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Expired Canadian patentCanada

Method and control system for generating a variable output bit resolution from an n bit analog to digital converter

CA 1293809 C · Owner: Alliedsignal Inc. · Inventors: Wright, Danny Orlen; Wiggins, Kregg Steven

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Abstract From the Canadian patent

In a digital control system wherein control voltages are analog voltages, a method and control system for generating a variable output bit resolution from an N bit analog to digital converter (10) utilizing a control circuit to control the input spread of the voltage references to the A/D converter. Depending on the binary value of the MSD position, the input reference voltage spread is controlled. If the binary value is zero, the input reference voltage spread is one-half the normal value and the resolution is N+l bits and if the binary value is zero for both the MSD and MSD-l positions, the input reference voltage spread is one-fourth the normal value and the resolution is N+2 hits and so …

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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

  • Granted December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 16, 1989
GrantedDecember 31, 1991
Term endedDecember 31, 2008
Patent numberCA 1293809 C
Classification (IPC)H03M1/16 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedFeb 16, 1989Patent grantedDec 31, 1991Term endedDec 31, 2008

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.