Self-correcting type time digital converter

A technology of time-to-digital converters, applied in time-to-digital converters, electrical unknown time interval measurement, devices for measuring time intervals, etc., can solve problems such as large measurement errors, achieve the effect of expanding dynamic range and improving environmental adaptability

Active Publication Date: 2017-08-11
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

However, the path delay before the measured signal is transmitted to the delay chain will be affected by temperature, so a large measurement error will

Method used

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  • Self-correcting type time digital converter

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[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

[0022] The embodiment of the present invention provides a self-correcting time-to-digital converter, such as figure 1 As shown, the self-correcting time-to-digital converter is implemented based on FPGA, and its structural composition is:

[0023] Clock unit, used to generate system clock;

[0024] Specifically, the clock unit may be an internal phase-locked loop of the FPGA, which is connected to a high-precision and high-stability external clock, and the cloc...

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Abstract

This invention discloses a self-correcting type time digital converter. The converter comprises a coarse measurement part, a fine measurement part and a correction part, wherein a counter is adopted to obtain a coarse time measurement result, a delay chain, a D trigger array and a search table unit are utilized to obtain a fine time measurement result, an offset correction unit is utilized to obtain a time measurement result, the time measurement result is the sum of the coarse time measurement result and the fine time measurement result, and then the time measurement result is corrected in combination with the temperature of current working environment which is measured by a temperature sensor. According to the scheme, the self-correcting type time digital converter can correct the measured time measurement result, and the environment adaptability of the time digital converter is improved.

Description

technical field [0001] The present application relates to the technical field of time measurement, and more specifically, to a self-correcting time-to-digital converter. Background technique [0002] Time, whether in our daily life and work, or in many fields such as scientific research, plays a very important role and is one of the most basic parameters. Time measurement technology is widely used in nuclear and particle physics, quantum physics and technology, aerospace and other national defense construction and research fields. [0003] At present, high-precision time-to-digital converters based on field-programmable gate arrays (FPGAs) are widely used, and time-interpolation measurements are performed using delay chains in FPGAs to improve the accuracy of time measurement. However, the path delay before the measured signal is transmitted to the delay chain will be affected by temperature, so a large measurement error will be introduced in a large temperature range. Ther...

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Application Information

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IPC IPC(8): G04F10/00
CPCG04F10/005
Inventor 秦熙王淋石致富谢一进荣星杜江峰
Owner UNIV OF SCI & TECH OF CHINA
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