Embedded programmable sensor calibration apparatus
CA 2178936 A1 · Owner: Juntunen, Robert D. · Inventors: Juntunen, Robert D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for quick and low cost calibration of a sensor. The device includes an amplifier a switch, a gain circuit, an offset, circuit and a memory. The memory which may be serial written memory including static RAM and a shift register stores gain and offset, coefficients for use by the gain and offset circuits and the amplifier. The gain and offset circuits may include digital to analog converters for converting the stored gain and offset digital values into analog equivalents. The gain and offset values are calculated by first measuring am uncorrected sensor output at no input and at full scale output. These values are then used in an equation to calculate offset and gain values.
Read the whole patent
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 December 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.