Josephson serial-to-parallel decoder

We present the design and experimental demonstration of a 5-b serial-to-parallel decoder for a crossbar application. A serial train of seven bits is provided at the input with the first five being the code for selecting one of 32 output lines. The last two constitute the code that determines if the selected decoder in the crossbar switch should generate an output. Several circuit innovations were needed to meet the severe restrictions on power, current, and area required for the crossbar application. Operation of the circuit was demonstrated at 2 Gb.