NASA NTRS · 19940017228
Analog/digital pH meter system I.C.
Abstract
The project utilizes design automation software tools to design, simulate, and fabricate a pH meter integrated circuit (IC) system including a successive approximation type seven-bit analog to digital converter circuits using a 1.25 micron N-Well CMOS MOSIS process. The input voltage ranges from 0.5 to 1.0 V derived from a special type pH sensor, and the output is a three-digit decimal number display of pH with one decimal point.
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Vincent, Paul, Park, Jea. 1992-01-01. Analog/digital pH meter system I.C.. https://ntrs.nasa.gov/citations/19940017228
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