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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 (σ-value)and a nonlinearity less than ±50 ps in the measurementrange 5 to 500 ns. The power consumption of the circuit...
A time-to-digital converter (TDC) capable to measure time intervals over a range of several microseconds with an accuracy of 100 - 200 ps has been designed. The TDC has been fabricated in a 1.2 um BiCMOS process and according to preliminary test results the single-shot resolution is better than 200 ps and the nonlinearity is less than 150 ps when input time intervals range from 2.5 to 2500 ns.
Transimpedance and postamplifier structure and an interpolating time interval measurement circuit have been realized with 1.2 ??m CMOS technology. Measurement results suggest that an integrated pulsed time-of-flight laser rangefinder with a cm/dm-level measurement accuracy can be realized based on these circuit blocks.
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