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:
Jul. 23, 2013
Filed:
Aug. 23, 2012
Satoshi Tanaka, Kokubunji, JP;
Hiroshi Kamizuma, Kokubunji, JP;
Koji Maeda, Kokubunji, JP;
Sungwoo Cha, Takasaki, JP;
Yukinori Akamine, Kokubunji, JP;
Taizo Yamawaki, Tokyo, JP;
Satoshi Tanaka, Kokubunji, JP;
Hiroshi Kamizuma, Kokubunji, JP;
Koji Maeda, Kokubunji, JP;
Sungwoo Cha, Takasaki, JP;
Yukinori Akamine, Kokubunji, JP;
Taizo Yamawaki, Tokyo, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
The transmitter of the transceiver includes: a transmitter-side mixers of a transmitter-side modulator; a transmitter-side voltage-controlled oscillator; and a transmitter-side divider. The divider having a dividing factor of a non-integral number is supplied with an oscillating output of the oscillator. A pair of non-quadrature local signals having a phase difference of 90° plus a predetermined offset angle is produced by the divider and supplied to the mixers. The transmitter includes a phase-shift unit which converts a pair of quadrature transmit signals having a phase difference of about 90° on an analog basis into a pair of non-quadrature shifted transmit signals. Consequently, quadrature modulation is performed by the mixers. Use of a similar configuration enables the reduction in interference of an RF signal with local signals supplied to receiver-side mixers of the receiver.