Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1982-05-17
1985-02-05
Frankfort, Charles
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374178, G01K 700
Patent
active
044975864
ABSTRACT:
An electronic Celsius thermometer circuit suitable for fabrication in integrated circuit form has an output directly related to the temperature scale. The zero crossing is created by subtracting a negative-temperature-coefficient voltage from a positive-temperature-coefficient voltage with one of the voltages being made adjustable and set to equal the other. The output response is set to provide the desired temperature scale. If desired the zero crossing and temperature scale can be set for Fahrenheit readings as well as for Celsius. A circuit improvement is also disclosed for compensating the thermometer for departures from linearity.
REFERENCES:
patent: 3809929 (1974-05-01), Vittoz
patent: 4004462 (1977-01-01), Dobkin
patent: 4063116 (1977-12-01), Schmoock
patent: 4071813 (1978-01-01), Dobkin
patent: 4207481 (1980-06-01), Dobkin
patent: 4284334 (1981-08-01), Magel
patent: 4348633 (1982-09-01), Davis
patent: 4350904 (1982-09-01), Cordell
patent: 4401898 (1983-08-01), Sommerer
S 7308-0028-Y, "Integrated circuit temperature controller" by Dance, Australian Electronics Engineering, Apr. 1976.
Frankfort Charles
National Semiconductor Corporation
Pollock Michael J.
Schuster David R.
Winters Paul J.
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