A REFERENCE ELECTRODE AND A METHOD THEREOF

摘要

A reference electrode (130) for sensing pH is provided in an ambient electrolyte solution in an ion sensitive field effect transistor (ISFET) (100) which includes a source (160), a drain (150) and a gate (140), characterized in that, the reference electrode (130) includes an alternating current source, an insulating membrane separating the reference electrode (130) from the ambient electrolyte solution, a direct current (DC) biasing voltage (170) at the gate (140) wherein the voltage is a predetermined constant voltage, wherein the reference electrode (130) is connectable to the alternating current source (120) where the reference electrode (130) is further included in the gate (140) and the reference electrode (130) is constructed from Complementary metal-oxide-semiconductor (CMOS) compatible metal.