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:
Dec. 25, 2012
Filed:
Sep. 04, 2009
Paul Cheng-po Liang, Santa Clara, CA (US);
Koji Takinami, Osaka, JP;
Hua Wang, San Mateo, CA (US);
Toru Matsuura, Osaka, JP;
Paul Cheng-Po Liang, Santa Clara, CA (US);
Koji Takinami, Osaka, JP;
Hua Wang, San Mateo, CA (US);
Toru Matsuura, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The disclosure relates to a method and apparatus for providing efficient signal transmission. Conventional linear amplifiers are most efficient when operated in compressed mode. In the compressed mode, the digital power amplifier switches between the on and off modes. A digital power amplifier operates in compressed mode only if the incoming signal is an on-off constant envelop signal. In one embodiment, the disclosure provides a method and apparatus for converting a digital baseband signal to on-off constant envelop signals for processing through binary-weighted or thermometer-weighted amplifier which are operated in compressed mode.