Title :
New thin-film multijunction thermal converters with negligible low frequency ac-dc transfer differences
Author :
Laiz, H. ; Klonz, M. ; Kessler, E.
Author_Institution :
Inst. Nacional de Tecnologia Ind., San Martin, Argentina
Abstract :
The ac-dc transfer differences of thin-film thermal converters at low frequencies are caused by nonlinearities of the heat transport mechanisms and of the thermal-to-electric conversion. A compensation circuit has been designed which results in converters with ac-dc transfer differences below 0.3/spl middot/10/sup -6/ at 10 Hz. The standard uncertainty of the ac-dc transfer difference measurement was reduced to 0.3/spl middot/10/sup -6/ at 10 Hz.
Keywords :
compensation; convertors; electric current measurement; measurement standards; thin film resistors; voltage measurement; 10 Hz; Ni; ac-dc transfer; compensation circuit; heat transport; nonlinearities; standard uncertainty; thermal-to-electric conversion; thermocouples; thin-film multijunction thermal converters; Analog-digital conversion; Frequency conversion; Heat transfer; Measurement standards; Resistance heating; Temperature; Thermal resistance; Thermoelectricity; Transistors; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.851124
