Low-noise amplifier stage with matching network

摘要

An amplifier stage having a first and a second transistor connected in series to each other between a first and a second reference potential line. The first transistor has a control terminal connected to an input of the amplifier stage through a first inductor, a first terminal connected to the second reference potential line through a second inductor, and a third terminal connected to a first terminal of the second transistor. The second transistor has a second terminal forming an output of the amplifier stage, and connected to the first reference potential line through a load resistor. To improve the noise figure, a matching capacitor is connected between the control terminal and the first terminal of the first transistor.