25-GHz Operation of ERSFQ Time-to-Digital Converter
| Autor: | T.V. Filippov, Anubhav Sahu, D.E. Kirichenko, M. Eren Celik, Mustapha Habib, Deepnarayan Gupta, Andrei Talalaevskii |
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| Rok vydání: | 2021 |
| Předmět: |
Digital electronics
Computer science business.industry Clock rate Electrical engineering Converters Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Frequency divider Time-to-digital converter Transmission line Rapid single flux quantum 0103 physical sciences Electrical and Electronic Engineering 010306 general physics business Electronic circuit |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 31:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2021.3065282 |
| Popis: | Fast time-to-digital converters (TDCs), used to convert a continuous time interval into discrete number for further processing, serve diverse applications ranging from photon/particle detectors to communication systems employing delay-encoded pulses. Being a multi-rate digital circuit, the TDC is also a good candidate to explore operation of Energy-Efficient Rapid Single Flux Quantum (ERSFQ) circuits at high (>10 GHz) clock frequency. We designed a TDC using ERSFQ cells, targeting the 10-kA/cm2 SFQ5ee fabrication process at MIT Lincoln Laboratory. The main elements of the circuit comprise a 9-bit binary ripple counter and a parallel-to-serial converter. A frequency divider and a pulse distribution network with a decision-making element are designed to control the operation. The ERSFQ TDC was operated up to 25 GHz clock frequency (40 ps time resolution) and with a power consumption of around 14 µW for all ERSFQ components. The design specifications such as number of junctions and area will be discussed together with the power delivery technique involving an over-pumped feeding Josephson transmission line (JTL). |
| Databáze: | OpenAIRE |
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