Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2007-12-04
2007-12-04
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S144000
Reexamination Certificate
active
11419067
ABSTRACT:
A digital-to-analog converter includes: a resistor string; a plurality of first switches each connected between an output node and a corresponding one of first endmost, second endmost and intermediate nodes of the resistor string; a decoding unit adapted for converting a higher-order portion of a digital signal into a decoder signal used to control the first switches such that one of which is selected according to the higher-order portion to connect the corresponding one of the nodes to the output node; and first and second voltage-setting units adapted to be connected between one of first and second reference voltage sources and one of the first and second endmost nodes of the resistor string, and operable in response to a lower-order portion of the digital signal to adjust voltages at the first endmost, second endmost and intermediate nodes of the resistor string according to the lower-order portion of the digital signal.
REFERENCES:
patent: 5139782 (1992-08-01), Jung
patent: 5495245 (1996-02-01), Ashe
patent: 5617091 (1997-04-01), Uda
patent: 6166672 (2000-12-01), Park
patent: 6201491 (2001-03-01), Brunolli et al.
Chen Chun-Chieh
Hsu Chin-Hung
Lin Wan-Ru
Lu Nan-Ku
Chung Yuan Christian University
Jean-Pierre Peguy
King Justin I.
Lin Wan-Ru
WPAT, P.C.
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