A new type of demultiplexer for gaining timing margin

✍ Scribed by F. Furuta; K. Saitoh

• Book ID: 103890080
• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 533 KB
• Volume: 412-414
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2003.12.093

✦ Synopsis

We propose a new type of demultiplexer (DEMUX), a ''hybrid DEMUX'' based on single flux quantum (SFQ) circuitry. It consists of a 1-to-M binary-tree DEMUX and M sets of 1-to-N shift-dump DEMUXes. It distributes input data signals to M Â N channels. The timing margin for synchronization between this DEMUX and the back-end circuit is M Â ðN À 1Þ times as large as that for a binary-tree DEMUX. The operating frequency of the hybrid DEMUX is as high as that of a binary-tree DEMUX. We designed and tested a 1-to-16 hybrid DEMUX (M ¼ 4, N ¼ 4). The output distributed data sets were identical to the input data sequences, and a larger timing margin of 12 clock periods was obtained. These results indicate that the hybrid DEMUX was operated correctly.