{'fraction_non_alphanumeric': 0.02530459231490159, 'fraction_numerical': 0.01499531396438613, 'mean_word_length': 5.102857142857143, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Precise Time Digitizer Based on Counting Method and Multiphase In-Period Interpolation

This paper presents the design, operation and test results of an integrated time digitizer (TD) that operation principle is based on counting of clock periods and multiphase in-period interpolation. The 720 MHz clock signal used as a time base provides 1.39 ns coarse timing resolution that is improved in the interpolation stage to 43 ps as a result of employing 32-phase clock. The digitizer is implemented in a versatile Field- Programmable Gate Array (FPGA) device (Kintex-7, 28 nm CMOS, Xilinx). Both the conversion method involved and technological platform used provide possibility of adjusting main TD’s parameters due to customer needs, so the measurement range (1.49 s) can be easily extended by increasing the capacity of binary counter, while the further improvement in resolution may be obtained by multiplication of clock phases. Moreover, due to timestamping method applied for registering of input events the number of measurement channels may also be customized.