Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2011-06-21
2011-06-21
Mai, Lam T (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C375S238000
Reexamination Certificate
active
07965213
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.
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Hsueh Kang-Wei
Lin Tse-Chi
Liu Chang-Shun
Tu Yu-Hsuan
Hsu Winston
Mai Lam T
Margo Scott
Mediatek Inc.
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