×

Radio broadcast reciever, automatic tuning device for radio broadcast and method for receiving radio broadcast

  • US 20080045167A1
  • Filed: 06/14/2007
  • Published: 02/21/2008
  • Est. Priority Date: 07/07/2006
  • Status: Active Grant
First Claim
Patent Images

1. A radio broadcast receiver comprising:

  • a frequency conversion circuit for receiving a radio broadcast wave and for outputting a reception signal having an intermediate frequency;

    a detection circuit for detecting the reception signal of an analog radio broadcast wave and for outputting a modulation signal as a detection signal in an audio range;

    an automatic tuning device for searching a broadcast frequency corresponding to a reception signal level of the reception signal by changing a reception signal frequency of the reception signal, the reception signal level being equal to or larger than a predetermined electric field intensity threshold value; and

    a noise amplifier for amplifying a noise component in the detection signal and for outputting a noise detection signal corresponding to a noise amount, whereinthe automatic tuning device controls the frequency conversion circuit to output the reception signal, which is converted to have the intermediate frequency from the broadcast frequency, andthe automatic tuning device selects the broadcast frequency when the reception signal level is equal to or larger than the predetermined electric field intensity threshold value and a noise detection signal level of the noise detection signal is equal to or smaller than a predetermined noise determination threshold value.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×