Pulse-Driven Josephson Junction Arrays for High-Precision AC-Voltage Synthesis of Unipolar and Bipolar Waveforms. - Marco Schubert; Gerd Wende; Torsten May; Uwe Huebner; Hans-Georg Meyer; Oleg A. Chevtchenko; Helko E. van den Brom; Ernest Houtzager (IEEE Trans. Instrum. Meas., 2007)