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US 6,856,269 B1Granted
D/A conversion method and D/A converter
AssigneeWinbond Electronics Corp.
InventorMing-Yung Shih
Life of this patent
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Abstract
A D/A conversion method and D/A converter. First, an m-bit data is input, wherein the m-bit data includes upper n bit data and lower m−n bit data. Then, a first n bit data is obtained by transforming the upper n bit data. Finally, the upper n bit data is applied to an n-bit D/A converter for a first duration and the first n-bit data is applied to the n-bit D/A converter for a second duration, according- to the lower m−n bit data.
Claims19
A D/A conversion method comprising the steps of:
- inputting an m-bit data, wherein the m-bit data includes upper n bit data and lower m−n bit data;
- obtaining a first n-bit data by transforming the upper n-bit data;
- and
- applying the upper n-bit digital data to a n-bit D/A converter for a first duration and the first n-bit data to the n-bit D/A converter for a second duration, according to the lower m−n bit data.
1 more element
A D/A converter, comprising:
- a storage unit for receiving m-bit data, wherein the m-bit data includes upper n-bit digital data and lower m−n bit data;
- a multiplexer coupling to the storage unit for receiving the upper n-bit data and a first n-bit data transformed from the upper n-bit data;
- a pulse width modulator coupling to the storage unit and controlled by the lower m−n bit data to output the upper n-bit digital data for a first duration and the first n-bit data for a second duration;
- and
- an n-bit D/A converter unit coupling to the multiplexer for receiving and transforming the upper n bit data and the first n-bit data to a corresponding analog signal.
2 more elements
Dependencies are inferred from the claim text.