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:
Jun. 12, 2007
Filed:
Feb. 26, 2003
Noriyuki Kurakami, Maebashi, JP;
Patrick Wurm, Comberton, FR;
Robert Astle Henshaw, Sudbury, GB;
David Freeborough, Balsham, GB;
Noriyuki Kurakami, Maebashi, JP;
Patrick Wurm, Comberton, FR;
Robert Astle Henshaw, Sudbury, GB;
David Freeborough, Balsham, GB;
Hitachi, Ltd., Tokyo, JP;
TTPCom Limited, Melbourn, GB;
Abstract
In a polar loop based radio-communications apparatus having a phase control loop for controlling the phase of a carrier outputted from an oscillator for transmission, and an amplitude control loop for controlling the amplitude of a transmission output signal outputted from a power amplification circuit, the phase control loop is first started while maintaining the amplitude control loop in an off state at the outset of transmission, and the amplitude control loop is started after stabilizing the phase control loop.