A Precision Ac-dc Differential Voltmeter/dc Standard with High Versatility
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Development of a High-precision Ac-dc Transfer Standard Using the Fast-reversed Dc Method
The ac-dc transfer standard is one of the basic electrical standards, by which the ac voltage and ac current are deduced from their dc counterparts in the frequency range between 10 Hz and 1 MHz [1,2]. The dc voltage standards are established using a Josephson voltage standard with uncertainty better than 10-7 [3-5]. The ac voltage standard in the frequency range 10 Hz to 1 MHz are derived from...
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We present ac-dc transfer standard measurements using the NIST pulse-driven ac Josephson voltage standard source. We have investigated the frequency dependence for several output voltages up to 200 mV for frequencies from 2.5 kHz to 100 kHz. We found that as the frequency increases, the ac-dc differences for the two arrays on the same chip do not agree. We investigated different attempts of imp...
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