US Patent 7842174 Electrochemical chip with miniaturized sensor array
Patent 7842174 was granted and assigned to Utah State University on November, 2010 by the United States Patent and Trademark Office.
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A handheld sensor device is provided for measuring an ion concentration in a solution. The solution is in an electrochemical cell that includes a counter electrode, a working electrode, and a reference electrode. The sensor includes a control amplifier configured to provide a current through the counter electrode and the working electrode so as to maintain a predetermined voltage between the working electrode and the reference electrode. The sensor also includes a current amplifier configured to measure the current provided through the counter electrode and the working electrode. In one embodiment, the sensor also includes a direct digital frequency synthesizer (DDFS) including a phase accumulator. The DDFS is configured to selectively generate a waveform specified by an electrochemical technique such as square wave voltammetry, cyclic voltammetry, linear sweep voltammetry, differential-pulse polarography, normal-pulse polarography, or other known electrochemical techniques. An example microelectrode array usable with the handheld sensor is also provided.
US Patent 07842174 Electrochemical chip with miniaturized sensor array US Patent 7842174 Electrochemical chip with miniaturized sensor array
US Patent 07842174 Electrochemical chip with miniaturized sensor array
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