LOW-NOISE AMPLIFIER Russian patent published in 2024 - IPC H03F3/45 H03F1/22 

FIELD: radio communication equipment.

SUBSTANCE: invention relates to radio communication equipment of wide application, including mobile communication, Internet of things and medicine, more specifically to input units of integrated circuits of radio receivers intended for amplification and conversion of a single-phase input radio signal into a paraphase one. Low-noise splitter amplifier consists of two cascode amplifiers connected in series. According to one of the versions, the input signal to the second amplifier is supplied from the source of the input transistor of the first stage through a coupling capacitor, and gates of cascode transistors are connected together and connected to a source of bias voltage through a resistor of sufficiently large value so as not to shunt the amplified signal. In the low-noise splitter amplifier according to another version, the second stage is directly connected to the drain of the input transistor of the first stage by using a current mirror providing identical mode of both stages. In the third version of the low-noise splitter amplifier, complementary amplification stages are used.

EFFECT: high sensitivity of the splitter amplifier of the input signal, improved linearity and improved differentiation at high frequencies.

1 cl, 6 dwg