Negative feedback amplifier

The invention belongs to the field of circuits, and particularly relates to a negative feedback type amplifier. The negative feedback type amplifier comprises a negative feedback circuit and an amplifying circuit, wherein the negative feedback circuit comprises an input branch and an output branch; the input branch receives an input signal and transmits the input signal to the input end of the amplifying circuit; the output branch receives and outputs the output signal of the amplifying circuit and couples the output signal to the input branch; and the amplifying circuit receives the signal ofthe input branch, amplifies the signal and outputs the amplified signal. According to the negative feedback type amplifier circuit, the negative feedback signals are obtained through coupling, the negative feedback circuit is used for replacing a parallel negative feedback resistor in a traditional parallel negative feedback type amplifier, so that power loss is reduced, and the noise coefficientlower than that of a para