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Pemakaian Resistor Karbon dan Dioda Sambungan P-N dalam Thermometry Suhu Rendah

Marsongkohadi, A. Kreshna & Ngurah Made Agung

 


Abstract. The characteristic of some commercially manufactured carbon resistors and p-n junction diodes are measured from 80K to 220K. Datas of the resistors fit the three-parameter equation of Clement-Quinnell. Temperatures calculated by this equation are within 0.5 percent, of the measured temperatures. Thermometric sensitivity is such that by measuring resistance to one part in 1000, it is possible to detect temperature changes of 0.4K at 93K. Temperatures are reproducible within about 4 percent, from run to run. In some p-n junction diodes, we have observed nearly linear T-V characteristic from room temperature to liquid nitrogen temperature. In addition these diodes exhibit good repeatability on temperature cycling. The slope of the T-V characteristic with current as a parameter, is explained by assuming that the device conducts primarily recombination-generation current according the theory of Sah, Noyce and Shockley.

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