發明
中華民國
099111407
I 400888
離子感測電路
國立暨南國際大學
2013/07/01
一種離子感測電路包含:一離子感測元件,適用於曝露到一電解液以產生相關於電解液之離子濃度的一感應電流;一電流至電壓轉換器,電連接到離子感測元件以將感應電流轉換成一轉換電壓;一比較器,電連接到電流至電壓轉換單元,用以比較轉換電壓及一臨界電壓以產生一比較結果;及一閂鎖器,電連接到比較器及電流至電壓轉換器,以根據時鐘信號對比較結果進行取樣,以產生一數位信號,作為電流至電壓轉換器將該感應電流轉換成該轉換電壓的參考,能直接輸出相關於離子濃度的數位信號,以降低成本和具有抗雜訊的能力,更能簡化比較器的設計。 An ion sensing circuit includes an ion sensing element configured for exposure to an electrolytic solution and control of a sensing current through the ion sensing element according to an ion concentration of the electrolytic solution. The ion sensing circuit further includes a current-to-voltage converter coupled electrically to the ion sensing element for generating a converted voltage from the sensing current. The ion sensing circuit also includes a comparator coupled electrically to the current-to-voltage converter for comparing the converted voltage and a threshold voltage to form a comparison result. In addition, the ion sensing circuit includes a latch coupled electrically to the comparator and the current-to-voltage converter. The latch is configured for sampling the output of the comparator according to a clock signal to generate a digital signal used by the current-to-voltage converter for converting the sensing current to the converted voltage.
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