ISSN 1991-2927
 

ACP № 4 (58) 2019

Structural Ways to Improve the Quality of Recirculationvernierulse Time-digital Converters

Gennady Nikolayevich Abramov, Tolyatti State University, Doctor of Engineering; Professor at ‘Industrial Electronics’ Department of Tolyatti State University; Honored Worker of Higher Professional Education of Russia; research interests include the analog-digital and digital-analog conversion of multipulse electric signals. [e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ]G. Abramov,

Yuriy Gennadievich Abramov, Tolyatti State University, Master of Engineering and Technology in ‘Electronic Devices and Appliances’; graduated from the Tolyatti State University; an author of papers in the field of analog-to-digital conversions parameters of multipulse electric signals. [e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ]Y. Abramov

Structural Ways to Improve the Quality of Recirculationvernierulse Time-digital Converters 35_13.pdf

The article examines a structural method for increasing twice the speed of the recirculation vernier pulse-time-to-digital converters (TDC) with two operating modes and discrete transformations given less than one nanosecond. In the first mode, the period of the start pulse recirculation is selected higher than the highest duration values of the converted time slot (TS). This mode consists of the fact that the start and the stop pulses of the converted TS are recycled in their respective start and stop recirculators recycling with the periods differing by the value of specified discrete transformations, and the fact that the stop pulse recirculation number is counted from the time it enters the stop-recirculator and until the time the recirculation start- and stop-pulses match. At this, each of the recirculations has the start pulse duration extended to a predetermined value of discrete transformations, and the stop pulse duration remains unchanged. In the second mode, the period of the start pulse recirculation is selected less than the highest duration values of the converted TS, and the whole conversion process is carried out in two stages. At the first stage, the number of recirculations is counted during the TS conversion having the readability equal to the period of the start-pulse recycling, while at the second stage, the number of the stop pulse recirculations is counted with given discrete transformations made from the time it enters the stop- recirculator and recirculated until the time matches the start and stop pulses, allowing you to identify the digital conversion result. And if, during the first stage of transformation recycle start- duration pulse remains unchanged, at the second stage, its duration is extended by the given value of discrete transformations in each of recycles. At the same time, the stop pulse duration remains unchanged in the recycling process. To improve the reliability of the recirculation vernier - conversion TDC pulse at the two modes, a method is provided, wherein the start pulse expansion operations are excluded in each of the recirculations, and the recycling period increases by the predetermined discrete transformation. The article gives examples for the hardware (circuit) implementation of the proposed methods and recommendations for their use.

Recirculation, recycling period, discrete transformations, time-to-digital converter, digital delay line, time slot, start and stop pulses, pulse sequence, start-recirculator, stop-recirculator.

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