Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1996-07-17
1998-04-28
Gaffin, Jeffrey A.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
H03M 116
Patent
active
057450676
ABSTRACT:
An analog to digital converter for the conversion of an analog input signal to a digital output code of n bits has a plurality of voltage references created in a voltage reference generator that divides the total range of voltage of the conversion input into increments of voltage equal to the smallest increment of resolution. The n bits of digital output are divided into most significant bits and least significant bits. The most significant bits are encoded from a set of digital signals that are formed in a set of coarse comparators, that compare the analog input signal with a subset of the voltage references representing the coarse range. The digital code that is the output of the coarse comparators is used to determine the selection of the subset of the plurality of the voltage references that are the fine voltage references. The least significant bits are encoded from a set of digital signals that are formed in a set of fine comparators that compare the analog input signal to the fine voltage references. The digital codes that form the most significant bits and the least significant bits are corrected encoded in an output encoder to form the digital output word.
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Chou Shu-Kuang
Kao Hsueh-Wu
Lin Yung-Yu
Ackerman Stephen B.
Gaffin Jeffrey A.
Industrial Technology Research Institute
Saile George O.
Vick Jason H.
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