BROADBAND AMPLIFIER Russian patent published in 2011 - IPC H03F1/42 H03F1/22 H03F3/189 

FIELD: electricity.

SUBSTANCE: broadband amplifier includes input transistor cascade (1) the main input (2) of which is connected to signal source (3); common output (4) is connected to the first (5) bus of power sources, and collector output (6) is connected to output (7) of device and the first output of bipole of collector load (8), the second output of which is connected to the second (9) bus of power sources. To the diagram there introduced is the first (10) additional transistor the collector of which is connected to collector output (6) of input transistor cascade; base is connected to output of the first (11) potential bias circuit; emitter is connected through the first (12) current-stabilising bipole to the second (13) potential bias circuit; the second output of bipole of collector load (8) is connected to the second (9) bus of power source through the second (14) current-stabilising bipole and through the first (15) auxiliary bipole to low dynamic resistance to emitter of the first (10) additional transistor.

EFFECT: increasing amplification coefficient as to voltage of BA (broadband amplifier), excluding additional amplification cascades, reducing common power consumption in comparison to multi-cascade amplifiers.

7 cl, 12 dwg