE: invention concerns radio engineering and communication area and can be used as the arrangement of analogue signals amplification, in structure of analogue microcircuits of a various functional purpose (for example, operating amplifiers with low zero offset electromotive force values. The cascode difference amplifier (CDA) with low offset voltage contains the first (1) and the second (2) output transistors (T) of one type of conductance, their incorporated bases are connected to the bias potential source (3), and emitters are linked with corresponding current inputs (4, 5), and also the first (6) and the second (7) current-stabilizing two-terminal elements, the third (8) and the fourth (9) output T of other type of conductance, which emitters are linked, and bases are connected with each other, and the collector the fourth output T (9) is linked to a collector the second output T (2) and a CDA output (10), and the collector the first output T (1) is linked to a collector of the third output T (8). A termination current repeater is entered into the scheme (R), its input (12) is linked to incorporated collectors of the first (1) and the third (8) output T, the general output (13) - is connected to incorporated bases of the third (8) and the fourth (9) output T, and the output (14) - is connected with the emitter of the second (2) output T.

EFFECT: reduction of bias voltage of null.

4 cl, 14 dwg