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Primary Examiner: Sloyan, Thomas J.
Assistant Examiner:
Attorney: Lorin; C. M.

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Title: Analog signal processing system with correction for amplifier offset

Abstract: Low level analog signals from remote locations are amplified after being converted into two consecutive analog signals of opposite polarities and a digital system causes A/D conversion to occur in two successive readings corresponding to said polarities and an algebraic combination of the two successive readings in binary form provides a true reading which is made available for digital processing by a special control circuit.

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Inventors: Zitelli, William E. (Media, PA, US)
Szabo, Andras I. (Export, PA, US)

Application Number: 482194
Filing Date: 1974-06-24
Publication_date: 1976-02-24
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 341/118 330/9, 330/116, 341/126, 341/141, 370/532
Other Classes:
US Patent Ref:

2972137	Feb, 1961	Dunn	235/154.
3089097	May, 1963	Bell	330/9.
3629719	Dec, 1971	Heller et al.	330/16.

Other Refs: Other References: analog Devices, Inc., "Analog-Digital Conversion Handbook," 6/1972, pp. I-26 to I-33, III-54 to III-57.
Analog Devices, Inc. "Analog-Digital Conversion Handbook," 1972, pp. II-158 to II-163.
Schmid, "Analog to Digital Converters," 1970, pp. 396-404.