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. 09, 2008
Filed:
Feb. 18, 2003
Taizo Yamawaki, Kokubunji, JP;
Hisayoshi Kajiwara, Kokubunji, JP;
Ryoichi Takano, Kodaira, JP;
Patrick Wurm, Hertfordshire, GB;
Taizo Yamawaki, Kokubunji, JP;
Hisayoshi Kajiwara, Kokubunji, JP;
Ryoichi Takano, Kodaira, JP;
Patrick Wurm, Hertfordshire, GB;
Renesas Technology Corp., Tokyo, JP;
TTPCOM Limited, Hertfordshire, GB;
Abstract
In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with lag-lead characteristics (secondary or more filter including a capacitor and a resistor) and a second filter of a perfect integrator type (filter including only a capacitor) are employed, and current-output type circuits are connected to respective front stages of the first and second filters.