Single Shot Control Pulse Generation
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
In Josephson technology, it is useful to have a full cycle with pulse of only one cycle to be used for the SCAN mode and for single cycle diagnostic control. Such a pulse is also useful for interface timing synchronization between host circuits and test vehicles. Fig. 1 shows a circuit for generating a single-shot pulse of one cycle duration. Waveforms (a), (b), and (c) are also shown. This circuit will receive single shot and reset inputs from a host circuit at room temperature (RT) and is on the Josephson chip at low temperature (LT). The circuit combines a set-reset latch, a self resetting latch, and a two-input AND gate 10. It allows a "1" signal to latch into the two-input AND for one active duty cycle only at some indeterminate time following activation of the "single shot" control from the room temperature host.