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. 18, 2008
Filed:
Mar. 24, 2005
Yun-seo Park, Atlanta, GA (US);
Sang-hyun Woo, Seoul, KR;
Hwan-seok Song, Suwon-si, KR;
Seong-soo Lee, Suwon-si, KR;
Chang-ho Lee, Marietta, GA (US);
Joy Laskar, Atlanta, GA (US);
Yun-Seo Park, Atlanta, GA (US);
Sang-Hyun Woo, Seoul, KR;
Hwan-Seok Song, Suwon-si, KR;
Seong-Soo Lee, Suwon-si, KR;
Chang-Ho Lee, Marietta, GA (US);
Joy Laskar, Atlanta, GA (US);
Samsung Electronics Co., Ltd., , KR;
Georgia Tech Research Corporation, Atlanta, GA (US);
Abstract
An apparatus for generating an in-phase/quadrature-phase (I/Q) signal in a wireless transceiver is disclosed, including a local oscillator for generating an oscillation signal, and first and second mixers for mixing an oscillation signal with a transmission/reception signal to convert the transmission/reception signal into a baseband or high-frequency signal. The apparatus includes a phase locked circuit for controlling the local oscillator, and a polyphase filter installed between the local oscillator and the mixers, for separating the oscillation signal from the local oscillator into an I signal and a Q signal depending on a control signal from the phase locked circuit, and outputting the separated I and Q signals to the first and second mixers, respectively.