Large dynamic range analog to digital converter
Patent 4843395 Issued on June 27, 1989. Estimated Expiration Date: 
September 11, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 11, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAutocalibration of compressed A/D converter Patent #: 4338589 InventorApplicationNo. 07/095500 filed on 09/11/1987US Classes:341/156, Coarse and fine conversions341/118, CONVERTER COMPENSATION341/165, Single comparator and digital storage367/66, Analog/digital compatible systems708/277Logarithmic/exponentialExaminersPrimary: Shoop, William M. Jr.Assistant: Young, Brian Attorney, Agent or FirmInternational ClassH03M 1/00 (20060101)AbstractAn 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.Other References
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