High sensitivity measurement device for measuring various parame

Details High sensitivity measurement device for measuring various parame High sensitivity measurement device for measuring various parame

1987-11-06

1989-12-26

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

7320415, 7320417, 7320423, 374 43, 374 45, G01F 168

Patent

active

048889873

ABSTRACT:
A sensing element is constituted by a single or plurality of p-n junctions alternating between the foward and reverse states. A pulse circuit applies different magnitudes of foward and reverse currents to the sensing element. A high reverse current is applied for a self heating interval and a small foward current is applied for a sensing interval.

REFERENCES:
patent: 3498128 (1970-03-01), Calvet
patent: 3905230 (1975-09-01), Calvet et al.
patent: 3968685 (1976-07-01), MacHattre
patent: 3988928 (1976-11-01), Edstrom et al.
patent: 3992940 (1976-11-01), Platzer, Jr.
patent: 4304129 (1981-12-01), Kawai et al.
patent: 4399697 (1983-08-01), Kohama et al.
patent: 4587843 (1986-05-01), Tokura et al.

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