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:
Feb. 18, 1997
Filed:
Mar. 08, 1995
Hideki Oto, Saitama-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A digital data receiver having a converter for frequency conversion of the input high frequency digital orthogonal modulation signal in a fixed intermediate frequency band, a demodulator for orthogonally demodulating an intermediate frequency signal output from the conversion signal based on a fixed frequency, and a controller for matching a frequency of the oscillation signal to a central frequency of the intermediate frequency band based on a frequency control signal generated to perform an orthogonal detection process by the demodulator. The central frequency of the oscillation signal is offset to correspond to a carrier frequency of the digital data orthogonal modulation signal in the state that a plurality of digital orthogonal modulation signal is frequency division multiplexed in the intermediate frequency band.