Semiconductor switching circuit

Details Semiconductor switching circuit Semiconductor switching circuit

1974-07-29

1976-09-28

Lynch, Michael J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307313, 307 29, 307 77, 323 25, H03K 1760, G05F 300

Patent

active

039834158

ABSTRACT:
An electronic thermometer is described that is useful for obtaining oral or rectal body temperatures. The thermometer includes a casing on which is mounted a scale for visually indicating temperature readings. A plug-in connector is used to connect an electrical cord to the casing. Such cord terminates in a disposable semiconductor junction through which a constant current is made to flow so that the voltage developed across it is dependent upon its temperature in a straight line function. The casing encloses small operating batteries and low power consumption circuitry for providing the constant current flow through the semiconductor junction and translating voltage changes developed across it into temperature readings.

REFERENCES:
patent: 3225218 (1965-12-01), Cochran
patent: 3600603 (1971-08-01), Watanabe
patent: 3646428 (1972-02-01), Torok
patent: 3649851 (1972-03-01), Cohen

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