Patent ID: 8041322
Filing Date: 2011-10-18
Classification: H03G

Abstract:
1. A radio-frequency (RF) receiver comprising: an RF amplification circuit which amplifies a received RF signal and generates an amplified RE signal; a mixing circuit which converts the amplified RF signal into an intermediate-frequency (IF) signal; an IF amplification circuit which amplifies the IF signal and generates an amplified IF signal; a first level detection circuit which detects a signal level of the amplified RF signal; a second level detection circuit which detects a signal level of the IF signal; a third level detection circuit which detects a signal level of the amplified IF signal; a RF reference level generation circuit which generates an RF reference level based on at least one of respective detection signal levels of the first and second level detection circuits; and an RF gain control circuits which controls an amplification gain of the RF amplification circuit so that a value corresponding to a detection signal level of the third level detection circuit becomes equal to the RF reference level.