J. -. Jansson, P. Keränen, S. Jahromi and J. Kostamovaara, "Enhancing Nutt-Based Time-to-Digital Converter Performance with Internal Systematic Averaging," in IEEE Transactions on Instrumentation and Measurement. doi: 10.1109/TIM.2019.2932156
Enhancing nutt-based time-to-digital converter performance with internal systematic averaging
|Author:||Jansson, J.-P.1; Keränen, P.1; Jahromi, S.1;|
1Circuits and Systems Research Unit, University of Oulu, 90014 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 0.6 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019121046456
Institute of Electrical and Electronics Engineers,
|Publish Date:|| 2019-12-10
A time-to-digital converter (TDC) often consists of sophisticated, multilevel, sub-gate delay structures, when time intervals need to be measured precisely. The resolution improvement is rewarding until integral nonlinearity (INL) and random jitter begin to limit the measurement performance. INL can then be minimized with calibration techniques and result postprocessing. A TDC architecture based on a counter and timing signal interpolation (the Nutt method) makes it possible to measure long time intervals precisely. It also offers an effective means of improving the precision by averaging. Traditional averaging, however, demands several successive measurements, which increases the measurement time and power consumption. It is shown here that by using several interpolators that are sampled homogeneously over the clock period, the effects of limited resolution, interpolation nonlinearities and random noise can be markedly reduced. The designed CMOS TDC utilizing internal systematic sampling technique achieves 3.0ps rms single-shot precision without any additional calibration or nonlinearity correction.
IEEE transactions on instrumentation and measurement
|Pages:||1 - 8|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
This work was supported by the Academy of Finland (Centre of Excellence in Laser Scanning Research, contract no. 307362 and contracts no. 285683 and 317144).
|Academy of Finland Grant Number:||
307362 (Academy of Finland Funding decision)
285683 (Academy of Finland Funding decision)
317144 (Academy of Finland Funding decision)
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