Title :
An active filter for Delta-Sigma modulated Josephson waveforms
Author :
Bergsten, Tobias ; Eklund, Gunnar ; Tarasso, Valter ; Rydler, Karl-Erik
Author_Institution :
SP Tech. Res. Inst. of Sweden, Boras, Sweden
Abstract :
We present an active low pass filter constructed for Delta-Sigma modulated Josephson waveforms. The filter has a fifth order Butterworth characteristic with high input impedance and stable passband performance, including dc. We present results from frequency response, input impedance characteristics, passband ac-dc measurements and spectra of a Delta-Sigma modulated sine wave from a programmable Josephson voltage standard.
Keywords :
Butterworth filters; Josephson effect; active filters; delta-sigma modulation; frequency response; low-pass filters; measurement standards; voltage measurement; active low pass filter; delta-sigma modulated Josephson waveforms; delta-sigma modulated sine wave; fifth order Butterworth characteristic; frequency response; input impedance characteristics; passband ac-dc measurements; programmable Josephson voltage standard; Frequency measurement; Frequency response; Impedance; Impedance measurement; Noise; Passband; Standards; Active filters; Josephson voltage standards; analog circuits; harmonic distortion; low pass filters;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898487
