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:
Aug. 10, 2010
Filed:
Jun. 30, 2008
Hsiang-chih Chen, Taipei, TW;
Don-chen Hsin, Hsinchu, TW;
Hsiang-Chih Chen, Taipei, TW;
Don-Chen Hsin, Hsinchu, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
A digital frequency synthesizer and a method thereof are provided. In the digital frequency synthesizer, a plurality of multiphase signals (MPSs) is generated by a phase delay locked loop array, and a transition reference values is generated by a programmable transition value generator. An operation result obtained according to an input signal and an accumulated value is compared with the transition reference values to generate a phase selection control signal. A phase signal is selected among the MPSs according to the phase selection control signal. After that, a sampling control is performed to the selected phase signal to generate a synthetic signal. The digital frequency synthesizer and the method thereof are flexible and are easy to produce tiny analytic phase, thus, not only fine tuning phases is added but also the resolution of the synthetic signal is improved.