AMPLIFIER USING COMMON INDUCTOR

摘要

An amplifier using a common inductor is provided to reduce a size of the chip and to minimize a parasitic component such as a parasitic capacitance by using the common inductor. An amplifier using a common inductor comprises an input terminal(601), an impedance matching unit(650), an amplifying unit(652), and a negative feedback unit(654). An input signal is inputted to the input terminal. The impedance matching unit matches an input frequency of the input signal with an equal output frequency using a first inductor(606). The amplifying unit amplifies the impedance-matched signal. The negative feedback unit performs a negative feedback of a part of the output signal from the amplifying unit, and removes a high frequency component of the resultant signal using the first inductor.