Time-to-digital converters based on RSFQ digital counters

Author

Mukhanov, O.A. ; Rylov, S.V.

Author_Institution

Hypres Inc., Elmsford, NY, USA

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

2669

Lastpage

2672

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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621788

Filename

621788