The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2002
Filed:
Mar. 25, 1998
Kazuhiro Kimura, Fukaya, JP;
Shigeaki Hayashibe, Gunma-ken, JP;
Takahiko Masumoto, Gunma-ken, JP;
Yutaka Hirakoso, Gyoda, JP;
Hiroshi Kaneko, Gunma-ken, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A receiver receives FM multiplex broadcast data of both RDS and DARC systems by using one front end. A BIC detection circuit ( ) detects a block identification code (BIC) included in received data. A coincidence/non-coincidence detection circuit ( ) judges whether or not a BIC detection timing is correct and emits a coincidence/non-coincidence pulse. A forward protection circuit ( ) counts a frequency of outputs of non-coincidence pulses and retains an established synchronous condition until the counted value exceeds a predetermined value. Then, a forward protection control circuit ( ) inhibits the forward protection circuit from performing a count operation while a search is performed for selecting a station. Also, a rearward protection circuit ( ) counts a frequency of outputs of coincidence pulses and establishes a synchronous condition when the counted value reaches a predetermined value. Further, a rearward protection control circuit ( ) inhibits the rearward protection circuit from performing a count operation while a search is performed.