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A fast negative impedance converter for JAWS load compensation



Jason Underwood, Stephen Pfeiffer, Geoffrey Palo


For accurate realization of the ac volt, the Josephson Arbitrary Waveform Synthesizer (JAWS) must not be overly loaded by the electrical network in which it is used. The interaction between the on-chip inductance and the stray capacitance in the network can yield significant errors. Such errors are compounded for low-impedance devices, such as thermal voltage converters and thermal transfer standards (TTS). This paper describes a negative impedance converter that has been designed to handle such loads up to 100 kHz. We discuss the motivation for the device, its design, and present some initial ac-ac difference measurements with a TTS.
Proceedings Title
2020 Conference on Precision Electromagnetic Measurements (CPEM)
Conference Dates
August 23-28, 2020
Conference Location
Denver, CO, US


quantum voltage standards, AC voltage, ac dc difference, load compensation, negative impedance converter


Underwood, J. , Pfeiffer, S. and Palo, G. (2020), A fast negative impedance converter for JAWS load compensation, 2020 Conference on Precision Electromagnetic Measurements (CPEM), Denver, CO, US, [online], (Accessed May 25, 2024)


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Created September 10, 2020, Updated May 31, 2023