DOWN-CONVERSION DEVICE AND REALIZING METHOD THEREOF AND RECEIVER

摘要

A down-conversion device applied in a receiver and a realizing method thereof are described, which relate to the field of mobile communication. The down-conversion device for down-converting a first radio frequency signal received by a receiver antenna includes a control module configured to output a control signal according to the power of the first radio frequency signal, a gain processing module configured to amplify the gain or attenuate the power of the first radio frequency signal according to the control signal to obtain a second radio frequency signal, and a down-conversion module configured to down-convert the second radio frequency signal to an intermediate frequency and output an intermediate frequency signal. In this way, it can be dynamically decided whether to amplify the gain or attenuate the gain of radio frequency signals according to the power of different radio frequency signals received, so as to avoid attenuating a radio frequency signal before amplifying it and reduce the power consumption of the receiver.