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:
Sep. 07, 2010
Filed:
Apr. 26, 2006
Toru Matsuura, Osaka, JP;
Shigeru Morimoto, Osaka, JP;
Toru Matsuura, Osaka, JP;
Shigeru Morimoto, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Provided is a transmitter circuit capable of operating with low distortion and high efficiency even in a modulation method using wide modulation bandwidth. In the transmitter circuit, a signal generation section () generates an amplitude signal and an angle-modulated signal. Based on a predetermined characteristic, a compensating filter () wave-shaping-processes the amplitude signal. A regulator () outputs a signal in accordance with a magnitude of the signal which has been wave-shaping-processed by the compensating filter (). An amplitude modulator section () amplitude-modulates the angle-modulated signal by using the signal outputted from the regulator (). A characteristic of the compensating filter () is an inverse of a transfer characteristic between an input at the regulator () and an output at the amplitude modulator section ().