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:
Jun. 13, 2000
Filed:
Jul. 16, 1997
Applicant:
Inventors:
Toru Mizumoto, Hino, JP;
Kenji Fukunabe, Sagamihara, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370347 ; 370442 ;
Abstract
A free channel detecting method and device which can detect without fail a free channel regardless of the presence of an interfering wave which partly overlaps with the head and end of a slot configuring a time division channel. Output of an envelope detection circuit for detecting an envelope of a received signal is added to a peak hold circuit, and a free channel is detected according to the output of the peak hold circuit.