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:
Apr. 19, 2011
Filed:
Dec. 27, 2009
Kwang-hyun Baek, Seoul, KR;
Hong Chang Yeoh, Seoul, KR;
Jae-hun Jung, Seoul, KR;
Yun-hwan Jung, Seoul, KR;
Joon Hyun Baek, Gyeonggi-do, KR;
Kwang-Hyun Baek, Seoul, KR;
Hong Chang Yeoh, Seoul, KR;
Jae-Hun Jung, Seoul, KR;
Yun-Hwan Jung, Seoul, KR;
Joon Hyun Baek, Gyeonggi-do, KR;
Chung-Ang University Industry—Academy Cooperation Foundation, Seoul, KR;
ZARAMTECHNOLOGY Co. Ltd., Gyeonggi-do, KR;
Abstract
The present invention relates to a direct digital frequency synthesizer using a variable sine wave-weighted digital to analog converter with improved size and efficiency and a synthesizing method thereof. The direct digital frequency synthesizer and the synthesizing method thereof are capable of simplifying a configuration for matching output data of a phase accumulator to sine wave amplitude without increase in complexity of a DAC by applying a nonlinear DAC for directly generating a current corresponding to base points with sine weights and a variable sine wave-weighted DAC for generating fine currents to be combined with variable weights based on the base points. Accordingly, it is possible to provide a high quality output, reduce a size and power consumption, and increase a speed.