The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2013
Filed:
Nov. 09, 2010
Tai-ping Sun, Taoyuan County, TW;
Chung-yuan Chen, Tainan County, TW;
Hsiu-li Shieh, Taichung, TW;
Tak-shing Ching, Taichung, TW;
Tai-Ping Sun, Taoyuan County, TW;
Chung-Yuan Chen, Tainan County, TW;
Hsiu-Li Shieh, Taichung, TW;
Tak-Shing Ching, Taichung, TW;
National Chi Nan University, Puli, Nantou, TW;
Abstract
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.