Title :
Improving speed and accuracy of AC-DC transfer using a fast reversed DC
Author :
Klonz, M. ; Zirpel, R. ; Stojanovic, B.
Author_Institution :
Physikalisch-Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
It is shown that by using a fast-reversed DC instead of a steady-state DC of both polarities for AC-DC transfer, the speed and the accuracy of the transfer are improved, because the second-order Thomson and Peltier effects are eliminated. An accurate high-speed buffer has been developed for fast reversing with analog switches. The buffer has high input impedance, high-speed switching capability from plus to minus DC. 10-V and 10-mA output capability, and high amplitude accuracy. Measurement results are reported.<>
Keywords :
convertors; electric current measurement; switches; voltage measurement; 10 V; 10 mA; AC-DC transfer; Peltier effects; Thomson effect; analog switches; buffer; fast reversed DC; high-speed buffer; high-speed switching; reversing; thermal convertor; thermoelectric convertor; Analog-digital conversion; Circuits; Control systems; Impedance; Steady-state; Switches; Switching converters; Temperature distribution; Thermoelectricity; Voltage control;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.109926
