Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1987-09-11
1989-06-27
Shoop, Jr., William M.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341118, 341165, 364722, 367 66, H03M 118
Patent
active
048433950
ABSTRACT:
An analog-to-digital converter system for converting an input analog signal having a wide dynamic range to a digital output has a non-linear function generator for compressing the wide dynamic range input signal to a reduced dynamic range signal, an analog-to-digital converter of limited dynamic range for converting the reduced dynamic range signal to a digitally formatted signal, and a conversion memory for providing a digital value corresponding to the value of the wide range analog input. The digitally formatted signal addresses a word within the conversion memory, the word so addressed containing a digital value corresponding to the magnitude of the analog input signal. Each word of the conversion memory has a sufficient number of bits for expressing the desired dynamic range of the input signal. In one embodiment of the invention a digital counter and a digital to analog converter provides for calibrating the system, the output of the counter being stored in the conversion memory which, in this embodiment, is composed of RAM data storage elements.
REFERENCES:
patent: 4338589 (1982-07-01), Engel et al.
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. I-34 to I-37; I-54 to I-59; I-64 to I-67; II-52 & II-53; and II-122 to I-129.
Hughes Aircraft Company
Karambelas A. W.
Shoop Jr. William M.
Streeter William J.
Young Brian K.
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