Title :
Time-to-digital converters based on RSFQ digital counters
Author :
Mukhanov, O.A. ; Rylov, S.V.
Author_Institution :
Hypres Inc., Elmsford, NY, USA
fDate :
6/1/1997 12:00:00 AM
Abstract :
We have designed, fabricated, and successfully tested a Time-to-Digital converter (TDC). The TDC circuit consists of superconductive counters based on toggle flip-flops with destructive readout, shift registers, parallel-to-serial converters, and pulse detectors. The value of the counter is latched while the counter is operating at full speed. The TDC resolution is directly determined by the maximum counter speed, or 50 ps for an available 20 GHz clock rate. The circuits are implemented in HYPRES´ standard Nb process with a critical current density of 1.0 kA/cm/sup 2/ using HYPRES´ library of standard RSFQ cells.
Keywords :
analogue-digital conversion; counting circuits; critical current density (superconductivity); detector circuits; flip-flops; nuclear electronics; shift registers; superconducting integrated circuits; 20 GHz; 50 ps; HYPRES; Nb; RSFQ digital counters; critical current density; destructive readout; parallel-to-serial converters; pulse detectors; rapid single flux quantum cells; shift registers; standard Nb process; standard RSFQ cells; superconductive counters; time-to-digital converters; toggle flip-flops; Circuit testing; Clocks; Counting circuits; Critical current density; Detectors; Flip-flops; Niobium; Pulse circuits; Shift registers; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
