LOW-TEMPERATURE CURRENT AMPLIFIER FOR DESIGNING ACTIVE RC-FILTERS Russian patent published in 2020 - IPC H03F3/00 

FIELD: radio equipment.

SUBSTANCE: disclosed is a low-temperature current amplifier for designing active RC filters, in which all field-effect transistors used are field-effect transistors with a p-n control junction, combined sources of first (4) and second (5) field-effect transistors are connected to source of first (10) additional field-effect transistor with control p-n junction, which drain is connected to non-inverting current output of device (11), and the gate is connected to output (12) of the additional potential matching circuit (13), wherein input (14) of the additional potential matching circuit (13) is connected to the bias voltage source (15).

EFFECT: creation of both inverting and non-inverting broadband current amplifier on complementary field-effect transistors with control p-n junction for operation at low temperatures, providing for different outputs of inverting and non-inverting input current signal conversion with current transmission ratio greater than one (Ki=1–5).

4 cl, 12 dwg