DIFFERENTIAL OPERATIONAL AMPLIFIER FOR OPERATING AT LOW TEMPERATURES Russian patent published in 2017 - IPC H03F3/45 

FIELD: electricity.

SUBSTANCE: differential operational amplifier for operation at low temperatures is proposed, which comprises the first (1) input field effect transistor, the first (2) device input, the first (3) auxiliary transistor, the first (4) current-stabilizing dipole, the first (5) power supply bus, the second (6) input field effect transistor, a second (7) input device, the second (8) sub-transistor, and the second (9) current-stabilizing dipole, the first (10) device output, the second (11) power supply bus, the first (12) resistor of the negative feedback communication, the first (13) output transistor, the second (14) output transistor, the first (15) potentials bias circuit, the first (16) additional transistor, the second (17) additional transistor, the second (18) potentials bias circuit, the first (19) and the second (20) inputs of the output differential cascade (21).

EFFECT: increasing the input common-mode signal attenuation coefficient.

4 cl, 9 dwg