Measuring circuit with a biosensor utilizing ion sensitive field

Details Measuring circuit with a biosensor utilizing ion sensitive field Measuring circuit with a biosensor utilizing ion sensitive field

1992-11-24

1994-05-03

Wieder, Kenneth A.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Semiconductors for nonelectrical property

324158T, 324705, 204403, 204418, G01N 2700

Patent

active

053090853

ABSTRACT:
A measuring circuit with a biosensor utilizing ion sensitive field effect transistors having a simplified structure and is advantageous to integration. The measuring circuit comprises two ion sensitive FET input devices composed of an enzyme FET having an enzyme sensitive membrane on the gate and a reference FET, and a differential amplifier for amplifying the outputs of the enzyme FET and the reference FET. The drift phenomena of the ISFETs due to the use of a non-stable quasi-reference electrode as well as the temperature dependence thereof can be eliminated by the differential amplifier consisting of MOSFETs having the same channel as the ISFETs. The ISFET biosensor and the measuring circuit can be integrated into one chip.

REFERENCES:
patent: 3358223 (1967-12-01), Birnstingl
patent: 4233033 (1980-11-01), Eifler et al.
patent: 4374013 (1983-02-01), Enfors
patent: 4385274 (1983-05-01), Shimada et al.
patent: 4490678 (1984-12-01), Kuisl et al.
patent: 4513280 (1985-04-01), Hannan et al.
patent: 4657658 (1987-04-01), Sibbald
patent: 4789825 (1988-12-01), Carelli et al.
patent: 4812220 (1989-03-01), Iida et al.
patent: 4839000 (1989-06-01), Eddowes

Affiliated with

Also associated with

Rating

Measuring circuit with a biosensor utilizing ion sensitive field does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Measuring circuit with a biosensor utilizing ion sensitive field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring circuit with a biosensor utilizing ion sensitive field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2117325