caa a22 4500 445381272 CHVBK 20180317143018.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0866-x doi (NATIONALLICENCE)springer-10.1007/s10948-010-0866-x Design of Relaxation Oscillator Based Ultra-wideband SFQ Amplifier for Chip to Chip Interconnection [Elektronische Daten] [Bilgiday Yuce, Ali Bozbey] In Rapid Signal Flux Quantum (RSFQ) logic circuits, on-chip interconnects and multichip module implementations for nearby distances have already been established. However, the flexible interconnection of two distant chips is still not achieved reliably due to impedance mismatching and attenuation. In this work, we propose a circuit that allows the usage of Passive Transmission Lines (PTLs) to transfer single-flux-quantum (SFQ) pulses between two distant chips which are separated by a distance greater than 10 cm by using 50Ω transmission lines. For this purpose, we design an SFQ amplifier circuit to deal with impedance mismatch and attenuation problems. The circuit consists of two main parts: a relaxation oscillator (RO) circuit and an impedance transformer. The RO circuit utilizes relaxation oscillations occur in the underdamped Josephson junctions. The impedance matching circuit is an 8-section Chebyshev quarter-wave transformer and it eliminates impedance mismatching problem between the amplifier circuit and PTL. We performed circuit simulations and obtained voltage amplitude of about 600μV at the output of the circuit. The transformer has a broadband impedance matching with a fractional bandwidth (ratio of the bandwidth of a device to its central frequency) of 1.4 and a maximum Voltage Standing Wave Ratio (VSWR, the maximum voltage divided by minimum voltage on the transmission line) of 1.5. Springer Science+Business Media, LLC, 2010 RSFQ nationallicence Josephson effect nationallicence PTL nationallicence Chebyshev multisection impedance transformer nationallicence Relaxation oscillator nationallicence Yuce Bilgiday Department of Electrical and Electronics Engineering, TOBB Economy and Technology University, Ankara, Turkey aut Bozbey Ali Department of Electrical and Electronics Engineering, TOBB Economy and Technology University, Ankara, Turkey aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 1071-1075 1557-1939 24:1-2<1071 2011 24 10948 https://doi.org/10.1007/s10948-010-0866-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0866-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yuce Bilgiday Department of Electrical and Electronics Engineering, TOBB Economy and Technology University, Ankara, Turkey aut NATIONALLICENCE 700 1- Bozbey Ali Department of Electrical and Electronics Engineering, TOBB Economy and Technology University, Ankara, Turkey aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 1071-1075 1557-1939 24:1-2<1071 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer