Single flux quantum quasi-digital voltage amplifier
V. K. Kaplunenko, V. P. Koshelets, M. Khabipov +2 more
The novel element of the rapid single flux quantum (RSFQ) logic family-the quasi digital voltage amplifier (QDVA)-which was recently proposed theoretically, has now been designed and experimentally investigated. The QDVA can be employed both as a logic element in digital circuits and as analogue voltage amplifier. The correct operation of the SFQ doubler has been demonstrated up to the output voltage 0.5 mV and with very large margins (up to 60%). The proposed QDVA can be integrated on the same chip with a SQUID sensor; it significantly simplifies the matching circuits and seems to be very attractive for the multichannel and digital SQUID systems.
Superconductor Science and Technology•Nov 1, 1991•11 citations