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:
Nov. 08, 2011
Filed:
Jun. 22, 2005
Satoshi Tanaka, Kokubunji, JP;
Yukinori Akamine, Kokubunji, JP;
Manabu Kawabe, Hachioji, JP;
Yasuyuki Kimura, Maebashi, JP;
Takao Okazaki, Hamura, JP;
Satoshi Tanaka, Kokubunji, JP;
Yukinori Akamine, Kokubunji, JP;
Manabu Kawabe, Hachioji, JP;
Yasuyuki Kimura, Maebashi, JP;
Takao Okazaki, Hamura, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
This invention provides a wireless transmitter circuit for mobile communication apparatus and this circuit can be configured with fewer components and is suitable for downsizing. A single PLL synthesizer serves as both RF frequency band PLL and IF frequency band PLL among three oscillators for TX, RX and IF frequency bands, which have been required in conventional mobile communication apparatus. The number of necessary oscillators occupying a large area within a chip is reduced and the number of components is decreased. Specifically, circuitry is arranged to generate local oscillation signals for RF and IF frequency bands by frequency dividing the output of a VCO of the RF frequency band PLL.