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Pulse Generating Interface Circuit

IP.com Disclosure Number: IPCOM000059869D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Faris, SM [+details]

Abstract

In Josephson device circuitry, interface pulse generators are used between logic and memory portions of the circuits. Such interface circuits are necessary because Josephson logic circuits are AC powered while Josephson memory circuits are DC powered. The circuit of Fig. 1 is DC powered, accepts AC inputs, provides gain capability and high noise immunity, and a pulsed unipolar output. It is self-resetting and uses two Josephson devices DL and DR . Fig. 2 shows the threshold curves of Josephson devices D which are suitable for use herein. The circuit of Fig. 1 produces monopolar output pulses upon application of bipolar inputs, Iin, to the primary inductance Lp of the transformer. The induced current pulse Is flows through the secondary inductance Ls, the resistor Rs, and the Josephson devices DR and DL .