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:
Jun. 21, 2011
Filed:
Mar. 04, 2010
Chang-shun Liu, Taipei, TW;
Tse-chi Lin, Taipei County, TW;
Yu-hsuan Tu, Tainan, TW;
Kang-wei Hsueh, Hsinchu, TW;
Chang-Shun Liu, Taipei, TW;
Tse-Chi Lin, Taipei County, TW;
Yu-Hsuan Tu, Tainan, TW;
Kang-Wei Hsueh, Hsinchu, TW;
Mediatek Inc., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
An element-selecting method is utilized for selecting the converting elements of the DAC to perform the digital-to-analog conversion. The element-selecting method first determines whether the selected times of the converting elements are all equal or not. When the selected times of the converting elements are all equal, the element-selecting method determines a shifting-step according to the input signal and the number of the converting elements; otherwise, the element-selecting method determines the shifting-step to be a predetermined value. The element-selecting method then selects a converting element from the DAC by means of separating the converting element from a last selected converting element by the shifting-step. In this way, the error accumulated because of the mismatch of the converting elements is eliminated, and the toggle rate of the DAC is reduced. Hence, the glitch and the dynamic errors of the DAC are reduced, improving the performance of the DAC.