Development and investigation of intrinsically shunted junction series arrays for ac Josephson Voltage Standards

Different types of intrinsically shunted Josephson junctions have been developed and investigated for ac voltage standard applications at PTB. The first type, for generation of voltages up to 10 V, is driven by a 70 GHz sinusoidal microwave signal and consists of 69,632 series-connected junctions, where the number of junctions per segment follows a binary sequence. The second type, which is driven by short current pulses, contains up to 5,000 junctions and enables the synthesis of intrinsically accurate ac wave-forms.