Patent Number: 7,787,842

Title: Radio broadcast receiver, automatic tuning device for radio broadcast and method for receiving radio broadcast

Abstract: A radio broadcast receiver includes: a frequency conversion circuit for receiving a radio broadcast wave and for outputting a reception signal; a detection circuit for detecting the reception signal of an analog radio broadcast wave and for outputting a detection signal; an automatic tuning device for searching a broadcast frequency; and a noise amplifier for amplifying a noise component in the detection signal and for outputting a noise detection signal. The automatic tuning device selects the broadcast frequency when the reception signal level is equal to or larger than a predetermined electric field intensity threshold value and a noise detection signal level is equal to or smaller than a predetermined noise determination threshold value.

Inventors: Yoshida; Makoto (Obu, JP)

Assignee: DENSO CORPORATION

International Classification: H04B 1/18 (20060101)

Expiration Date: 8/31/12018