WANG Yang, LIU Gao-ping, GUO Feng, et al. Research on models and measuring circuits of ISFET compatible with CMOS technology[J]. 2007, (2): 19-20+24. DOI: 10.13873/j.1000-97872007.02.006.
ion sensitive field effect transistor(ISFET) is combined with CMOS technology to increase integration
decrease price
deduce the system size
improve the system properties and so on.Based on analyzing structures of ISFET sensors compatible with CMOS technology
a kind of measuring circuits is researched.It can reduce body effect
common modle noise
temperature drift and so on.A kind of ISFET measuring circuits is simulated.Relation pattern of output voltage and pH value is similar with the result of theoretical model.