Statistically based continuous autocalibration method and apparatus
CA 2029944 C · Owner: Hewlett-Packard Company · Inventors: Hilton, Howard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Errors in a sampled data process are discerned statistically throughout the process, permitting their efficient removal. An exemplary application is a subranging, analog-to-digital converter (ADC) (10) in which errors associated with , component digital-to-analog (DAC) current sources (28 30, 32) are discerned and , corrected, automatically during the circuit's normal operation. This is achieved by continually, introducing a random signal into the process statistically examining the DAC , output signal to discern error terms, and correlating the occurrences of these errors with the, values of the random signal applied to the DACs so as to identify the current sources, to which the error …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 14, 1990 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2012.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.