Thermocouple measurement device with improved input ground chara

Details Thermocouple measurement device with improved input ground chara Thermocouple measurement device with improved input ground chara

1996-12-19

1998-06-16

Bennett, G. Bradley

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

G01K 710

Patent

active

057659494

ABSTRACT:
A method and apparatus for reducing the effects of ground loops in a thermocouple measurement device employing a differential amplifier for signal amplification. A resistor is coupled at the input of the differential amplifier to provide a DC ground reference. A capacitor is coupled in parallel to the resistor to compensate for AC noise and prevent the inputs from floating out of common mode range.

REFERENCES:
patent: 3211001 (1965-10-01), Pettit
patent: 3688580 (1972-09-01), Jarzembski
patent: 3924470 (1975-12-01), Sander
patent: 4854723 (1989-08-01), Her
Applied Ideas--Acquisition and digitizing of singals proportional to temperature. Electrotechnology, vol. 8, No. 4 (Oct. 1980), p. 120.

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