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:
Aug. 01, 2006
Filed:
Feb. 26, 2003
Ryoichi Takano, Takasaki, JP;
Kazuhiko Hikasa, Hamura, JP;
Yasuyuki Kimura, Maebashi, JP;
Hiroshi Hagisawa, Tamamura, JP;
Patrick Wurm, Comberton, GB;
Robert Astle Henshaw, Sudbury, GB;
David Freeborough, Balsham, GB;
Ryoichi Takano, Takasaki, JP;
Kazuhiko Hikasa, Hamura, JP;
Yasuyuki Kimura, Maebashi, JP;
Hiroshi Hagisawa, Tamamura, JP;
Patrick Wurm, Comberton, GB;
Robert Astle Henshaw, Sudbury, GB;
David Freeborough, Balsham, GB;
Renesas Technology Corp., Tokyo, JP;
TTPCOM Limited, Hertfordshire, GB;
Abstract
A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted from a power amplification circuit, and designed to be capable of performing transmission using a GMSK modulation mode and transmission using an 8-PSK modulation mode. In the transmitter, the phase control loop is shared as a phase control loop for use in the GMSK modulation mode and a phase control loop for use in the 8-PSK modulation mode. A component similar to any one of components constituting a loop filter is provided in parallel therewith so that the component can be connected or disconnected in accordance with the modulation mode, for example, by use of a switching element.