Circuit for measuring diffusion-limited current

Details Circuit for measuring diffusion-limited current Circuit for measuring diffusion-limited current

1987-07-15

1990-03-13

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

204406, 204425, 324446, G01N 2704

Patent

active

049085751

ABSTRACT:
A circuit is utilized for measuring a diffusion-limited current which flows through a diffusion-limited current element in proportion to an oxygen concentration which includes an output resistor connected in series with the element, a differential amplifier having a first input connected to a reference voltage supply source, a second input connected to ground, an output connected to the output resistor, and a feedback resistor connected between the first input of the differential amplifier and a point between the element and the output resistor, so that a bias voltage applied across the element is kept constant.

REFERENCES:
patent: 4464244 (1984-08-01), Uchida et al.
patent: 4543176 (1985-09-01), Harada et al.
patent: 4595485 (1986-06-01), Takahashi et al.
patent: 4702816 (1987-10-01), Hashimoto et al.
patent: 4718999 (1988-01-01), Suzuki et al.

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