Title：Frequency divider, frequency synthesizer and application circuit
Country：USA
Patent No.：US8446190 B2
Legal Status：Authorized
Inventor：Woogeun Rhee, Xueyi Yu, Yuanfeng Sun, Sang-Soo Ko, Byeong-Ha Park, Hyung-Ki Ahn, Woo-Seung Choo, Zhihua Wang
Assignee：Samsung Electronics Co., Ltd.; Tsinghua University
Address：
Filing Date：2009-06-09
Issue Date：2013-05-21
Abstract：
A frequency divider includes a prescaler and multiple modulus dividers commonly coupled to the prescaler. The prescaler generates intermediate frequency signals having a same phase difference with respect to one another in response to an oscillation frequency signal. The prescaler operates at a first frequency. The modulus dividers respectively divide the intermediate frequency signals with respective ratio to provide a plurality of division frequency signals in response to a control signal. The modulus dividers operate at a second frequency less than the first frequency.
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