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:
Mar. 28, 2006
Filed:
Feb. 26, 2003
Jiro Shinbo, Takasaki, JP;
Hirotaka Oosawa, Isesaki, JP;
Noriyuki Kurakami, Maebashi, JP;
Masumi Kasahara, Takasaki, JP;
Robert Astle Henshaw, Sudbury, GB;
Jiro Shinbo, Takasaki, JP;
Hirotaka Oosawa, Isesaki, JP;
Noriyuki Kurakami, Maebashi, JP;
Masumi Kasahara, Takasaki, JP;
Robert Astle Henshaw, Sudbury, GB;
Renesas Technology Corp., Tokyo, JP;
Abstract
A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit forming part of a reception PLL circuit and an oscillator circuit for an intermediate frequency. The oscillator circuit for the transmission PLL circuit is configured to be operable in a plurality of bands. The communication semiconductor integrated circuit also comprises a circuit for measuring the oscillating frequency of the oscillator circuit for the transmission PLL circuit, and a storage circuit for storing the result of measurement made by the measuring circuit. A band to be used by the oscillator circuit for the transmission PLL circuit is determined based on values for setting the oscillating frequencies of the oscillator circuit forming part of the reception PLL circuit and the intermediate frequency oscillator circuit, and the result of measurement stored in the storage circuit.