Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2008-05-06
2008-05-06
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S138000
Reexamination Certificate
active
10997918
ABSTRACT:
A D/A converter inputted with non-linear conversion digital data such as a digital signal encoded according to a μ-Law system or the like as it is to convert into an analog signal. A D/A converter is of resistor string type, in which a resistance value of each of resistors of a resistor string is not set uniform but weighted so that a non-linear relationship between an encoded input digital signal and an output analog signal is converted into a linear relationship. Consequently, a decode circuit for converting non-linear conversion digital data into linear conversion digital data is not required.
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European Search Report dated Mar. 29, 2006 for Application No. 04028257.6.
Koyama Jun
Miyake Hiroyuki
Miyata Kazuhiko
Jean-Pierre Peguy
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Semiconductor Energy Laboratory Co,. Ltd.
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