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We present the design and test results of a new four-channel, precise, low-cost, time-event recorder. The measurement part of the recorder combines timestamp method with two-stage in-period interpolation and is implemented in off-the-shelf Spartan-6 FPGA device manufactured by Xilinx in 45 nm CMOS process. The designed device allows for simultaneous registering in the common time scale input events...
One of the main challenges in everyday life of visually impaired people is the orientation in unknown environments. Especially the avoidance of collision with obstacles when walking in public places is a major problem. In this paper a concept for a radar based navigation device for visually impaired people is investigated. The device scans the environment around the user and translates the distance...
We present the design, operation and test results of a time-to-digital converter based on multiphase clock and implemented in Kintex-7 FPGA (Xilinx). Proposed solution involves a Vernier delay line constructed with the use of Look-Up Tables and interconnect resources. Taking advantage of rising amount of available interconnect resources in modern FPGA devices a various number of phase segments in...
One of the recent methods to increase the precision of time-to-digital (T/D) conversion is based on the use of multiple independent time coding lines (TCLs). The number and configuration of TCLs influence the resolution and precision of conversion. We considered and tested 14 different variants of such lines involving up to 16 TCLs. Obtained results indicate the optimal way of using independent coding...
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