CONCURRENT DUAL-BAND SIGNAL AMPLIFIER

摘要

A signal amplifier according to an embodiment of the present invention may include: a band suppression filter unit that suppresses a preset band of bands included in an input signal; a first common source type amplifying unit which is connected between a driving voltage and a ground terminal and provides a first amplification signal to a common output node by amplifying a first input signal of an output signal of the band suppression filter unit, which is separated from a common input node; a second common source type amplifying unit which is stacked on the first common source type amplifying unit between the driving voltage and the ground terminal, and provides a second amplification signal to the common output node by amplifying a second input signal of an output signal of the band suppression filter unit, which is separated from the common input node; and an output matching unit that matches impedance of the common output node and the output terminal, and delivers a combination signal in which the first amplification signal and the second amplification signal are combined from the common output node to the output terminal.