Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2007-10-23
2007-10-23
Mai, Lam T. (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S144000
Reexamination Certificate
active
11464237
ABSTRACT:
Systems for displaying images. The system comprises a digital-to-analog converter, in which a first conversion stage selects first and second voltages of a plurality of reference voltages according to m most significant bits of a k bit input signal; and a second conversion stage converting n least significant bits of the k bit input signal to a voltage between the first and second voltages. In the second conversion stage, according to first and second bits of the least significant bits, a first switching capacitor unit charges a first capacitor during a first period and then the second switching capacitor unit performs a first charge sharing between the first capacitor and a second capacitor, and the first switching capacitor unit charges the first capacitor again and then the second switching capacitor unit performs a second charge sharing between the first capacitor and the second capacitor.
REFERENCES:
patent: 6556162 (2003-04-01), Brownlow et al.
Hsueh Fu-Yuan
Lin Wei-Cheng
Sano Keiichi
Yu Cheng-Ho
IPO Displays Corp
Mai Lam T.
Thomas Kayden Horstemeyer & Risley
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