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On the differential nonlinearity of time-to-digital converters based on delay-locked-loop delay lines
- Source :
- IEEE Transactions on Nuclear Science. Dec, 2001, Vol. 48 Issue 6, p2424, 8 p.
- Publication Year :
- 2001
-
Abstract
- A theoretical analysis of the effects of the delay-line differential nonlinearity (DNL) on the typical performance parameters of high-resolution time-to-digital converters (TDCs) based on delay-locked-loop (DLL) delay lines has been developed. The theoretical study is based on the knowledge of the delay-line nonlinearity values that can be measured, with the desired precision, by means of a statistical code-density test. In particular, the effects on the TDC time resolution and error standard deviation curve as a function of the measured time interval are investigated. An a posteriori linearization technique, consisting in a proper correction of the TDC readouts, is then analyzed and its advantages are theoretically demonstrated. Finally, the theoretical results are superimposed on experimental data coming from a real TDC. The measured deviations from the ideal behavior are thus justified and can just be ascribed to the delay-line nonlinearity. Index Terms--Delay-locked-loop (DLL) delay lines, differential nonlinearity (DNL), high-resolution time measurement, linearization technique, time-to-digital converter (TDC).
Details
- ISSN :
- 00189499
- Volume :
- 48
- Issue :
- 6
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Nuclear Science
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.83520353