Long Line Receiver for Josephson Logic Circuits
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
In logic circuits using Josephson devices, control currents transferred into transmission lines are reset at the end of the logic cycle. The time necessary to reset the end of the line is equal to the time of propagation of the control current I(c) down the line. As a result, the end of a long transmission line may still carry current sent down the line during the subsequent logic cycle, as shown in Fig. 1. In this figure, the control current 1 near the termination (TERM.) of the line is still on during the next (negative) power supply cycle of the gate voltage V(g). This causes erroneous switching of Josephson gates controlled by that current.