Patent ID: 8855590

Claim:
A radio frequency signal receiving device, comprising: a low-noise amplifier (LNA), having a single input end, a first differential output end, and a second differential output end, wherein the single input end receives a radio frequency input signal, and the LNA comprising: a first inductor, serially connected between the first differential output end and an operating voltage receiving end; a second inductor, serially connected between the second differential output end and the operating voltage receiving end; an inverting amplifier circuit, wherein an input end of the inverting amplifier circuit is coupled to the single input end; and a single-end to dual-end amplifier circuit, coupled to an output end of the inverting amplifier circuit, and coupled to the first differential output end and the second differential output end; and a mixer, coupled to the first differential output end and the second differential output end of the LNA, and having a first differential pair and a second differential pair, wherein common ends of the first differential pair and the second differential pair are respectively coupled to the first differential output end and the second differential output end, and the first differential pair and the second differential pair commonly receive a differential signal group.