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. 19, 2006
Filed:
Feb. 26, 2003
Kazuhisa Okada, Kiryu, JP;
Kazuhiko Hikasa, Hamura, JP;
Patrick Wurm, Cambridge, GB;
David Freeborough, Cambridge, GB;
Kazuhisa Okada, Kiryu, JP;
Kazuhiko Hikasa, Hamura, JP;
Patrick Wurm, Cambridge, GB;
David Freeborough, Cambridge, GB;
Hitachi, Ltd., Tokyo, JP;
TTP Com Limited, Hertfordshire, GB;
Abstract
A mobile communication system has a mobile phone in which a voltage is set corresponding to the characteristic variation of a PA even when a PA having characteristic variation is used. The mobile phone employs a polar loop method, which comprises an antenna () for transmission and reception of signal waves; an antenna switch () for switching the transmission mode and the reception mode; a BBLSI () having a function to control the transmission and reception; an RFIC () having a function for modulating and demodulating the transmitted and received signals; and a PA () for amplifying up to the target output power by means of the amplitude modulation at the time of the transmission.