Integrated Time-to-Digital Converters Based on Interpolation |
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Authors: | Elvi Räisänen-Ruotsalainen Timo Rahkonen Juha Kostamovaara |
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Affiliation: | (1) Electronics Laboratory, Department of Electrical Engineering and Infotech Oulu, University of Oulu, Linnanmaa, SF-90570 Oulu, Finland |
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Abstract: | The main features of two time-to-digital convertersbased on interpolation are presented, together with some measurementresults. The first converter is based on digital delay line interpolatorsand has been implemented in a 1.2 µm CMOS process.It has a single-shot resolution of 1 ns (-value)and a nonlinearity less than ±50 ps in the measurementrange 5 to 500 ns. The power consumption of the circuit is 15mW. The second time digitizer has analog interpolators basedon time-to-voltage conversion and has been implemented in a 1.2 µm BiCMOS process. It has a single-shot resolutionof 50 ps and a nonlinearity less than 150 ps in the measurementrange 1 to 300 ns. The power consumption of this circuit is 200mW. |
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Keywords: | time-to-digital converter time measurement interpolation delay line time-to-voltage conversion |
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