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. 14, 2009
Filed:
Sep. 20, 2007
Joonbae Park, Seoul, KR;
Kyeongho Lee, Seoul, KR;
Yido Koo, Yungin-Si, KR;
Jeong-woo Lee, Seoul, KR;
Joonbae Park, Seoul, KR;
Kyeongho Lee, Seoul, KR;
Yido Koo, Yungin-Si, KR;
Jeong-Woo Lee, Seoul, KR;
GCT Semiconductor, Inc., San Jose, CA (US);
Abstract
The application discloses system and method embodiments related to a frequency synthesizer. Embodiments of a frequency synthesizer can have a low phase noise and a narrow channel spacing. Embodiments of a frequency synthesizer can use two phase locked loops. One embodiment of a frequency synthesizer can include a reference frequency oscillator for outputting a signal having a reference frequency, an integer-N phase locked loop to generate a first output frequency signal based on the reference frequency signal, a fractional-N phase locked loop to generate a second output frequency based on the reference frequency signal and a circuit to generate an output frequency signal by combining the first output frequency and the second output frequency.