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Generated: September 22, 2017

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Title: Circuits for increasing the reliability of an iontophoretic system
Abstract:Circuits are provided for increasing the reliability of an iontophoretic drug delivery system. Such circuits detect the failure of a crystal oscillator of the system, the failure of a voltage reference of the system, or the impending failure of a battery power source of the system.
Inventor(s): Flower; Ronald J. (Atlanta, GA), Garde; Kenneth E. (New Windsor, NY), Walter; Steven D. (Vernon, NJ)
Assignee: Vyteris, Inc. (Fair Lawn, NJ)
Filing Date:Apr 22, 2002
Application Number:10/127,333
Claims:1. A circuit for detecting an impending failure of a battery in an iontophoretic system comprising: a microprocessor having an analog-to-digital (A/D) converter for converting an analog input to a digital output, said microprocessor capable of selecting between a voltage reference voltage V.sub.ref and a battery voltage V.sub.cc as a reference for the A/D converter, wherein when V.sub.cc is selected as the A/D reference, V.sub.ref is read by said A/D converter of said microprocessor as the analog input, the A/D converter outputting a digital count proportional to the ratio (V.sub.ref /V.sub.cc), wherein the impending failure of the battery is determined when the digital count is greater than a predetermined threshold.
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Serving 500+ biopharmaceutical companies globally:

Fish and Richardson
AstraZeneca
Deloitte
UBS
US Army
Cantor Fitzgerald
Medtronic
Harvard Business School
Daiichi Sankyo
Dow

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