LOW NOISE CANCELLER, LOW NOISE CANCELLATION AMPLIFIER AND LOW NOISE CANCELLATION AMPLIFYING METHOD USING THE SAME

摘要

PURPOSE: A low noise offsetting amplifier and a method thereof are provided to combine a distortion signal with the noise power of a main signal, thereby minimizing the noise power of a low noise amplifier. CONSTITUTION: A band pass filter(10) is located on the front end of a low noise canceller(30) and a low noise amplifier(20). The band pass filter only passes signals which have a frequency within a pass range among the input signals inputted into the low noise amplifier. The input signal includes a terminal signal and an output signal of a relay which comprises a mobile communication network with a signal inputted through an antenna. The low noise amplifier amplifies an input radio frequency(RF) signal. The low noise canceller is connected to the band pass filter and the low noise amplifier. The low noise canceller eliminates nonlinear distortion generated by a noise element in the RF signal amplified by the low noise amplifier.