FET type sensor and a method for driving the same

Details FET type sensor and a method for driving the same FET type sensor and a method for driving the same

1985-02-04

1987-10-06

James, Andrew J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

357 2314, 324 715, H04L 2966

Patent

active

046986570

ABSTRACT:
A field effect transistor-type sensor comprising a field effect transistor device incorporated with a sensitive means exhibiting electric variation due to a physical or chemical interaction with the physical quantity to be detected, wherein an auxiliary electrode for the application of a drift-cancellation voltage to said sensitive means is located on said sensitive means, thereby suppressing the influence of impurities and/or ions contained in the sensitive means and/or the interface between the sensitive means and the field effect transistor device, or impurities and/or ions contaminating the device from the external atmosphere during use thereof, on the operation and/or the output of the field effect transistor device, and maintaining the stable output characteristic over a long period of time.

REFERENCES:
patent: 4020830 (1977-05-01), Johnson et al.
patent: 4180771 (1979-12-01), Guckel
patent: 4322680 (1982-03-01), Janata et al.
patent: 4397714 (1983-08-01), Janata et al.
patent: 4411741 (1983-10-01), Janata
patent: 4512870 (1985-04-01), Kohara et al.
patent: 4514263 (1985-04-01), Janata
IEEE Transactions on Electron Devices, vol. 29, #1, Jan. 1982, pp. 90-94 by Garverich.

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