Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1995-07-03
1996-12-03
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
H03M 116
Patent
active
055812554
ABSTRACT:
An analog to digital converter for the conversion of an analog input voltage to a digital output voltage signal of n bits has a plurality of voltage sources (Voltage Reference Generator) that divide 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 an upper segment or Most Significant Bits (MSB) and a lower segment or Least Significant Bits (LSB). The Most Significant bits are encoded from a set of digital signals from a plurality of comparators (Coarse Subrange Comparators) that compare the voltage input with a subset of Voltage Reference Generator representing the coarse range. The Coarse Subrange Comparator outputs are used to determine the placement of a plurality of Embedded Subrange Comparators that are used to detect any error in the codes of the Coarse Subrange Comparators. The output of the Coarse and Embedded Subrange Comparators are now used to determine the connection of a plurality of Fine Subrange Comparators to the Voltage Reference Generator in the section of the Coarse Subrange to accurately determine the smallest increment of resolution for the Analog to Digital Converter. The codes from the Coarse, Embedded, and Fine Subrange Comparators become the input to an encoder to determine the output digital voltage that represent the input voltage.
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Industrial Technology Research Institute
Saile George O.
Young Brian K.
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