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A tdc-gpx-based time-to-digital conversion device and its working method

A technology of time-to-digital conversion and working method, applied in electrical digital data processing, instruments, etc., can solve the problems of complex design, high cost, long development cycle, etc. Effect

Active Publication Date: 2019-04-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of dedicated TDC chips usually requires FPGA as a communication bridge between the data receiving terminal (such as the upper computer PC) and the TDC chip. The design is complex, the development cycle is long, and the cost is high.

Method used

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  • A tdc-gpx-based time-to-digital conversion device and its working method
  • A tdc-gpx-based time-to-digital conversion device and its working method
  • A tdc-gpx-based time-to-digital conversion device and its working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 , image 3 shown.

[0041] A time-to-digital conversion device based on TDC-GPX comprises sequentially connected TDC-GPX chip, CYUSB3014 chip and computer for realizing human-computer interaction; CYUSB3014 chip communicates with TDC-GPX chip through GPIFII port.

Embodiment 2

[0043] The time-to-digital conversion device based on TDC-GPX as described in embodiment 1, its difference is, TDC-GPX chip is also connected with high-speed comparator, and CYUSB3014 chip adjusts circuit by comparing level (such as Figure 5As shown, among them 2, 3 ports are connected with CYUSB3014 chip) and high-speed comparator connection. The high-speed comparator is used to remove the noise in the input signal, and make the input signal reach the level requirement of the TDC-GPX chip.

Embodiment 3

[0045] Such as figure 2 shown.

[0046] The time-to-digital conversion device based on TDC-GPX as described in embodiment 2, its difference is that described comparison level adjusting circuit is 12 DAC chips that are provided with IIC interface; figure 2 Among them, the VTH port is connected to the IIC interface, the VIN port is the input port, and the Q port and The ports are two output ports connected with TDC-GPX. The comparison level adjustment circuit can use a sliding rheostat or a DAC. Although the sliding rheostat is cheap, its adjustment accuracy is poor, and its mechanical structure determines that its noise is relatively large. The invention adopts a 12-bit DAC with an IIC interface, and the IIC interface can communicate with the CYUSB3014 chip conveniently, and then the comparison level can be adjusted conveniently through a computer. At the same time, DAC has high precision, small drift, and precise adjustment, which is very suitable for high-precision syst...

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Abstract

The invention relates to a time-digital converting device and a working method thereof based on TDC-GPX. The device comprises a TDC-GPX chip, a CYUSB3014 chip and a computer achieving man-machine interaction, all of which are orderly connected. The CYUSB3014 chip is in communication with the TDC-GPX chip through a GPIFII port. The time-digital converting device and the working method thereof based on TDC-GPX have following beneficial effects: based on time-digital converting device based on TDC-GPX, the GPIFII port is utilized for communicating a USB 3.0 and the TDC-GPX chip; easy and convenient communication is achieved; high-speed data transmission is achieved; PFGA is not needed to be an interaction medium; circuit design is simplified and cost is lowered.

Description

technical field [0001] The invention relates to a TDC-GPX-based time-to-digital conversion device and a working method thereof, belonging to the technical field of digital signal conversion. Background technique [0002] A time-to-digital converter (Time-to-Digital Converter, TDC) is an instrument that converts the time interval of a pulse signal into a digital signal represented by time. Time-to-digital converters are widely used in time-correlated single-photon counting, fluorescence lifetime imaging, high-energy physics, fluorescence correlation spectroscopy, quantum information, precision time measurement, lidar, correlation measurement and other fields. [0003] In actual system applications, there are usually two ways to realize the time-to-digital converter: using a large-scale programmable gate array (FPGA) with a dedicated TDC chip, or completely using FPGA programming. For example, Chinese patent CN104363021A discloses a TDC method based on an FPGA fine delay unit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/38G06F13/40G06F13/42
CPCG06F13/385G06F13/4068G06F13/4282
Inventor 李永富张庭发刘俊良王莹方家熊
Owner SHANDONG UNIV
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