Title :
Twelve Giga-sample per second oscillator/counter A/D converter demonstration
Author :
Johnson, Mark W. ; Herr, Quentin P. ; Dalrymple, Bruce J. ; Bunyk, Paul ; Durand, Dale J.
Author_Institution :
Northrop Grumman Spare Technol., Redondo Beach, CA, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
We describe recent demonstration of a superconductor oscillator/counter A/D Converter up through 12 GS/s with 3 effective bits of signal-to-noise ratio at that sample rate, along with analysis of its performance. Measurements are described for an A/D converter implemented in Northrop Grumman Space Technology´s 4 kA/cm2 J110D Niobium process. This A/D Converter incorporates a new technique for defining the aperture using inter-Josephson transmission line SFQ repulsion. This technique is described here.
Keywords :
Josephson effect; analogue-digital conversion; counting circuits; oscillators; superconducting junction devices; superconducting transmission lines; 4 kA/cm J110D niobium process; Northrop Grumman Space Technology; RSFQ pulse timing; SFQ pulse interaction; analog-digital conversion; inter-Josephson transmission fine SFQ repulsion; performance analysis; signal-to-noise ratio; single-flux quantum electronics; superconductor counter a/d converter; superconductor oscillator a/d converter; Apertures; Counting circuits; Niobium; Oscillators; Performance analysis; Signal analysis; Signal to noise ratio; Space technology; Superconducting transmission lines; Transmission line measurements; Analog-digital conversion; RSFQ; RSFQ pulse timing; SFQ pulse interaction; single-flux quantum electronics;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849869
