Multiple function stable sensor circuitry

A - Human Necessities – 61 – B

Patent

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A61B 5/02 (2006.01)

Patent

CA 2641960

Multiple function stable circuitry measures both pressure and temperature for example. It includes both a pressure sensitive capacitor, and fixed reference capacitor, and also includes both a constant current source and a temperature variable current source. The complete cycle includes at least two phases, with one phase of the cycle utilizing one reference capacitor and one pressure variable capacitor; and at least one other phase including the reference capacitor and at least one temperature variable charging source. Other multiple slope multiple functions may also be implemented.

L'invention concerne un ensemble de circuits stable multifonction mesurant à la fois la pression et la température par exemple. Cet ensemble intègre à la fois un condensateur sensible à la pression et un condensateur de référence fixe et comporte à la fois une source de courant constant et une source de courant variable en fonction de la température. Le cycle complet comprend au moins deux phases, une phase du cycle utilisant un condensateur de référence et un condensateur variable en fonction de la pression et au moins une autre phase intégrant le condensateur de référence et au moins une source de charge variable en fonction de la température. D'autres fonctions multiples à pentes multiples peuvent être également mises en oeuvre.

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