Patent attributes
A tri-stable storage loop useful in reciprocal quantum logic (RQL) gate circuits and systems has control and signal input lines. When alternating stable current storage states are induced in the storage loop by an alternating input provided to the control input line, provision of a positive SFQ pulse on the signal input line while the storage loop stores a positive current changes the storage loop from alternating between a positive-current state and a null-current state to alternating between a negative-current state and the null-current state, and provision of a negative SFQ pulse on the signal input line while the storage loop stores a negative current changes the storage loop from alternating between the negative-current state and the null-current state to alternating between the positive-current state and the null-current state.
