Analogue to digital converter
Patent 4571574 Issued on February 18, 1986. Estimated Expiration Date: 
February 18, 2003. 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.
February 18, 2003. 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 References 3585631 Analog-to-digital converter Digitally sampled high speed analog to digital converter Analog to digital converter Fully parallel threshold type analog-to-digital converter Patent #: 4417233 InventorApplicationNo. 06/429846 filed on 09/30/1982US Classes:341/158Analog input compared with static referenceExaminersPrimary: Krass, Errol A.Assistant: Herndon, Heather R. International ClassH03M 1/00 (20060101)AbstractAn analogue to digital converter using several flash converter units to convert successively the increasingly lower orders of resolution, wherein the transition from a stage of lower magnitude of resolution to that stage of successively higher magnitude of resolution is obtained by physically isolating the resistor element of the resistor ladder of the first flash converter wherein the unresolved portion of the input voltage falls, and substituting a second flash converter comprising a resistor ladder of same total resistance as the resistor element it replaces but of higher resolution by one order of magnitude; then repeating the same with each successive flash converter.Other References
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