Title :
Micropotentiometers with New Disc Resistors and Planar Multijunction Thermal Converters Calibrating High Input Impedance mV-Amplifier
Author :
Klonz, M. ; Schliestedt, G. ; Funck, T. ; Stojanovic, M. ; Stojanovic, B.
Author_Institution :
Phys.-Technische Bundesanstalt Bundesallee, Braunschweig
Abstract :
In the new design of micropotentiometers (upots) planar multijunction thermal converters (PMJTCs) are used together with a new design of the housing and new disc resistors. Only two upots are needed for the step-down chain from 100 mV to 2 mV. A new mV-amplifier in conjunction with a PMJTC is designed to measure the output voltage of the upots. Its high input impedance of >1 MOmega par <10 pF avoids the loading of the output resistor of the upots. Uncertainties in the mV-ac-dc transfer are reduced considerably
Keywords :
amplifiers; calibration; measurement uncertainty; potentiometers; voltage measurement; 2 to 100 mV; disc resistors; high input impedance mV-amplifier; micropotentiometers; planar multijunction thermal converters; uncertainties; Calibration; Dynamic voltage scaling; FETs; Frequency response; Impedance; Instruments; Radiofrequency amplifiers; Resistors; Thermal resistance; Voltage measurement;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location :
London
Print_ISBN :
0-7803-8494-6
Electronic_ISBN :
0-7803-8494-6
DOI :
10.1109/CPEM.2004.305522
