Multi-stage analog-to-digital converting device

Details Multi-stage analog-to-digital converting device Multi-stage analog-to-digital converting device

1988-09-07

1990-11-27

Shoop, Jr., William M.

Coded data generation or conversion

Converter compensation

341120, 341156, H03M 106, H03M 114

Patent

active

049739743

ABSTRACT:
An A/D converting device includes an A/D converting section having a plurality of A/D converters arranged in multi-stages. The device further has a reference data generator, a correction value memory and a controller. The data generator sequentially generates pairs of a plurality of reference analog values and reference digital values. The memory is accessed using the digital output of the first stage A/D converter. The controller has a correction mode and an application mode. In the correction mode, the controller executes such a control as to supply the reference analog values to the A/D converting section and write into the memory a difference between an digital output value of a succeeding stage A/D converter and the reference digital values corresponding to the digital output value. In the application mode, the controller executes such a control as to read out a corrected digital value from the memory in accordance with the digital output value of the first stage A/D converter, and supply the corrected digital value, in place of value actually acquired from a preceding stage A/D converter, to the A/D converting section to be synthesized with the digital output value of the succeeding stage A/D converter.

REFERENCES:
patent: 3701145 (1972-10-01), Bergin
patent: 4315254 (1982-02-01), Honjyo et al.
patent: 4612533 (1986-09-01), Evans

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