Feed-forward noise cancellation resistance negative feedback broadband low noise amplifier
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The invention belongs to the technical field of integrated circuit design, and in particular relates to a broadband low noise amplifier improved by using a feed-forward noise cancellation technique. In a circuit structure, a parallel negative feedback technique and the noise cancellation technique are combined, and a signal and noise voltage amplifying channel is added based on a conventional resistance negative feedback low noise amplifier to counteract node noise voltage in the circuit, increase the signal voltage, reduce output noise current, reduce final output noise circuit and reduce the noise coefficient of the lower noise amplifier so as to enhance the sensitivity performance of a receiver. The low noise amplifier realizes a resistance negative feedback broadband low noise amplifier circuit structure.