Radio frequency signal receiving device

摘要

Disclosed is a radio frequency signal receiving device, which includes a low-noise amplifier (LNA) and a mixer. The LNA includes a first inductor and a second inductor. The mixer has a first differential pair and a second differential pair, 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. The first inductor and the second inductor are serially connected between the first differential output end and the second differential output end of the LNA, so as to reduce power consumption and reach suitable frequency response. The first inductor and the second inductor generate a resonance effect with parasitic capacitance on the mixer, so as to effectively reduce flicker noises, and improve a working benefit of the radio frequency signal receiving device.

主权项

1. 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; anda 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.