Title :
Shift registers and correlators using a two-phase single-flux quantum pulse clock
Author_Institution :
HYPRES Inc., Elmsford, NY, USA
fDate :
6/1/1993 12:00:00 AM
Abstract :
A two-phase clocking scheme for rapid single flux quantum logic circuits, in particular, shift registers and correlators, is discussed. The two-phase pulse clock is generated on chip with one external clock line. The use of a two-phase clock improves the clock operating margins and eliminate the racethrough problem. A 32-b shift register has been built and tested up to a clock frequency of 21.6 GHz. A one-bit digital correlator with 32 stages has also been tested at low speed. The chips are fabricated using a Nb process.<>
Keywords :
correlators; shift registers; superconducting junction devices; superconducting logic circuits; synchronisation; 21.6 GHz; Nb process; correlators; digital correlator; quantum logic circuits; shift registers; single-flux quantum pulse clock; two-phase clocking scheme; Circuit testing; Clocks; Correlators; DC generators; Inductors; Logic circuits; Pulse circuits; Pulse generation; Shift registers; Switches;
Journal_Title :
Applied Superconductivity, IEEE Transactions on