CASCODE BROADBAND AMPLIFIER Russian patent published in 2011 - IPC H03F1/22 H03F3/42 

FIELD: electricity.

SUBSTANCE: invention can be used as amplification device of analogue signals, in structure of analogue microcircuits of various functional purpose (e.g. SiGe-operational amplifiers (OA), microwave amplifiers, comparator units, continuous voltage stabilisers, etc.). Cascode broadband amplifier includes input voltage-to-current converter (1) the current output of which is connected to emitter of output transistor (2); the main non-inverting current repeater (3) with low-ohmic current input (4) and potential input (5) determining static potential of low-ohmic current input (4). At that, current output (6) of the main non-inverting current repeater (3) is connected to emitter of output transistor (2), potential bias circuit (7) connected to potential input (5) of the main non-inverting current repeater (3), bipole of collector load (8), the first output of which is connected to collector of output transistor (2) and to output of the device, and power supply bus (9). The other output of bipole of collector load (8) is connected to low-ohmic current input (4) of the main non-inverting current repeater (3) and through additional resistor (10) is connected to power supply bus (9); at that, base of output transistor (2) is connected to the first (11) potential matching circuit.

EFFECT: increasing limit values of amplification coefficient as to BA (broadband amplifier) voltage at low-voltage power supply.

5 cl, 12 dwg