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. 26, 2008
Filed:
Mar. 09, 2005
Taichi Ikedo, Yokohama, JP;
Mamoru Arayashiki, Yokohama, JP;
Taichi Ikedo, Yokohama, JP;
Mamoru Arayashiki, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Linear transmission modulation apparatushas high frequency amplifierthat amplifies the high frequency phase modulation signal of a high frequency signal and power source voltage controllerthat amplifies the baseband amplitude modulation signal of the high frequency signal. Power source voltage controllerhas delta sigma amplifierthat performs delta sigma amplifying of the baseband amplitude modulation signal and generates a delta sigma amplification signal and delta amplifierthat performs delta amplifying of the baseband amplitude modulation signal and generates a delta amplification signal. In response to a modulation mode switching control signal that indicates as to whether or not the amplitude modulation signal fluctuates, one of delta sigma amplifierand delta amplifieroperates and sends out an output.