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. 24, 2012
Filed:
Jul. 19, 2010
Hsiang-hui Chang, Taipei Hsien, TW;
Ping-ying Wang, Hsinchu, TW;
Jing-hong Conan Zhan, HsinChu, TW;
Bing-yu Hsieh, Taipei, TW;
Hsiang-Hui Chang, Taipei Hsien, TW;
Ping-Ying Wang, Hsinchu, TW;
Jing-Hong Conan Zhan, HsinChu, TW;
Bing-Yu Hsieh, Taipei, TW;
Mediatek Inc., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
For decreasing errors within an analog phase-locked loop, an all-digital phase-locked loop (ADPLL) with digital components and digital operations is used. The ADPLL may also be used for direct frequency modulation (DFM). By defining a proportional path gain of an ADPLL by a bandwidth and a reference frequency of the ADPLL, by a TDC gain, a DCO gain, a dividing ratio of a frequency divider, a gain of an amplifier or a combination thereof, the gain of the amplifier may be adjusted so that an optimal loop bandwidth of the ADPLL may be well calibrated. For achieving the aim of entirely digital of the ADPLL, the gains of the TDC and the DCO may be further adjusted in a digital manner.