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:
Apr. 15, 2008
Filed:
Mar. 21, 2006
Tatsuto Oka, Kanagawa, JP;
Tatsuto Oka, Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Transmission apparatus capable of reducing distortion of the vector modulation wave that is the transmission output to a sufficiently small level is provided. An amplifying section () generates a vector modulation wave based on an amplitude component modulation signal and a phase modulation wave. A synchronous demodulating section () detects the vector modulation wave, generates a synchronous demodulation signal, and sends this to a band filtering section (). The band filtering section () extracts a signal of the frequency component of the distortion from a synchronous demodulation signal outputted by the synchronous demodulating section (). A controlling section () then refers to the distortion component signal extracted by the band filtering section (), controls a delay time adjusting section () in such a manner that the signal level of the distortion component becomes small, adjusts a delay time difference between the amplitude component modulation signal and the phase component modulation signal, and reduces distortion of the modulation wave.
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