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. 31, 2013
Filed:
Jan. 27, 2010
Shingo Yamanouchi, Tokyo, JP;
Kazuaki Kunihiro, Tokyo, JP;
Kazumi Shiikuma, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An aspect of a power amplifier according to the present invention is a power amplifier that amplifies a modulated signal including amplitude modulated components and phase modulated components, the power amplifier including a first voltage sourcethat amplifies low-frequency components of the amplitude modulated components of the modulated signal to output a first voltage VC_L, a second voltage sourcethat amplifies high-frequency components of the amplitude modulated components of the modulated signal to output a second voltage VC_H, a current sourcethat amplifies amplitude components of the modulated signal to output a current, a combiner circuitthat combines the first voltage VC_L, the second voltage VC_H, and a current IM to generate a modulated power supply signal VOUT, and an RF amplifierthat amplifies a signal obtained by up-converting the modulated signal to a carrier frequency and outputs the amplified signal after modulating amplitude of the amplified signal by the modulated power supply signal VOUT. In this way, power efficiency of a circuit that generates a modulated power supply can be improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile