BROADBAND CASCADE AMPLIFIER Russian patent published in 2014 - IPC H03F3/45 H03F3/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and communication and can be used as an analogue signal amplifier in analogue microcircuit structures of various purposes (e.g. broadband and selective HF and UHF amplifiers) The broadband cascade amplifier includes an input transistor (1) whose source is connected to a first (2) power supply bus, the gate is connected to an input voltage source (3) and the drain is connected to a first (4) output transistor and the inverting input of an auxiliary voltage amplifier (5), the output of which is connected to the gate of the first (4) output transistor, and the non-inverting input is connected to a reference voltage source (6), a load circuit (7), connected between the output of the device (8) and a second power supply bus (9). The drain of the first (4) output transistor is connected to the source of an additional transistor (10), the drain of which is connected to the output of the device (8) and the gate is connected to the input of an additional non-inverting current amplifier (11), the output of which is connected to the source of the first (4) output transistor or the source of the additional transistor (10), wherein an additional current-stabilising two-terminal element (12) is connected between the second (9) power supply bus and the input of the additional non-inverting current amplifier (11).

EFFECT: high cut-off frequency f_gr of the voltage gain of the cascade amplifier, wider range of operating frequency of the cascade amplifier, low total power consumption.

10 dwg