AMPLIFIER CIRCUIT AND OPERATING METHOD THEREOF

摘要

PURPOSE: An amplifier circuit and an operating method thereof are provided to dispose an inductive element and a capacitive element in series in a transfer path of an input signal to be amplified, thereby suppressing oscillations and removing harmonic components. CONSTITUTION: An amplifier circuit comprises an amplifying unit (110), at least one first bias circuit unit (120), at least one second bias circuit unit (130). The amplifying unit includes a plurality of transistors (Q1-Qn). The at least one first bias circuit unit is connected to the plurality of transistors, and includes a DC bias signal terminal (125) and a plurality of resistors (Rq1-Rqn). The at least one second bias circuit unit applies a signal to be amplified to the plurality of transistors, and includes capacitive elements (C1-Cn) and inductive elements (L1-Ln) connected in series.