Title: Autocalibration of compressed A/D converter

Abstract: An analog-to-digital converter system is disclosed in which the amplitude of the signal is compressed by means including a logging means prior to an analog-to-digital converter. Reference signals of known values are applied to the logging means and their values at the output of the converter are used to determine a linearity factor which is applied to a multiplier coupled to the output of the converter. The amplitude of one of the reference signals at the output of the multiplier is compared with what it should be and the difference is added by an adder at the output of the multiplier.

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Inventors: Engel, Steven J. (West Whiteland, PA)
Marsh, Richard E. (Kemblesville, PA)
Rhodes, Robert P. (Newark, DE)

Application Number: 06/011822
Filing Date: 1979-02-13
Publication_date: 1982-07-06
Assignee: HEWLETT PACKARD CO

Primary Class(es): 341/120 367/66, 708/277
Other Classes: H03M1/00; H03K13/02
US Patent Ref:
Other Refs: Other References: The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 1972, pp. II-158, 159.
Wells, College Algebra, D. C. Heath & Co., 1899, pp. 352-359.

Primary Examiner: Sloyan, Thomas J.
Assistant Examiner:
Attorney: Timbie, Donald N.

Claims:

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