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:
Nov. 20, 2007
Filed:
Jun. 17, 2004
Applicants:
Takahiro Inoue, Nara, JP;
Noboru Takeuchi, Nara, JP;
Inventors:
Takahiro Inoue, Nara, JP;
Noboru Takeuchi, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/06 (2006.01); H03D 3/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
A carrier detecting circuit which generates a carrier detection level by integral action based on a reception signal and detects using the carrier detection level whether a carrier exists is disclosed and includes an integration capacitor that is charged and discharged using a difference current between a current charged from a charging circuit and a current discharged to a discharging circuit, where the charging circuit and the discharging circuit are provided in an integrator which performs the integral action.